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In October 2009, a cement and concrete price fixing class action lawsuit was filed in Florida against Oldcastle Materials and others. The claim alleged that the defendants eliminated competition in the market for cement and concrete by charging artificially high prices from at least the period 2000 to 2009.
Other cement bound materials (CBM), with less strength but also lower cost, are used. They are rated by strength, from the weakest CBM 1 (also formerly known as soil cement) through CBM 2 to CBM 3, 4, and 5, which are more similar to concrete and are called "lean mix". In the UK, the specification for aggregate used as a subbase in the ...
The Operative Plasterers' and Cement Masons' International Association of the United States and Canada (OPCMIA) is a trade union of plasterers and cement masons in the construction industry in the United States and Canada. Members of the union finish interior walls and ceilings of buildings and apply plaster on masonry, metal, and wire lath or ...
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Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin , and is usually made from limestone .
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George Bartholomew was an American inventor who is credited with the invention of concrete pavement. In 1886, Bartholomew moved to Bellefontaine, Ohio, after having learned about cement production. Bartholomew found a good source of limestone and clay in the area; from this, he hoped to create an artificial stone for paving.