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149-412: This airport saw many world and U.S. "firsts": the first U.S. airport hotel, the first concrete runways, the first U.S. scheduled passenger service, the first contracted airmail service, the first radio control for a commercial flight, and the first U.S. passenger terminal. The buildings were designed by architect Albert Kahn and are considered to have greatly influenced the design of airports throughout

298-412: A bitumen binder, which is frequently used for road surfaces , and polymer concretes that use polymers as a binder. Concrete is distinct from mortar . Whereas concrete is itself a building material, mortar is a bonding agent that typically holds bricks , tiles and other masonry units together. Grout is another material associated with concrete and cement. It does not contain coarse aggregates and

447-433: A French structural and civil engineer . Concrete components or structures are compressed by tendon cables during, or after, their fabrication in order to strengthen them against tensile forces developing when put in service. Freyssinet patented the technique on 2 October 1928. Concrete is an artificial composite material , comprising a matrix of cementitious binder (typically Portland cement paste or asphalt ) and

596-452: A cementitious material forms a cement paste by the process of hydration. The cement paste glues the aggregate together, fills voids within it, and makes it flow more freely. As stated by Abrams' law , a lower water-to-cement ratio yields a stronger, more durable concrete, whereas more water gives a freer-flowing concrete with a higher slump . The hydration of cement involves many concurrent reactions. The process involves polymerization ,

745-479: A completely new city or a new name applied to Nineveh, which by this point already rivalled Assur in scale and political importance. The capital was transferred under Tukulti-Ninurta II's son Ashurnasirpal II to Nimrud in 879 BC. An architectural detail separating Nimrud and the other Neo-Assyrian capitals from Assur is that they were designed in a way that emphasized royal power: the royal palaces in Assur were smaller than

894-400: A concrete component—and become a part of the binder for the aggregate. Fly ash and slag can enhance some properties of concrete such as fresh properties and durability. Alternatively, other materials can also be used as a concrete binder: the most prevalent substitute is asphalt , which is used as the binder in asphalt concrete . Admixtures are added to modify the cure rate or properties of

1043-434: A dispersed phase or "filler" of aggregate (typically a rocky material, loose stones, and sand). The binder "glues" the filler together to form a synthetic conglomerate . Many types of concrete are available, determined by the formulations of binders and the types of aggregate used to suit the application of the engineered material. These variables determine strength and density, as well as chemical and thermal resistance of

1192-452: A greater degree of fracture resistance even in seismically active environments. Roman concrete is significantly more resistant to erosion by seawater than modern concrete; it used pyroclastic materials which react with seawater to form Al- tobermorite crystals over time. The use of hot mixing and the presence of lime clasts are thought to give the concrete a self-healing ability, where cracks that form become filled with calcite that prevents

1341-481: A half thousand years after the Neo-Assyrian Empire's fall. The Assyrian army was throughout its history mostly composed of levies, mobilized only when they were needed (such as in the time of campaigns). Through regulations, obligations and sophisticated government systems, large amounts of soldiers could be recruited and mobilized already in the early Middle Assyrian period. A small central standing army unit

1490-546: A key event in the history of architecture termed the Roman architectural revolution , freed Roman construction from the restrictions of stone and brick materials. It enabled revolutionary new designs in terms of both structural complexity and dimension. The Colosseum in Rome was built largely of concrete, and the Pantheon has the world's largest unreinforced concrete dome. Concrete, as

1639-415: A large aggregate that is too large for the size of the formwork, or which has too few smaller aggregate grades to serve to fill the gaps between the larger grades, or using too little or too much sand for the same reason, or using too little water, or too much cement, or even using jagged crushed stone instead of smoother round aggregate such as pebbles. Any combination of these factors and others may result in

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1788-461: A large type of industrial facility called a concrete plant , or often a batch plant. The usual method of placement is casting in formwork , which holds the mix in shape until it has set enough to hold its shape unaided. Concrete plants come in two main types, ready-mix plants and central mix plants. A ready-mix plant blends all of the solid ingredients, while a central mix does the same but adds water. A central-mix plant offers more precise control of

1937-458: A legacy of great cultural significance, particularly through the Neo-Assyrian Empire, making a prominent impression in later Assyrian, Greco-Roman , and Hebrew literary and religious tradition. In the Old Assyrian period , when Assyria was merely a city-state centered on the city of Assur , the state was typically referred to as ālu Aššur ("city of Ashur "). From the time of its rise as

2086-406: A mix which is too harsh, i.e., which does not flow or spread out smoothly, is difficult to get into the formwork, and which is difficult to surface finish. Assyria Assyria ( Neo-Assyrian cuneiform : [REDACTED] [REDACTED] [REDACTED] [REDACTED] , māt Aššur ) was a major ancient Mesopotamian civilization that existed as a city-state from the 21st century BC to

2235-469: A mixture of calcium silicates ( alite , belite ), aluminates and ferrites —compounds, which will react with water. Portland cement and similar materials are made by heating limestone (a source of calcium) with clay or shale (a source of silicon, aluminium and iron) and grinding this product (called clinker ) with a source of sulfate (most commonly gypsum ). Cement kilns are extremely large, complex, and inherently dusty industrial installations. Of

2384-563: A new capital was perhaps inspired by developments in Babylonia in the south, where the Kassite dynasty had transferred the administration from the long-established city of Babylon to the newly constructed city of Dur-Kurigalzu , also named after a king. It seems that Tukulti-Ninurta I intended to go further than the Kassites and also establish Kar-Tukulti-Ninurta as the new Assyrian cult center. The city

2533-405: A number of manufactured aggregates, including air-cooled blast furnace slag and bottom ash are also permitted. The size distribution of the aggregate determines how much binder is required. Aggregate with a very even size distribution has the biggest gaps whereas adding aggregate with smaller particles tends to fill these gaps. The binder must fill the gaps between the aggregate as well as paste

2682-598: A recovery. Under the Achaemenids, most of the territory was organized into the province Athura ( Aθūrā ). The organization into a single large province, the lack of interference of the Achaemenid rulers in local affairs, and the return of the cult statue of Ashur to Assur soon after the Achaemenids conquered Babylon facilitated the survival of Assyrian culture. Under the Seleucid Empire , which controlled Mesopotamia from

2831-424: A semi-liquid slurry (paste) that can be shaped, typically by pouring it into a form. The concrete solidifies and hardens through a chemical process called hydration . The water reacts with the cement, which bonds the other components together, creating a robust, stone-like material. Other cementitious materials, such as fly ash and slag cement , are sometimes added—either pre-blended with the cement or directly as

2980-640: A significant amount of territory into the growing Assyrian Empire. Under Shalmaneser I, the last remnants of the Mitanni kingdom were formally annexed into Assyria. The most successful of the Middle Assyrian kings was Tukulti-Ninurta I, who brought the Middle Assyrian Empire to its greatest extent. His most notable military achievements were his victory at the Battle of Nihriya c. 1237 BC, which marked

