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The companies denied the claim, saying competition had actually brought prices down from $4 to $5 a barrel a few years earlier, when most cement was imported from elsewhere. [25] California Portland Cement was again accused of conspiring to fix cement prices in a 1980 lawsuit, along with about 50 other defendants.
Portland cement had been imported into the United States from Germany and England, and in the 1870s and 1880s, it was being produced by Eagle Portland cement near Kalamazoo, Michigan. In 1875, the first portland cement was produced in the Coplay Cement Company Kilns under the direction of David O. Saylor in Coplay, Pennsylvania. [11]
The plant at Clarkdale in 2013. The Phoenix Cement Company, headquartered in Phoenix, operates a cement plant in Clarkdale in the U.S. state of Arizona.Built in 1959 by the American Cement Company to make cement for construction of the Glen Canyon Dam on the Colorado River, the Clarkdale plant produces Portland cement, fly ash, and gypsum for a regional market.
Blue Circle Industries was a British public company manufacturing cement. [1] It was founded in 1900 as the Associated Portland Cement Manufacturers Ltd. through the fusion of 24 cement works, mostly around on the Thames and Medway estuaries, together having around a 70% market share of the British cement market.
Eco-Cement is a brand-name for a type of cement which incorporates reactive magnesia (sometimes called caustic calcined magnesia or magnesium oxide, MgO), another hydraulic cement such as Portland cement, and optionally pozzolans and industrial by-products, to reduce the environmental impact relative to conventional cement.
Gypsum concrete is lightweight and fire-resistant. A 1.5-inch slab of gypsum concrete weighs 13 pounds per square foot versus 18 pounds per square foot for regular concrete. [10] Even though gypsum concrete weighs less, it still has the same compressive strength as regular concrete, based on its application as underlayment or top coat flooring ...
Taiheiyo Cement was created through a series of mergers and acquisitions dating back to the establishment of the Cement Manufacturing Company (later renamed the Onoda Cement Company) in 1881. [5] Onoda Cement purchased California Portland Cement Company from the CalMat Company in 1990 for $316 million, [ 5 ] [ 6 ] after having acquired a 19% ...
Polymer concrete is a type of concrete that uses a polymer to replace lime-type cements as a binder. One specific type is epoxy granite , where the polymer used is exclusively epoxy . In some cases the polymer is used in addition to portland cement to form Polymer Cement Concrete (PCC) or Polymer Modified Concrete (PMC). [ 1 ]