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Gunnite
Shotcrete, gunite (), or sprayed concrete is concrete or mortar conveyed through a hose and pneumatically projected at high velocity onto a surface, as a construction technique, first used in 1907 invented by Carl Akeley. It is typically reinforced by conventional steel rods, steel mesh, or fibers. Shotcrete is usually an all-inclusive term for both the wet-mix and dry-mix versions invented by Akeley. In pool construction, however, ''shotcrete'' refers to wet mix and ''gunite'' to dry mix. In this context, these terms are not interchangeable. Shotcrete is placed and compacted/consolidated at the same time, due to the force with which it is ejected from the nozzle. It can be sprayed onto any type or shape of surface, including vertical or overhead areas. Shotcrete has the characteristics of high compressive strength, good durability, water tightness and frost resistance. History Shotcrete, then known as gunite, was invented in 1907 by American taxidermist Carl Akeley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cement Gun Sydney Water Photograph Collection A-00069917
{{disambiguation, geo ...
Early may refer to: History * The beginning or oldest part of a defined historical period, as opposed to middle or late periods, e.g.: ** Early Christianity ** Early modern Europe Places in the United States * Early, Iowa * Early, Texas * Early Branch, a stream in Missouri * Early County, Georgia Other uses * ''Early'' (Scritti Politti album), 2005 * ''Early'' (A Certain Ratio album), 2002 * Early (name) * Early effect, an effect in transistor physics * Early Records, a record label * the early part of the morning See also * Earley (other) Earley is a town in England. Earley may also refer to: * Earley (surname), a list of people with the surname Earley * Earley (given name), a variant of the given name Earlene * Earley Lake, a lake in Minnesota *Earley parser, an algorithm *Earley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cement
A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel ( aggregate) together. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete. Concrete is the most widely used material in existence and is behind only water as the planet's most-consumed resource. Cements used in construction are usually inorganic, often lime or calcium silicate based, which can be characterized as hydraulic or the less common non-hydraulic, depending on the ability of the cement to set in the presence of water (see hydraulic and non-hydraulic lime plaster). Hydraulic cements (e.g., Portland cement) set and become adhesive through a chemical reaction between the dry ingredients and water. The chemical reaction results in mineral hydrates that are not very water-soluble and so are quite durable in wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underground Mining (hard Rock)
Underground hard-rock mining refers to various underground mining techniques used to excavate "hard" minerals, usually those containing metals, such as ore containing gold, silver, iron, copper, zinc, nickel, tin, and lead. It also involves the same techniques used to excavate ores of gems, such as diamonds and rubies. Soft-rock mining refers to the excavation of softer minerals, such as salt, coal, and oil sands. Mine access Underground access Accessing underground ore can be achieved via a decline (ramp), inclined vertical shaft or adit. *Declines can be a spiral tunnel which circles either the flank of the deposit or circles around the deposit. The decline begins with a box cut, which is the portal to the surface. Depending on the amount of overburden and quality of bedrock, a galvanized steel culvert may be required for safety purposes. They may also be started into the wall of an open cut mine. *Shafts are vertical excavations sunk adjacent to an ore body. Shafts are s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth Anchor
An earth anchor is a device designed to support structures, most commonly used in Geotechnical engineering, geotechnical and construction applications. Also known as a ground anchor, percussion driven earth anchor or mechanical anchor, it may be impact driven into the ground or run in spirally, depending on its design and intended force-resistance characteristics. Earth anchors are used in both temporary or permanent applications, including supporting retaining walls, guyed masts, and circus tents. History The first practical earth anchor was invented in 1912 by Albert Bishop Chance in Centralia, Missouri, in response to an ice storm that knocked down his company’s telephone poles. The town of Centralia holds an annual Anchor Day Festival. Applications Earth anchors are typically used in civil engineering and construction projects, and have a variety of applications, including: * Retaining walls, as part of erosion control systems. * Structural support of temporary buildi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norwegian Public Roads Administration
The Norwegian Public Roads Administration ( no, Statens vegvesen) is a Norwegian government agency responsible for national and county public roads in Norway. This includes planning, construction and operation of the national and county road networks, driver training and licensing, vehicle inspection, and subsidies to car ferries. The agency is led by the Directorate of Public Roads (Vegdirektoratet), and is subordinate to the Ministry of Transport and Communications. The Norwegian Public Roads Administration is divided into five regions and thirty districts, which are subordinate to the directorate. The directorate is based in Oslo. The Norwegian Public Roads Administration is one of the largest government agencies of Norway in terms of budget. In matters concerning national roads, the agency is subordinate to the ministry and in matters concerning county roads subordinate to the county administration. Core activities The Norwegian Public Roads Administration strives to ensure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teknisk Ukeblad