3129-493: A simple, fast way of getting a basic idea of the properties of the finished concrete without having to perform testing in advance. Various governing bodies (such as British Standards ) define nominal mix ratios into a number of grades, usually ranging from lower compressive strength to higher compressive strength. The grades usually indicate the 28-day cure strength. Thorough mixing is essential to produce uniform, high-quality concrete. Separate paste mixing has shown that

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3278-461: A small empire in the regions of southern Syria and northern Jordan from the 4th century BC. They discovered the advantages of hydraulic lime , with some self-cementing properties, by 700 BC. They built kilns to supply mortar for the construction of rubble masonry houses, concrete floors, and underground waterproof cisterns . They kept the cisterns secret as these enabled the Nabataeans to thrive in

3427-469: A territorial state in the 14th century BC and onward, Assyria was referred to in official documents as māt Aššur ("land of Ashur"), marking its shift to being a regional polity. The first attested use of the term māt Aššur is during the reign of Ashur-uballit I ( c. 1363–1328 BC), who was the first king of the Middle Assyrian Empire . Both ālu Aššur and māt Aššur derive from the name of

3576-412: A unit of their own. Based on surviving depictions, chariots were crewed by two soldiers: an archer who commanded the chariot ( māru damqu ) and a driver ( ša mugerre ). Chariots first entered extensive military use under Tiglath-Pileser I in the 12th–11th centuries BC and were in the later Neo-Assyrian period gradually phased out in favor of cavalry ( ša petḫalle ). In the Middle Assyrian period, cavalry

3725-484: Is exothermic , which means ambient temperature plays a significant role in how long it takes concrete to set. Often, additives (such as pozzolans or superplasticizers ) are included in the mixture to improve the physical properties of the wet mix, delay or accelerate the curing time, or otherwise change the finished material. Most concrete is poured with reinforcing materials (such as steel rebar ) embedded to provide tensile strength , yielding reinforced concrete . In

3874-405: Is a composite material composed of aggregate bonded together with a fluid cement that cures to a solid over time. Concrete is the second-most-used substance in the world after water , and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. When aggregate is mixed with dry Portland cement and water ,

4023-710: Is first attested for the site in documents of the Akkadian period in the 24th century BC. Through most of the Early Assyrian period ( c. 2600–2025 BC), Assur was dominated by states and polities from southern Mesopotamia. Early on, Assur for a time fell under the loose hegemony of the Sumerian city of Kish and it was later occupied by both the Akkadian Empire and then the Third Dynasty of Ur . In c. 2025 BC, due to

4172-468: Is flat and had been covered with cement". "The floors were cement, in some places hard, but, by long exposure, broken, and now crumbling under the feet." "But throughout the wall was solid, and consisting of large stones imbedded in mortar, almost as hard as rock." Small-scale production of concrete-like materials was pioneered by the Nabatean traders who occupied and controlled a series of oases and developed

4321-559: Is then blended with aggregates and any remaining batch water and final mixing is completed in conventional concrete mixing equipment. Workability is the ability of a fresh (plastic) concrete mix to fill the form/mold properly with the desired work (pouring, pumping, spreading, tamping, vibration) and without reducing the concrete's quality. Workability depends on water content, aggregate (shape and size distribution), cementitious content and age (level of hydration ) and can be modified by adding chemical admixtures, like superplasticizer. Raising

4470-562: Is usually either pourable or thixotropic , and is used to fill gaps between masonry components or coarse aggregate which has already been put in place. Some methods of concrete manufacture and repair involve pumping grout into the gaps to make up a solid mass in situ . The word concrete comes from the Latin word " concretus " (meaning compact or condensed), the perfect passive participle of " concrescere ", from " con -" (together) and " crescere " (to grow). Concrete floors were found in

4619-399: Is usually reinforced with materials that are strong in tension, typically steel rebar . The mix design depends on the type of structure being built, how the concrete is mixed and delivered, and how it is placed to form the structure. Portland cement is the most common type of cement in general usage. It is a basic ingredient of concrete, mortar , and many plasters . It consists of

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4768-562: The Islamic State , have resulted in most of the Assyrian people living in diaspora . In the Assur city-state of the Old Assyrian period, the government was in many respects an oligarchy , where the king was a permanent, albeit not the only prominent, actor. The Old Assyrian kings were not autocrats , with sole power, but rather acted as stewards on behalf of the god Ashur and presided over

4917-578: The Medes under Cyaxares in 615/614 BC, led to the Medo-Babylonian conquest of the Assyrian Empire . Assur was sacked in 614 BC and Nineveh fell in 612 BC. The last Assyrian ruler, Ashur-uballit II , tried to rally the Assyrian army at Harran in the west but he was defeated in 609 BC, marking the end of the ancient line of Assyrian kings and of Assyria as a state. Despite the violent downfall of

5066-550: The Neolithic , the earliest archaeological evidence from Assur dates to the Early Dynastic Period , c. 2600 BC. During this time, the surrounding region was already relatively urbanized. There is no evidence that early Assur was an independent settlement, and it might not have been called Assur at all initially, but rather Baltil or Baltila, used in later times to refer to the city's oldest portion. The name "Assur"

5215-619: The Upper and the Lower Seas" and " king of all peoples ". Royal titles and epithets were often highly reflective of current political developments and the achievements of individual kings; during periods of decline, the royal titles used typically grew more simple again, only to grow grander once more as Assyrian power experienced resurgences. The kings of the Middle and Neo-Assyrian periods continued to present themselves, and be viewed by their subjects, as

5364-480: The construction industry , whose demand is ever growing with greater impacts on raw material extraction, waste generation and landfill practices. Concrete production is the process of mixing together the various ingredients—water, aggregate, cement, and any additives—to produce concrete. Concrete production is time-sensitive. Once the ingredients are mixed, workers must put the concrete in place before it hardens. In modern usage, most concrete production takes place in

5513-469: The largest empire then yet assembled in world history, spanning from parts of modern-day Iran in the east to Egypt in the west. The Neo-Assyrian Empire fell in the late 7th century BC, conquered by a coalition of the Babylonians, who had lived under Assyrian rule for about a century, and the Medes . Though the core urban territory of Assyria was extensively devastated in the Medo-Babylonian conquest of

5662-420: The ālāyû ("village residents"), ālik ilke (people recruited through the ilku system) and the hupšu , though what these designations meant in terms of social standing and living standards is not known. The Middle Assyrian structure of society by and large endured through the subsequent Neo-Assyrian period. Below the higher classes of Neo-Assyrian society were free citizens, semi-free laborers and slaves. It

5811-455: The "outer realm" was regarded as a threat to the cosmic order within Assyria and as such, it was the king's duty to expand the realm of Ashur and incorporate these strange lands, converting chaos to civilization. Texts describing the coronation of Middle and Neo-Assyrian kings at times include Ashur commanding the king to "broaden the land of Ashur" or "extend the land at his feet". As such, expansion

