|
Reinforced Concrete Structures
Reinforced concrete (RC), also called reinforced cement concrete (RCC) and ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials. In corrosion engineering terms, when designed correctly, the alkalinity of the concrete protects the steel rebar from corrosion. Description Reinforcing schemes are generally designed to resist tensile stresses in particular regions of the concrete that might cause unacceptable cracking and/or structural failure. Modern reinforced concrete can contain varied reinforcing materials ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Composite Material
A composite material (also called a composition material or shortened to composite, which is the common name) is a material which is produced from two or more constituent materials. These constituent materials have notably dissimilar chemical or physical properties and are merged to create a material with properties unlike the individual elements. Within the finished structure, the individual elements remain separate and distinct, distinguishing composites from mixtures and solid solutions. Typical engineered composite materials include: *Reinforced concrete and masonry *Composite wood such as plywood *Reinforced plastics, such as fibre-reinforced polymer or fiberglass *Ceramic matrix composites ( composite ceramic and metal matrices) *Metal matrix composites *and other advanced composite materials There are various reasons where new material can be favoured. Typical examples include materials which are less expensive, lighter, stronger or more durable when compared with commo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strength Of Materials
The field of strength of materials, also called mechanics of materials, typically refers to various methods of calculating the stresses and strains in structural members, such as beams, columns, and shafts. The methods employed to predict the response of a structure under loading and its susceptibility to various failure modes takes into account the properties of the materials such as its yield strength, ultimate strength, Young's modulus, and Poisson's ratio. In addition, the mechanical element's macroscopic properties (geometric properties) such as its length, width, thickness, boundary constraints and abrupt changes in geometry such as holes are considered. The theory began with the consideration of the behavior of one and two dimensional members of structures, whose states of stress can be approximated as two dimensional, and was then generalized to three dimensions to develop a more complete theory of the elastic and plastic behavior of materials. An important founding pion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roman Empire
The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post-Republican period of ancient Rome. As a polity, it included large territorial holdings around the Mediterranean Sea in Europe, North Africa, and Western Asia, and was ruled by emperors. From the accession of Caesar Augustus as the first Roman emperor to the military anarchy of the 3rd century, it was a Principate with Italia as the metropole of its provinces and the city of Rome as its sole capital. The Empire was later ruled by multiple emperors who shared control over the Western Roman Empire and the Eastern Roman Empire. The city of Rome remained the nominal capital of both parts until AD 476 when the imperial insignia were sent to Constantinople following the capture of the Western capital of Ravenna by the Germanic barbarians. The adoption of Christianity as the state church of the Roman Empire in AD 380 and the fall of the Western ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultimate Tensile Strength
Ultimate tensile strength (UTS), often shortened to tensile strength (TS), ultimate strength, or F_\text within equations, is the maximum stress that a material can withstand while being stretched or pulled before breaking. In brittle materials the ultimate tensile strength is close to the yield point, whereas in ductile materials the ultimate tensile strength can be higher. The ultimate tensile strength is usually found by performing a tensile test and recording the engineering stress versus strain. The highest point of the stress–strain curve is the ultimate tensile strength and has units of stress. The equivalent point for the case of compression, instead of tension, is called the compressive strength. Tensile strengths are rarely of any consequence in the design of ductile members, but they are important with brittle members. They are tabulated for common materials such as alloys, composite materials, ceramics, plastics, and wood. Definition The ultimate tensile strength ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Monier
Joseph Monier (; 8 November 1823, Saint-Quentin-la-Poterie, France – 13 March 1906, Paris) was a French gardener and one of the principal inventors of reinforced concrete. Overview As a gardener, Monier was not satisfied with the materials available for making flowerpots. Clay was easily broken and wood weathered badly and could be broken by the plant roots. Monier began making concrete pots and tubs, but these were not stable enough. In order to strengthen the concrete containers, he experimented with embedded iron mesh. He was not the first to experiment with reinforced concrete, but he saw some of the possibilities in the technique, and promoted it extensively. Monier exhibited his invention at the Paris Exposition of 1867. He obtained his first patent on 16 July 1867, on iron-reinforced troughs for horticulture. He continued to find new uses for the material, and obtained more patents — iron-reinforced concrete pipes and basins (1868); iron-reinforced concrete pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York And Long Island Coignet Stone Company Building
The Coignet Stone Company Building (also the Pippen Building) is a historical structure in the Gowanus neighborhood of Brooklyn in New York City, at the intersection of Third Street and Third Avenue. Designed by architects William Field and Son and constructed between 1872 and 1873, it is the city's oldest remaining concrete building. The Coignet Building is the last remaining structure of a five-acre concrete factory complex built for the Coignet Agglomerate Company along the Gowanus Canal. The building has a two-story cast-stone facade above a raised basement. The Coignet Building was created using a type of concrete patented by Frenchman François Coignet in the 1850s and manufactured at the Gowanus factory. The Coignet Agglomerate Company, for which the building was erected, was the first United States firm to manufacture Coignet stone. Despite the popularity of Coignet stone at the time of the building's construction, the Coignet Agglomerate Company completely shuttered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rue Charles Michels