''Teknisk Ukeblad'' (''TU'', en, Technical Weekly Magazine) is a Norwegian engineering magazine. The magazine has its headquarters in Oslo, Norway. History and profile ''TU'' has appeared weekly since 13 April 1883 and was published by Ingeniørforlaget, now Teknisk Ukeblad Media jointly owned by three national professional associations of engineers and architects: the Norwegian Society of Engineers and Technologists (NITO, founded 1936), Tekna (founded in 1874), and the Norwegian Polytechnic Society (PF, founded 1852). On 24 June 2010 ''TU'' had a total circulation of 302,000 weekly copies. Corresponding publications are '' Ny Teknik'' in Sweden, ''Ingeniøren'' in Denmark and ''Technisch Weekblad'' in the Netherlands. References External links Teknisk Ukeblad the magazine's websiteTeknisk Ukeblad some older volumes digitized by Project Runeberg Project Runeberg ( sv, Projekt Runeberg) is a digital cultural archive initiative that publishes free electronic versions of b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Istanbul
Istanbul ( , ; tr, İstanbul ), formerly known as Constantinople ( grc-gre, Κωνσταντινούπολις; la, Constantinopolis), is the List of largest cities and towns in Turkey, largest city in Turkey, serving as the country's economic, cultural and historic hub. The city straddles the Bosporus strait, lying in both Europe and Asia, and has a population of over 15 million residents, comprising 19% of the population of Turkey. Istanbul is the list of European cities by population within city limits, most populous European city, and the world's List of largest cities, 15th-largest city. The city was founded as Byzantium ( grc-gre, Βυζάντιον, ) in the 7th century BCE by Ancient Greece, Greek settlers from Megara. In 330 CE, the Roman emperor Constantine the Great made it his imperial capital, renaming it first as New Rome ( grc-gre, Νέα Ῥώμη, ; la, Nova Roma) and then as Constantinople () after himself. The city grew in size and influence, eventually becom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fireproofing
Fireproofing is rendering something (structures, materials, etc.) resistant to fire, or incombustible; or material for use in making anything fire-proof. It is a passive fire protection measure. "Fireproof" or "fireproofing" can be used as a noun, verb or adjective; it may be hyphenated ("fire-proof"). Applying a certification listed fireproofing system to certain structures allows them to have a fire-resistance rating. The term "fireproofing" may be used in conjunction with standards, as reflected in common North American construction specifications. An item classed as fireproof is resistant in specified circumstances, and may burn or be rendered inoperable by fire exceeding the intensity or duration that it is designed to withstand. Markets * Commercial construction * Residential construction * Industrial construction * Marine (ships) * Offshore construction * Aerodynamics * Tunnel concrete walls and ceilings or linings * Under- and above-ground mining operations Applicati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortar (masonry)
Mortar is a workable paste which hardens to bind building blocks such as stones, bricks, and concrete masonry units, to fill and seal the irregular gaps between them, spread the weight of them evenly, and sometimes to add decorative colors or patterns to masonry walls. In its broadest sense, mortar includes pitch, asphalt, and soft mud or clay, as those used between mud bricks, as well as cement mortar. The word "mortar" comes from Old French ''mortier'', "builder's mortar, plaster; bowl for mixing." (13c.). Cement mortar becomes hard when it cures, resulting in a rigid aggregate structure; however, the mortar functions as a weaker component than the building blocks and serves as the sacrificial element in the masonry, because mortar is easier and less expensive to repair than the building blocks. Bricklayers typically make mortars using a mixture of sand, a binder, and water. The most common binder since the early 20th century is Portland cement, but the ancient binder lim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allentown Equipment
Allentown may refer to several places in the United States and topics related to them: *Allentown, California, now called Toadtown, California *Allentown, Georgia, a town in Wilkinson County * Allentown, Illinois, an unincorporated community in Tazewell County *Allentown, New Jersey, a borough in Monmouth County * Allentown, New York (other) **Allentown, a hamlet in the town of Alma, New York in Allegany County **Allentown, a hamlet in the town of Hadley, New York in Saratoga County **Allentown, Buffalo, a neighborhood in Buffalo, New York * Allentown, Ohio, an unincorporated community *Allentown, Allegheny County, Pennsylvania, a suburb of Pittsburgh, Pennsylvania *Allentown, Pennsylvania, a city in eastern Pennsylvania **Allentown-Bethlehem-Easton metropolitan area, a metropolitan area also known as the Lehigh Valley ** "Allentown" (song), by American singer Billy Joel (1982) about Allentown, Pennsylvania **"Allentown Jail", a folk-style song written by American Irving Gor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