5960-510: The 14th century BC and eventually expanded into an empire from the 14th century BC to the 7th century BC. Spanning from the early Bronze Age to the late Iron Age , modern historians typically divide ancient Assyrian history into the Early Assyrian ( c. 2600–2025 BC), Old Assyrian ( c. 2025–1364 BC), Middle Assyrian ( c. 1363–912 BC), Neo-Assyrian (911–609 BC), and post-imperial (609 BC– c. AD 240) periods, based on political events and gradual changes in language. Assur ,

6109-578: The Amorite conqueror Shamshi-Adad I, the earliest ruler of Assur to use the style šarrum (king) and the title ' king of the Universe '. Shamshi-Adad I appears to have based his more absolute form of kingship on the rulers of the Old Babylonian Empire. Under Shamshi-Adad I, Assyrians also swore their oaths by the king, not just by the god. This practice did not survive beyond his death. The influence of

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6258-527: The Assyrian Empire and the succeeding Neo-Babylonian Empire invested few resources in rebuilding it, ancient Assyrian culture and traditions continued to survive for centuries throughout the post-imperial period. Assyria experienced a recovery under the Seleucid and Parthian empires, though it declined again under the Sasanian Empire , which sacked numerous cities and semi-independent Assyrian territories in

6407-487: The Assyrian Empire, Assyrian culture continued to survive through the subsequent post-imperial period (609 BC – c. AD 240) and beyond. The Assyrian heartland experienced a dramatic decrease in the size and number of inhabited settlements during the rule of the Neo-Babylonian Empire founded by Nabopolassar; the former Assyrian capital cities Assur, Nimrud and Nineveh were nearly completely abandoned. Throughout

6556-456: The Assyrian administration was the position of vizier ( sukkallu ). From at least the time of Shalmaneser I onward, there were grand viziers ( sukkallu rabi’u ), superior to the ordinary viziers, who at times governed their own lands as appointees of the kings. At least in the Middle Assyrian period, the grand viziers were typically members of the royal family and the position was at this time, as were many other offices, hereditary. The elite of

6705-412: The Assyrian heartland were also significantly fragmented, it would ultimately be relatively easy for the reinvigorated Assyrian army to reconquer large parts of the empire. Under Ashur-dan II ( r.   934–912 BC), who campaigned in the northeast and northwest, Assyrian decline was at last reversed, paving the way for grander efforts under his successors. The end of his reign conventionally marks

6854-460: The Assyrian kings could also grant arable lands to individuals in exchange for goods and military service. To overcome the challenges of governing a large empire, the Neo-Assyrian Empire developed a sophisticated state communication system , which included various innovative techniques and relay stations . Per estimates by Karen Radner , an official message sent in the Neo-Assyrian period from

7003-466: The Assyrian kings. The modern name "Assyria" is of Greek origin, derived from Ασσυρία ( Assuría ). The term's first attested use is during the time of the ancient Greek historian Herodotus (5th century BC). The Greeks called the Levant " Syria " and Mesopotamia "Assyria", even though the local population, both at that time and well into the later Christian period, used both terms interchangeably to refer to

7152-510: The Assyrian lands adopted distinct appellations for the region, with a significant portion of these names also being rooted in Aššur . The Achaemenid Empire referred to Assyria as Aθūrā ("Athura"). The Sasanian Empire inexplicably referred to Lower Mesopotamia as Asoristan ("land of the Assyrians"), though the northern province of Nōdšīragān , which included much of the old Assyrian heartland,

7301-464: The Assyrian national deity Ashur. Ashur probably originated in the Early Assyrian period as a deified personification of Assur itself. In the Old Assyrian period the deity was considered the formal king of Assur; the actual rulers only used the style Išši'ak ("governor"). From the time of Assyria's rise as a territorial state, Ashur began to be regarded as an embodiment of the entire land ruled by

7450-595: The Greek ones, the shortened form "Syria" is attested as a synonym for Assyria, notably in Luwian and Aramaic texts from the time of the Neo-Assyrian Empire, modern scholars overwhelmingly support the conclusion that the names are connected. Both "Assyria" and the contraction, "Syria," are ultimately derived from the Akkadian Aššur . Following the decline of the Neo-Assyrian Empire, the subsequent empires that held dominion over

7599-410: The Middle Assyrian Empire, there were several groups among the lower classes, the highest of which were the free men ( a’ılū ), who like the upper classes could receive land in exchange for performing duties for the government, but who could not live on these lands since they were comparably small. Below the free men were the unfree men ( šiluhlu̮ ). The unfree men had given up their freedom and entered

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7748-399: The Middle Assyrian period, foot soldiers were divided into the sạ bū ša kakkē ("weapon troops") and the sạ bū ša arâtē ("shield-bearing troops") but surviving records are not detailed enough to determine what the differences were. It is possible that the sạ bū ša kakkē included ranged troops, such as slingers ( ṣābū ša ušpe ) and archers ( ṣābū ša qalte ). The chariots in the army composed

7897-542: The Near East. In his ninth campaign, Ashurnasirpal II marched to the coast of the Mediterranean Sea , collecting tribute from various kingdoms on the way. A significant development during Ashurnasirpal II's reign was the second attempt to transfer the Assyrian capital away from Assur. Ashurnasirpal restored the ancient and ruined town of Nimrud , also located in the Assyrian heartland, and in 879 BC designated that city as

8046-621: The Neo-Assyrian Empire was expanded and included several different offices. The Neo-Assyrian inner elite is typically divided by modern scholars into the "magnates", a set of high-ranking offices, and the "scholars" ( ummânī ), tasked with advising and guiding the kings through interpreting omens. The magnates included the offices masennu (treasurer), nāgir ekalli (palace herald), rab šāqê (chief cupbearer), rab ša-rēši (chief officer/eunuch), sartinnu (chief judge), sukkallu (grand vizier) and turtanu (commander-in-chief), which at times continued to be occupied by royal family members. Some of

8195-610: The Neo-Assyrian army was likely several hundred thousand. The Neo-Assyrian army was subdivided into kiṣru , composed of perhaps 1,000 soldiers, most of whom would have been infantry soldiers ( zūk , zukkû or raksūte ). The infantry was divided into three types: light, medium and heavy, with varying weapons, level of armor and responsibilities. While on campaign, the Assyrian army made heavy use of both interpreters/translators ( targumannu ) and guides ( rādi kibsi ), both probably being drawn from foreigners resettled in Assyra. The majority of

8344-407: The Old Assyrian period, it is evident that women were free to learn how to read and write. Both men and women paid the same fines, could inherit property, participated in trade, bought, owned, and sold houses and slaves, made their own last wills, and were allowed to divorce their partners. Records of Old Assyrian marriages confirm that the dowry to the bride belonged to her, not the husband, and it

8493-504: The Romans knew it, was a new and revolutionary material. Laid in the shape of arches , vaults and domes , it quickly hardened into a rigid mass, free from many of the internal thrusts and strains that troubled the builders of similar structures in stone or brick. Modern tests show that opus caementicium had as much compressive strength as modern Portland-cement concrete (c. 200 kg/cm  [20 MPa; 2,800 psi]). However, due to

