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History. Self-leveling concrete was invented in 1952 by Axel Karlsson from Sweden. The first product was a combination of wood glue, fine sand and cement with additives. [1] It was called flytspackel, which directly translates to "floating putty". The term self-leveling can be traced back to a patent applied by the company Lafarge in 1997. [2]
The National Tile Contractors Association (NTCA) is a nonprofit trade association dedicated to the professional installation of ceramic tile and natural stone, established in 1947. [1] The NTCA aims to improve the industry through education and training, participation in the development of standards and methods.
Tilt up. A finished tilt-up building. Tilt-up, tilt-slab or tilt-wall is a type of building and a construction technique using concrete. Though it is a cost-effective technique with a shorter completion time, [ 1] poor performance in earthquakes has mandated significant seismic retrofit requirements in older buildings. [ 2]
Concrete leveling. In civil engineering, concrete leveling is a procedure that attempts to correct an uneven concrete surface by altering the foundation that the surface sits upon. It is a cheaper alternative to having replacement concrete poured and is commonly performed at small businesses and private homes as well as at factories, warehouses ...
The first residential building of slipform construction; erected in 1950 in Västertorp, Sweden, by AB Bygging Later picture of the residential building in Västertorp. Slip forming, continuous poured, continuously formed, or slipform construction is a construction method in which concrete is placed into a form that may be in continuous motion horizontally, or incrementally raised vertically.
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With $48.666 billion in business with the U.S. federal government, Lockheed Martin, based in Bethesda, Maryland, is the largest U.S. federal government contractor. The Top 100 Contractors Report ( TCR 100) is a list developed annually by the General Services Administration as part of its tracking of U.S. federal government procurement.
The following is a list of trades in construction . Boilermaker, works in nuclear, oil and gas industry, shipyards, refineries, and chemical plants, on boilers, pressure vessels, and similar equipment. Carpenter, a craftsperson who performs carpentry, building mainly with wood. [1] Among carpentry's subsidiary trades are those of cabinet maker ...