''Ruta graveolens'', commonly known as rue, common rue or herb-of-grace, is a species of '' Ruta'' grown as an ornamental plant and herb. It is native to the Balkan Peninsula. It is grown throughout the world in gardens, especially for its bluish leaves, and sometimes for its tolerance of hot and dry soil conditions. It is also cultivated as a culinary herb, and to a lesser extent as an insect repellent and incense. Etymology The specific epithet ''graveolens'' refers to the strong-smelling leaves.J. D. Douglas and Merrill C. Tenney Description Rue is a woody, perennial shrub. Its leaves are oblong, blue green and arranged pinnate; they release a strong aroma when they are bruised. The flowers are small with 4 to 5 dull yellow petals in clusters. They bear brown seed capsules when pollinated. Uses Traditional use In the ancient Roman world, the naturalists Pedanius Dioscorides and Pliny the Elder recommended that rue be combined with the poisonous shrub oleander to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
François Coignet
François Coignet (10 February 1814 – 30 October 1888) was a French industrialist and a pioneer in the development of reinforced concrete as the first person to use iron-reinforced concrete to construct buildings.Day, p. 284 Biography Coignet, along with his brothers Louis (b. 1819) and Stephane (b. 1820), took over the family business, a chemical plant in Lyon, in 1846. In 1847, he built some concrete houses using poured cement that was not reinforced with iron. In 1850, Coignet married Clarisse Gauthier (1823-1918) and a year later, he settled in Saint-Denis, a commune near Paris, where in 1852 he opened a second plant and obtained a patent for cement clinker. Coignet then built a cement factory at Saint-Denis using exposed lime walls and followed the pisé de terre system, a rammed-earth method of construction. This was the first time he worked with this method in concrete. Later, he took out a patent in England entitled "''Emploi de Béton''", which gave details of h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akinfiy Nikitich Demidov
Akinfiy Nikitich Demidov (russian: Акинфий Никитич Демидов) (1678 Tula - 5 August 1745 Yatskoye Ustye, Menzelinsky Uyezd, Orenburg Governorate) was a Russian industrialist of the Demidov family. Life He was the eldest son of Nikita Demidov and increased the family fortune, raising it to one of Russia's most important industrial dynasties. He studied the secrets of metallurgical production in Saxony. He zealously set to work and became the creator of the "empire" of the Demidovs, which by the middle of the 18th century produced 52% of all Russian metal. He set up at least nine steel foundries and munitions factories from 1717 to 1735, and had 25 by his death. He also created iron and copper mines in the Urals and Western Siberia to supply them and mines for precious and semi-precious stones, silver and gold. In 1720, having bought from Nikolai Fedorovich Golovin an estate in the Barminskaya volost of the Nizhny Novgorod district, the Demidovs received a l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russia
Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the world, with its internationally recognised territory covering , and encompassing one-eighth of Earth's inhabitable landmass. Russia extends across Time in Russia, eleven time zones and shares Borders of Russia, land boundaries with fourteen countries, more than List of countries and territories by land borders, any other country but China. It is the List of countries and dependencies by population, world's ninth-most populous country and List of European countries by population, Europe's most populous country, with a population of 146 million people. The country's capital and List of cities and towns in Russia by population, largest city is Moscow, the List of European cities by population within city limits, largest city entirely within E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sverdlovsk Oblast
Sverdlovsk Oblast ( rus, Свердловская область, Sverdlovskaya oblast) is a federal subject (an oblast) of Russia located in the Ural Federal District. Its administrative center is the city of Yekaterinburg, formerly known as Sverdlovsk. Its population is 4,297,747 (according to the 2010 Census). Geography Most of the oblast is spread over the eastern slopes of the Middle and North Urals and the Western Siberian Plain. Only in the southwest does the oblast stretch onto the western slopes of the Ural Mountains. The highest mountains all rise in the North Urals, Konzhakovsky Kamen at and Denezhkin Kamen at . The Middle Urals is mostly hilly country with no discernible peaks; the mean elevation is closer to above sea level. Principal rivers include the Tavda, the Tura, the Chusovaya, and the Ufa, the latter two being tributaries of the Kama. Sverdlovsk Oblast borders with, clockwise from the west, Perm Krai, the Komi Republic, Khanty–Mansi Autonomous Okru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nevyansk
Nevyansk (russian: Невья́нск) is a town and the administrative center of Nevyansky District in Sverdlovsk Oblast, Russia, located on the Neyva River ( Ob's basin) on the eastern slope of the Middle Urals, north of Yekaterinburg. Population: 29,800 (1970). History The ''posad'' of Nevyansk was founded in 1700 due to the construction of a foundry and iron factory. Although it was not granted town status until 1919, it became highly important for the well-being of the Demidov family, which extracted gold from the local foothills. In the 18th century, Nevyansk was settled primarily by Old Believers, who commissioned from local artisans some glimmering, stylish icons which may be regarded as the last phase in the history of Russian icon-painting. As for the Demidovs, they commissioned the high Leaning Tower of Nevyansk, which was erected sometime between 1725 and 1740 and remains the town's principal landmark and claim to fame. Administrative and municipal status W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