8642-587: The U.S. The original aircraft facilities were in use as part of the Ford testing facilities at the proving ground. However, the original (greatly modified) passenger terminal was demolished in 1961, and the remaining hangar, used as an experimental engine test facility since the late 1940s, was demolished in 2018. Only The Dearborn Inn , a hotel that was built across the road to serve the airport, remains. Combined Statistical Area : Combined Statistical Area : Combined Statistical Area : Concrete Concrete

8791-639: The absence of reinforcement, its tensile strength was far lower than modern reinforced concrete , and its mode of application also differed: Modern structural concrete differs from Roman concrete in two important details. First, its mix consistency is fluid and homogeneous, allowing it to be poured into forms rather than requiring hand-layering together with the placement of aggregate, which, in Roman practice, often consisted of rubble . Second, integral reinforcing steel gives modern concrete assemblies great strength in tension, whereas Roman concrete could depend only upon

8940-475: The beginning of the Neo-Assyrian Empire (911–609 BC). Through decades of conquests, the early Neo-Assyrian kings worked to retake the lands of the Middle Assyrian Empire. Since this reconquista had to begin nearly from scratch, its eventual success was an extraordinary achievement. Under Ashurnasirpal II ( r.   883–859 BC), the Neo-Assyrian Empire became the dominant political power in

9089-445: The beginning of the end of Hittite influence in northern Mesopotamia, and his temporary conquest of Babylonia, which became an Assyrian vassal c. 1225–1216 BC. Tukulti-Ninurta was also the first Assyrian king to try to move the capital away from Assur, inaugurating the new city Kar-Tukulti-Ninurta as capital c. 1233 BC. The capital was returned to Assur after his death. Tukulti-Ninurta I's assassination c. 1207 BC

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9238-477: The bottom of this hierarchy were lower officials, such as village managers ( rab ālāni ) who oversaw one or more villages, collecting taxes in the form of labor and goods and keeping the administration informed of the conditions of their settlements, and corvée officers ( ša bēt-kūdini ) who kept tallies on the labor performed by forced laborers and the remaining time owed. Individual cities had their own administrations, headed by mayors ( ḫazi’ānu ), responsible for

9387-411: The capital to the new city of Dur-Sharrukin in 706 BC and the year after, Sennacherib transferred the capital to Nineveh, which he ambitiously expanded and renovated, and might even have built the hanging gardens there, one of the seven wonders of the ancient world. The 671 BC conquest of Egypt under Esarhaddon ( r.   681–669 BC) brought Assyria to its greatest ever extent. After

9536-403: The city assembly had disappeared by the beginning of the Middle Assyrian period. Though the traditional iššiak Aššur continued to be used at times, the Middle Assyrian kings were autocrats, in terms of power having little in common with the rulers of the Old Assyrian period. As the Assyrian Empire grew, the kings began to employ an increasingly sophisticated array of royal titles. Ashur-uballit I

9685-401: The city's formal king. That the populace of Assur in the Old Assyrian period often referred to the king as rubā’um ("great one") clearly indicates that the kings, despite their limited executive power, were seen as royal figures and as being primus inter pares (first among equals) among the powerful individuals of the city. Assur first experienced a more autocratic form of kingship under

9834-399: The civil administration and the army began to be occupied by eunuchs with deliberately obscure and lowly origins since this ensured that they would be loyal to the king. Eunuchs were trusted since they were believed to not be able to have any dynastic aspirations of their own. From the time of Erishum I in the early Old Assyrian period onward, a yearly office-holder, a limmu official,

9983-593: The collapse of the Third Dynasty of Ur, Assur became an independent city-state under Puzur-Ashur I . Assur was under the Puzur-Ashur dynasty home to less than 10,000 people and likely held very limited military power; no military institutions at all are known from this time and no political influence was exerted on neighboring cities. The city was still influential in other ways; under Erishum I ( r.   c. 1974–1934 BC), Assur experimented with free trade ,

10132-420: The common meaning of the term. A number of wardum are however also recorded as being bought and sold. The main evidence concerning the lives of ordinary women in ancient Assyria is in administrative documents and law codes. There was no legal distinction between men and women in the Old Assyrian period and they had more or less the same rights in society. Since several letters written by women are known from

10281-526: The concrete at the time of batching/mixing. (See § Production below.) The common types of admixtures are as follows: Inorganic materials that have pozzolanic or latent hydraulic properties, these very fine-grained materials are added to the concrete mix to improve the properties of concrete (mineral admixtures), or as a replacement for Portland cement (blended cements). Products which incorporate limestone , fly ash , blast furnace slag , and other useful materials with pozzolanic properties into

10430-399: The concrete can cause the initially placed material to begin to set before the next batch is added on top. This creates a horizontal plane of weakness called a cold joint between the two batches. Once the mix is where it should be, the curing process must be controlled to ensure that the concrete attains the desired attributes. During concrete preparation, various technical details may affect

10579-461: The concrete quality. Central mix plants must be close to the work site where the concrete will be used, since hydration begins at the plant. A concrete plant consists of large hoppers for storage of various ingredients like cement, storage for bulk ingredients like aggregate and water, mechanisms for the addition of various additives and amendments, machinery to accurately weigh, move, and mix some or all of those ingredients, and facilities to dispense

10728-405: The country. Governors had to pay both taxes and offer gifts to the god Ashur, though such gifts were usually small and mainly symbolic. The channeling of taxes and gifts were not only a method of collecting profit but also served to connect the elite of the entire empire to the Assyrian heartland. In the Neo-Assyrian period, an extensive hierarchy within the provincial administration is attested. At

10877-477: The crack from spreading. The widespread use of concrete in many Roman structures ensured that many survive to the present day. The Baths of Caracalla in Rome are just one example. Many Roman aqueducts and bridges, such as the magnificent Pont du Gard in southern France, have masonry cladding on a concrete core, as does the dome of the Pantheon . After the Roman Empire, the use of burned lime and pozzolana

11026-466: The death of Ashurbanipal ( r.   669–631 BC), the Neo-Assyrian Empire swiftly collapsed. One of the primary reasons was the inability of the Neo-Assyrian kings to resolve the "Babylonian problem"; despite many attempts to appease Babylonia in the south, revolts were frequent all throughout the Sargonid period. The revolt of Babylon under Nabopolassar in 626 BC, in combination with an invasion by

11175-415: The decline and made significant conquests, their conquests were ephemeral and shaky, quickly lost again. From the time of Eriba-Adad II ( r.   1056–1054 BC) onward, Assyrian decline intensified. The Assyrian heartland remained safe since it was protected by its geographical remoteness. Since Assyria was not the only state to undergo decline during these centuries, and the lands surrounding

11324-554: The desert. Some of these structures survive to this day. In the Ancient Egyptian and later Roman eras, builders discovered that adding volcanic ash to lime allowed the mix to set underwater. They discovered the pozzolanic reaction . The Romans used concrete extensively from 300 BC to AD 476. During the Roman Empire, Roman concrete (or opus caementicium ) was made from quicklime , pozzolana and an aggregate of pumice . Its widespread use in many Roman structures ,

11473-421: The earliest known such experiment in world history, which left the initiative for trade and large-scale foreign transactions entirely to the populace rather than the state. Royal encouragement of trade led to Assur quickly establishing itself as a prominent trading city in northern Mesopotamia and soon thereafter establishing an extensive long-distance trade network, the first notable impression Assyria left in

11622-406: The early 14th century BC as the Middle Assyrian Empire. In the Middle and Neo-Assyrian periods, Assyria was one of the two major Mesopotamian kingdoms, alongside Babylonia in the south, and at times became the dominant power in the ancient Near East . Assyria was at its strongest in the Neo-Assyrian period, when the Assyrian army was the strongest military power in the world and the Assyrians ruled

11771-445: The early Middle Assyrian kings to expand and consolidate territories in northern Mesopotamia. Under the warrior-kings Adad-nirari I ( r.   c. 1305–1274 BC), Shalmaneser I ( r.   c. 1273–1244 BC) and Tukulti-Ninurta I ( r.   c. 1243–1207 BC), Assyria began to realize its aspirations of becoming a significant regional power. These kings campaigned in all directions and incorporated

11920-420: The eldest daughter of a family was consecrated as a priestess. She was not allowed to marry and became economically independent. Wives were expected to provide their husbands with garments and food. Although marriages were typically monogamous , husbands were allowed to buy a female slave in order to produce an heir if his wife was infertile . The wife was allowed to choose that slave and the slave never gained

12069-419: The end of the 2nd century BC, the city may have become the capital of its own small semi-autonomous Assyrian realm, either under the suzerainty of Hatra, or under direct Parthian suzerainty. On account of the resemblance between the stelae by the local rulers and those of the ancient Assyrian kings, they may have seen themselves as the restorers and continuators of the old royal line. The ancient Ashur temple

12218-508: The entire region. It is not known whether the Greeks began referring to Mesopotamia as "Assyria" because they equated the region with the Assyrian Empire, long fallen by the time the term is first attested, or because they named the region after the people who lived there, the Assyrians. Because the term is so " similar to Syria ", scholars have been examining since the 17th century whether the two terms are connected. And because, in sources predating

12367-431: The finished product. Construction aggregates consist of large chunks of material in a concrete mix, generally a coarse gravel or crushed rocks such as limestone , or granite , along with finer materials such as sand . Cement paste, most commonly made of Portland cement , is the most prevalent kind of concrete binder. For cementitious binders, water is mixed with the dry cement powder and aggregate, which produces

12516-531: The first Assyrian capital, was founded c. 2600 BC, but there is no evidence that the city was independent until the collapse of the Third Dynasty of Ur , in the 21st century BC, when a line of independent kings starting with Puzur-Ashur I began ruling the city. Centered in the Assyrian heartland in northern Mesopotamia, Assyrian power fluctuated over time. The city underwent several periods of foreign rule or domination before Assyria rose under Ashur-uballit I in

12665-411: The geographical and ethnic origin of slaves, there is only a single known such reference in Old Assyrian texts (whereas there are many describing slaves in a general sense), a slave girl explicitly being referred to as Subaraean , indicating that ethnicity was not seen as very important in terms of slavery. The surviving evidence suggests that the number of slaves in Assyria never reached a large share of

12814-450: The historical record. Among the evidence left from this trade network are large collections of Old Assyrian cuneiform tablets from Assyrian trade colonies, the most notable of which is a set of 22,000 clay tablets found at Kültepe , near the modern city of Kayseri in Turkey. As trade declined, perhaps due to increased warfare and conflict between the growing states of the Near East, Assur

12963-628: The ideological status of Assur was never fully superseded and it remained a ceremonial center in the empire even when it was governed from elsewhere. The transfer of the royal seat of power to other cities was ideologically possible since the king was Ashur's representative on Earth. The king, like the deity embodied Assyria itself, and so the capital of Assyria was in a sense wherever the king happened to have his residence. The first transfer of administrative power away from Assur occurred under Tukulti-Ninurta I, who c. 1233 BC inaugurated Kar-Tukulti-Ninurta as capital. Tukulti-Ninurta I's foundation of

13112-554: The interlinking of the silicates and aluminate components as well as their bonding to sand and gravel particles to form a solid mass. One illustrative conversion is the hydration of tricalcium silicate: The hydration (curing) of cement is irreversible. Fine and coarse aggregates make up the bulk of a concrete mixture. Sand , natural gravel, and crushed stone are used mainly for this purpose. Recycled aggregates (from construction, demolition, and excavation waste) are increasingly used as partial replacements for natural aggregates, while

13261-432: The intermediaries between Ashur and mankind. This position and role was used to justify imperial expansion: the Assyrians saw their empire as being the part of the world overseen and administered by Ashur through his human agents. In their ideology, the outer realm outside of Assyria was characterized by chaos and the people there were uncivilized, with unfamiliar cultural practices and strange languages. The mere existence of

13410-587: The late 19th and early 20th century, when the Ottomans grew increasingly nationalistic, further persecutions and massacres were enacted against the Assyrians, most notably the Sayfo (Assyrian genocide), which resulted in the deaths of as many as 250,000 Assyrians. Throughout the 20th century, many unsuccessful proposals have been made by the Assyrians for autonomy or independence. Further massacres and persecutions, enacted both by governments and by terrorist groups such as

13559-477: The late 4th to mid-2nd century BC, Assyrian sites such as Assur, Nimrud and Nineveh were resettled and a large number of villages were rebuilt and expanded. After the Parthian Empire conquered the region in the 2nd century BC, the recovery of Assyria continued, culminating in an unprecedented return to prosperity and revival in the 1st to 3rd centuries AD. The region was resettled and restored so intensely that

13708-415: The local economy and production. Some regions of the Assyrian Empire were not incorporated into the provincial system but were still subjected to the rule of the Assyrian kings. Such vassal states could be ruled indirectly through allowing established local lines of kings to continue ruling in exchange for tribute or through the Assyrian kings appointing their own vassal rulers. Through the ilku system ,

13857-614: The loss of political power, the Assyrians continued to constitute a significant portion of the population in northern Mesopotamia until religiously motivated suppression and massacres under the Ilkhanate and the Timurid Empire in the 14th century, which relegated them to a local ethnic and religious minority. The Assyrians lived largely in peace under the rule of the Ottoman Empire , which gained control of Assyria in 16th century. In

14006-423: The magnates also acted as governors of important provinces and all of them were deeply involved with the Assyrian military, controlling significant forces. They also owned large tax-free estates, scattered throughout the empire. In the late Neo-Assyrian Empire, there was a growing disconnect between the traditional Assyrian elite and the kings due to eunuchs growing unprecedently powerful. The highest offices both in

14155-468: The magnates", when powerful officials and generals were the principal wielders of political power rather than the king. This time of stagnation came to an end with the rise of Tiglath-Pileser III ( r.   745–727 BC), who reduced the power of the magnates, consolidated and centralized the holdings of the empire, and through his military campaigns and conquests more than doubled the extent of Assyrian territory. The most significant conquests were

14304-406: The making of mortar. In an English translation from 1397, it reads "lyme ... is a stone brent; by medlynge thereof with sonde and water sement is made". From the 14th century, the quality of mortar was again excellent, but only from the 17th century was pozzolana commonly added. The Canal du Midi was built using concrete in 1670. Perhaps the greatest step forward in the modern use of concrete

14453-531: The material. Mineral admixtures use recycled materials as concrete ingredients. Conspicuous materials include fly ash , a by-product of coal-fired power plants ; ground granulated blast furnace slag , a by-product of steelmaking ; and silica fume , a by-product of industrial electric arc furnaces . Structures employing Portland cement concrete usually include steel reinforcement because this type of concrete can be formulated with high compressive strength , but always has lower tensile strength . Therefore, it

14602-554: The meetings of the city assembly, the main Assyrian administrative body during this time. The composition of the city assembly is not known, but it is generally believed to have been made up of members of the most powerful families of the city, many of whom were merchants. The king acted as the main executive officer and chairman of this group of influential individuals and also contributed with legal knowledge and expertise. The Old Assyrian kings were styled as iššiak Aššur ("governor [on behalf] of Ashur "), with Ashur being considered

14751-419: The mix, are being tested and used. These developments are ever growing in relevance to minimize the impacts caused by cement use, notorious for being one of the largest producers (at about 5 to 10%) of global greenhouse gas emissions . The use of alternative materials also is capable of lowering costs, improving concrete properties, and recycling wastes, the latest being relevant for circular economy aspects of

14900-478: The mixed concrete, often to a concrete mixer truck. Modern concrete is usually prepared as a viscous fluid, so that it may be poured into forms. The forms are containers that define the desired shape. Concrete formwork can be prepared in several ways, such as slip forming and steel plate construction . Alternatively, concrete can be mixed into dryer, non-fluid forms and used in factory settings to manufacture precast concrete products. Interruption in pouring

15049-441: The mixing of cement and water into a paste before combining these materials with aggregates can increase the compressive strength of the resulting concrete. The paste is generally mixed in a high-speed , shear-type mixer at a w/c (water to cement ratio) of 0.30 to 0.45 by mass. The cement paste premix may include admixtures such as accelerators or retarders, superplasticizers , pigments , or silica fume . The premixed paste

15198-440: The mixture forms a fluid slurry that is easily poured and molded into shape. The cement reacts with the water through a process called concrete hydration that hardens it over several hours to form a hard matrix that binds the materials together into a durable stone-like material that has many uses. This time allows concrete to not only be cast in forms, but also to have a variety of tooled processes performed. The hydration process

15347-437: The nearest being the idea of a "city of kingship", i.e. an administrative center used by the king, but there are several examples of kingdoms having multiple "cities of kingship". Due to Assyria growing out of the Assur city-state of the Old Assyrian period, and due to the city's religious importance, Assur was the administrative center of Assyria through most of its history. Though the royal administration at times moved elsewhere,

15496-406: The new capital of the empire. Though no longer the political capital, Assur remained the ceremonial and religious center of Assyria. Ashurnasirpal II's son Shalmaneser III ( r.   859–824 BC) also went on wide-ranging wars of conquest, expanding the empire in all directions. After Shalmaneser III's death, the Neo-Assyrian Empire entered into a period of stagnation dubbed the "age of

15645-428: The past, lime -based cement binders, such as lime putty, were often used but sometimes with other hydraulic cements , (water resistant) such as a calcium aluminate cement or with Portland cement to form Portland cement concrete (named for its visual resemblance to Portland stone ). Many other non-cementitious types of concrete exist with other methods of binding aggregate together, including asphalt concrete with

15794-402: The people who followed those gods should be subjected to the representative of Ashur, the Assyrian king. The kings also had religious and judicial duties. Kings were responsible for performing various rituals in support of the cult of Ashur and the Assyrian priesthood. They were expected, together with the Assyrian people, to provide offerings to not only Ashur but also all the other gods. From

15943-510: The political situation in northern Mesopotamia was highly volatile, with Assur at times coming under the brief control of Eshnunna , Elam and the Old Babylonian Empire . At some point, the city returned to being an independent city-state, though the politics of Assur itself were volatile as well, with fighting between members of Shamshi-Adad's dynasty, native Assyrians and Hurrians for control. The infighting came to an end after

16092-475: The population and settlement density reached heights not seen since the Neo-Assyrian Empire. The region was under the Parthians primarily ruled by a group of vassal kingdoms, including Osroene , Adiabene and Hatra . Though in some aspects influenced by Assyrian culture, these states were for the most part not ruled by Assyrian rulers. Assur itself flourished under Parthian rule. From around or shortly after

16241-440: The population of ancient Assyria were farmers who worked land owned by their families. Old Assyrian society was divided into two main groups: slaves ( subrum ) and free citizens, referred to as awīlum ("men") or DUMU Aššur ("sons of Ashur"). Among the free citizens there was also a division into rabi ("big") and ṣaher ("small") members of the city assembly. Assyrian society grew more complex and hierarchical over time. In

16390-468: The population. In the Akkadian language , several terms were used for slaves, commonly wardum , though this term could confusingly also be used for (free) official servants, retainers and followers, soldiers and subjects of the king. Because many individuals designated as wardum in Assyrian texts are described as handling property and carrying out administrative tasks on behalf of their masters, many may have in actuality been free servants and not slaves in

16539-506: The properties or increase the performance envelope of the mix. Design-mix concrete can have very broad specifications that cannot be met with more basic nominal mixes, but the involvement of the engineer often increases the cost of the concrete mix. Concrete mixes are primarily divided into nominal mix, standard mix and design mix. Nominal mix ratios are given in volume of Cement : Sand : Aggregate {\displaystyle {\text{Cement : Sand : Aggregate}}} . Nominal mixes are

16688-468: The quality and nature of the product. Design mix ratios are decided by an engineer after analyzing the properties of the specific ingredients being used. Instead of using a 'nominal mix' of 1 part cement, 2 parts sand, and 4 parts aggregate (the second example from above), a civil engineer will custom-design a concrete mix to exactly meet the requirements of the site and conditions, setting material ratios and often designing an admixture package to fine-tune

16837-755: The region, including Assur itself. The remaining Assyrian people , who have survived in northern Mesopotamia to modern times, were gradually Christianized from the 1st century AD onward. Ancient Mesopotamian religion persisted at Assur until its final sack in the 3rd century AD, and at certain other holdouts for centuries thereafter. The triumph of ancient Assyria can be attributed not only to its vigorous warrior-monarchs but also to its adeptness in efficiently assimilating and governing conquered territories using inventive and advanced administrative mechanisms. The developments in warfare and governance introduced by ancient Assyria continued to be employed by subsequent empires and states for centuries. Ancient Assyria also left

16986-565: The rise of Bel-bani as king c. 1700 BC. Bel-bani founded the Adaside dynasty , which after his reign ruled Assyria for about a thousand years. Assyria's rise as a territorial state in later times was in large part facilitated by two separate invasions of Mesopotamia by the Hittites . An invasion by the Hittite king Mursili I in c. 1595 BC destroyed the dominant Old Babylonian Empire, allowing

17135-524: The rise of the Middle Assyrian Empire ( c. 1363–912 BC). Ashur-uballit I was the first native Assyrian ruler to claim the royal title šar ("king"). Shortly after achieving independence, he further claimed the dignity of a great king on the level of the Egyptian pharaohs and the Hittite kings . Assyria's rise was intertwined with the decline and fall of the Mitanni kingdom, its former suzerain, which allowed

17284-522: The rise of the Middle Assyrian Empire. The success of Assyria was not only due to energetic kings who expanded its borders but more importantly due to its ability to efficiently incorporate and govern conquered lands. From the rise of Assyria as a territorial state at the beginning of the Middle Assyrian period onward, Assyrian territory was divided into a set of provinces or districts ( pāḫutu ). The total number and size of these provinces varied and changed as Assyria expanded and contracted. Every province

17433-632: The royal palace of Tiryns , Greece, which dates roughly to 1400 to 1200 BC. Lime mortars were used in Greece, such as in Crete and Cyprus, in 800 BC. The Assyrian Jerwan Aqueduct (688 BC) made use of waterproof concrete . Concrete was used for construction in many ancient structures. Mayan concrete at the ruins of Uxmal (AD 850–925) is referenced in Incidents of Travel in the Yucatán by John L. Stephens . "The roof

17582-424: The services of others on their own accord, and were in turn provided with clothes and rations. Many of them probably originated as foreigners. Though similar to slavery, it was possible for an unfree person to regain their freedom by providing a replacement and they were during their service considered the property of the government rather than their employers. Other lower classes of the Middle Assyrian period included

17731-602: The smaller kingdoms of Mitanni and Kassite Babylonia to rise in the north and south, respectively. Around c. 1430 BC, Assur was subjugated by Mitanni, an arrangement that lasted for about 70 years, until c. 1360 BC. Another Hittite invasion by Šuppiluliuma I in the 14th century BC effectively crippled the Mitanni kingdom. After his invasion, Assyria succeeded in freeing itself from its suzerain, achieving independence once more under Ashur-uballit I ( r.   c. 1363–1328 BC) whose rise to power, independence, and conquests of neighboring territory traditionally marks

17880-411: The strength of the concrete bonding to resist tension. The long-term durability of Roman concrete structures has been found to be due to its use of pyroclastic (volcanic) rock and ash, whereby the crystallization of strätlingite (a specific and complex calcium aluminosilicate hydrate) and the coalescence of this and similar calcium–aluminium-silicate–hydrate cementing binders helped give the concrete

18029-475: The supreme judicial authority in the empire, though they generally appear to have been less concerned with their role as judges than their predecessors in the Old Assyrian period were. The kings were expected to ensure the welfare and prosperity of the Assyria and its people, indicated by multiple inscriptions referring to the kings as "shepherds" ( re’û ). No word for the idea of a capital city existed in Akkadian,

18178-497: The surface of concrete for a decorative "exposed aggregate" finish, popular among landscape designers. Admixtures are materials in the form of powder or fluids that are added to the concrete to give it certain characteristics not obtainable with plain concrete mixes. Admixtures are defined as additions "made as the concrete mix is being prepared". The most common admixtures are retarders and accelerators. In normal use, admixture dosages are less than 5% by mass of cement and are added to

18327-535: The surfaces of the aggregate together, and is typically the most expensive component. Thus, variation in sizes of the aggregate reduces the cost of concrete. The aggregate is nearly always stronger than the binder, so its use does not negatively affect the strength of the concrete. Redistribution of aggregates after compaction often creates non-homogeneity due to the influence of vibration. This can lead to strength gradients. Decorative stones such as quartzite , small river stones or crushed glass are sometimes added to

18476-441: The temples but the situation was reversed in the new capitals. Sargon II transferred the capital in 706 BC to the city Dur-Sharrukin, which he built himself. Since the location of Dur-Sharrukin had no obvious practical or political merit, this move was probably an ideological statement. Immediately after Sargon II's death in 705 BC, his son Sennacherib transferred the capital to Nineveh, a far more natural seat of power. Though it

18625-421: The time of Ashur-resh-ishi I onward, the religious and cultic duties of the king were pushed somewhat into the background, though they were still prominently mentioned in accounts of building and restoring temples. Assyrian titles and epithets in inscriptions from then on generally emphasized the kings as powerful warriors. Developing from their role in the Old Assyrian period, the Middle and Neo-Assyrian kings were

18774-573: The time of the Neo-Babylonian and later Achaemenid Empire , Assyria remained a marginal and sparsely populated region. Toward the end of the 6th century BC, the Assyrian dialect of the Akkadian language went extinct, having toward the end of the Neo-Assyrian Empire already largely been replaced by Aramaic as a vernacular language. Under the empires succeeding the Neo-Babylonians, from the late 6th century BC onward, Assyria began to experience

18923-413: The upper classes of ancient Assyria survives than for the lower ones. At the top of Middle and Neo-Assyrian society were members of long-established and large families called "houses". Members of this aristocracy tended to occupy the most important offices within the government and they were likely descendants of the most prominent families of the Old Assyrian period. One of the most influential offices in

19072-655: The various ingredients used to produce a given quantity of concrete, the cement is the most energetically expensive. Even complex and efficient kilns require 3.3 to 3.6 gigajoules of energy to produce a ton of clinker and then grind it into cement . Many kilns can be fueled with difficult-to-dispose-of wastes, the most common being used tires. The extremely high temperatures and long periods of time at those temperatures allows cement kilns to efficiently and completely burn even difficult-to-use fuels. The five major compounds of calcium silicates and aluminates comprising Portland cement range from 5 to 50% in weight. Combining water with

19221-552: The vassalization of the Levant all the way to the Egyptian border and the 729 BC conquest of Babylonia . The Neo-Assyrian Empire reached the height of its extent and power under the Sargonid dynasty , founded by Sargon II ( r.   722–705 BC). Under Sargon II and his son Sennacherib ( r.   705–681 BC), the empire was further expanded and the gains were consolidated. Both kings founded new capitals. Sargon II moved

19370-439: The water content or adding chemical admixtures increases concrete workability. Excessive water leads to increased bleeding or segregation of aggregates (when the cement and aggregates start to separate), with the resulting concrete having reduced quality. Changes in gradation can also affect workability of the concrete, although a wide range of gradation can be used for various applications. An undesirable gradation can mean using

19519-532: The western border province Quwê to the Assyrian heartland, a distance of 700 kilometers (430 miles) over a stretch of lands featuring many rivers without any bridges, could take less than five days to arrive. Such communication speed was unprecedented before the rise of the Neo-Assyrian Empire and was not surpassed in the Middle East until the telegraph was introduced by the Ottoman Empire in 1865, nearly two and

19668-515: Was Smeaton's Tower , built by British engineer John Smeaton in Devon , England, between 1756 and 1759. This third Eddystone Lighthouse pioneered the use of hydraulic lime in concrete, using pebbles and powdered brick as aggregate. A method for producing Portland cement was developed in England and patented by Joseph Aspdin in 1824. Aspdin chose the name for its similarity to Portland stone , which

19817-468: Was also sometimes called Atūria or Āthōr . In Syriac, Assyria was and is referred to as ʾĀthor . Agricultural villages in the region that would later become Assyria are known to have existed by the time of the Hassuna culture , c. 6300–5800 BC. Though the sites of some nearby cities that would later be incorporated into the Assyrian heartland, such as Nineveh , are known to have been inhabited since

19966-633: Was an intrinsic part of nearly every society in the ancient Near East. There were two main types of slaves in ancient Assyria: chattel slaves , primarily foreigners who were kidnapped or who were spoils of war, and debt slaves , formerly free men and women who had been unable to pay off their debts. In some cases, Assyrian children were seized by authorities due to the debts of their parents and sold off into slavery when their parents were unable to pay. Children born to slave women automatically became slaves themselves, unless some other arrangement had been agreed to. Though Old Babylonian texts frequently mention

20115-445: Was cast as a moral and necessary duty. Because the rule and actions of the Assyrian king were seen as divinely sanctioned, resistance to Assyrian sovereignty in times of war was regarded to be resistance against divine will, which deserved punishment. Peoples and polities who revolted against Assyria were seen as criminals against the divine world order. Since Ashur was the king of the gods, all other gods were subjected to him and thus

20264-406: Was elected from the influential men of Assyria. The limmu official gave their name to the year, meaning that their name appeared in all administrative documents signed that year. Kings were typically the limmu officials in their first regnal years. In the Old Assyrian period, the limmu officials also held substantial executive power, though this aspect of the office had disappeared by the time of

20413-469: Was established in the Neo-Assyrian Empire, dubbed the kiṣir šarri ("king's unit"). Some professional (though not standing) troops are also attested in the Middle Assyrian period, dubbed ḫurādu or ṣābū ḫurādātu , though what their role was is not clear due to the scarcity of sources. Perhaps this category included archers and charioteers , who needed more extensive training than normal foot soldiers . The Assyrian army developed and evolved over time. In

20562-601: Was followed by inter-dynastic conflict and a significant drop in Assyrian power. Tukulti-Ninurta I's successors were unable to maintain Assyrian power and Assyria became increasingly restricted to just the Assyrian heartland, a period of decline broadly coinciding with the Late Bronze Age collapse . Though some kings in this period of decline, such as Ashur-dan I ( r.   c. 1178–1133 BC), Ashur-resh-ishi I ( r.   1132–1115 BC) and Tiglath-Pileser I ( r.   1114–1076 BC) worked to reverse

20711-660: Was frequently threatened by larger foreign states and kingdoms. The original Assur city-state, and the Puzur-Ashur dynasty, came to an end c. 1808 BC when the city was conquered by the Amorite ruler of Ekallatum , Shamshi-Adad I . Shamshi-Adad's extensive conquests in northern Mesopotamia eventually made him the ruler of the entire region, founding what some scholars have termed the " Kingdom of Upper Mesopotamia ". The survival of this realm relied chiefly on Shamshi-Adad's own strength and charisma and it thus collapsed shortly after his death c. 1776 BC. After Shamshi-Adad's death,

20860-602: Was greatly reduced. Low kiln temperatures in the burning of lime, lack of pozzolana, and poor mixing all contributed to a decline in the quality of concrete and mortar. From the 11th century, the increased use of stone in church and castle construction led to an increased demand for mortar. Quality began to improve in the 12th century through better grinding and sieving. Medieval lime mortars and concretes were non-hydraulic and were used for binding masonry, "hearting" (binding rubble masonry cores) and foundations. Bartholomaeus Anglicus in his De proprietatibus rerum (1240) describes

21009-411: Was headed by a provincial governor ( bel pāḫete , bēl pīhāti or šaknu ) who was responsible for handling local order, public safety and economy. Governors also stored and distributed the goods produced in their province, which were inspected and collected by royal representatives once a year. Through these inspections, the central government could keep track of current stocks and production throughout

21158-419: Was however not maintained as capital after Tukulti-Ninurta I's death, with subsequent kings once more ruling from Assur. The Neo-Assyrian Empire underwent several different capitals. There is some evidence that Tukulti-Ninurta II ( r.   890–884 BC), perhaps inspired by his predecessor of the same name, made unfulfilled plans to transfer the capital to a city called Nemid Tukulti-Ninurta , either

21307-420: Was inherited by her children after her death. Although they were equal legally, men and women in the Old Assyrian period were raised and socialized differently and had different social expectations and obligations. Typically, girls were raised by their mothers, taught to spin, weave, and help with daily tasks and boys were taught trades by masters, later often following their fathers on trade expeditions. Sometimes

21456-435: Was mainly used for escorting or message deliveries. Under the Neo-Assyrian Empire, important new developments in the military were the large-scale introduction of cavalry, the adoption of iron for armor and weapons, and the development of new and innovative siege warfare techniques. At the height of the Neo-Assyrian Empire, the Assyrian army was the strongest army yet assembled in world history. The number of soldiers in

21605-422: Was not meant as a permanent royal residence, Ashur-uballit II chose Harran as his seat of power after the fall of Nineveh in 612 BC. Harran is typically seen as the short-lived final Assyrian capital. No building projects were conducted during this time, but Harran had been long-established as a major religious center, dedicated to the god Sîn . Because of the nature of source preservation, more information about

21754-474: Was possible through steady service to the Assyrian state bureaucracy for a family to move up the social ladder; in some cases stellar work conducted by a single individual enhanced the status of their family for generations to come. In many cases, Assyrian family groups, or "clans", formed large population groups within the empire referred to as tribes. Such tribes lived together in villages and other settlements near or adjacent to their agricultural lands. Slavery

21903-614: Was quarried on the Isle of Portland in Dorset , England. His son William continued developments into the 1840s, earning him recognition for the development of "modern" Portland cement. Reinforced concrete was invented in 1849 by Joseph Monier . and the first reinforced concrete house was built by François Coignet in 1853. The first concrete reinforced bridge was designed and built by Joseph Monier in 1875. Prestressed concrete and post-tensioned concrete were pioneered by Eugène Freyssinet ,

22052-481: Was restored in the 2nd century AD. This last cultural golden age came to an end with the sack of Assur by the Sasanian Empire c. 240. During the sack, the Ashur temple was destroyed again and the city's population was dispersed. Starting from the 1st century AD onward, many of the Assyrians became Christianized , though holdouts of the old ancient Mesopotamian religion continued to survive for centuries. Despite

22201-452: Was the first to assume the style šar māt Aššur ("king of the land of Ashur") and his grandson Arik-den-ili ( r.   c. 1317–1306 BC) introduced the style šarru dannu ("strong king"). Adad-nirari I's inscriptions required 32 lines to be devoted just to his titles. This development peaked under Tukulti-Ninurta I, who assumed, among other titles, the styles "king of Assyria and Karduniash ", " king of Sumer and Akkad ", "king of

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