• Portland cement Encyclopedia Britannica

    Portland cement, binding material in the form of a finely ground powder, usually gray, that is manufactured by burning and grinding a mixture of limestone and clay or limestone and shale.The inventor Joseph Aspdin, of England, patented the basic process in 1824, naming it for the resemblance of the cement when set to portland stone, a limestone from the Isle of Portland.

  • Cement Encyclopedia Britannica Britannica

    Cement Cement The major cements: composition and properties: Portland cement is made up of four main compounds: tricalcium silicate (3CaO · SiO2), dicalcium silicate (2CaO · SiO2), tricalcium aluminate (3CaO · Al2O3), and a tetra-calcium aluminoferrite (4CaO · Al2O3Fe2O3). In an abbreviated notation differing from the normal atomic symbols, these compounds are designated as C3S, C2S

  • Lehigh Portland Cement Company Encyclopedia

    Lehigh Portland Cement Company 7660 Imperial WayAllentown, Pennsylvania 18195U.S.A.(610) 366-4600 (610) 366-4680 Wholly Owned Subsidiary of Heidelberger Zement A.GIncorporated: 1897Employees: 6,000Sales: $1.2 billion (1997 est.)SICs: 3241 Cement, Hydraulic; 3271 Concrete Block & Brick; 3272 Concrete Products, Except Block & Brick; 3273 Ready-Mixed Concrete Source for

  • Portland Cement an overview ScienceDirect Topics

    Vivek Bindiganavile, Meghdad Hoseini, in Developments in the Formulation and Reinforcement of Concrete (Second Edition), 2019. 16.3.1 Portland cement. Portland cement is the main cementitious component of foamed concrete. It has been used at dosages varying from as high as 1400 kg/m 3 to as low as 75 kg/m 3 but in pract, usually between 300 and 500 kg/m 3 (ACI 523.1R-06, 2006; British

  • Cement Encyclopedia

    Cement made at Rosendale, New York, was the most famous, but that made at Coplay, Pennsylvania, the most significant, because it became the first American Portland cement. Portland cement, made by burning and pulverizing briquets of an artificial mixture of limestone (chalk) and clay, was so named because the hardened cement resembled a well

  • Cement History of cement Encyclopedia Britannica

    Cement Cement History of cement: The origin of hydraulic cements goes back to ancient Greece and Rome. The materials used were lime and a volcanic ash that slowly reacted with it in the presence of water to form a hard mass. This formed the cementing material of the Roman mortars and concretes of 2,000 years ago and of subsequent construction in western Europe.

  • Cement Encyclopedia Britannica Britannica

    Oct 19, 2020· Cement, in general, adhesive substances of all kinds, but, in a narrower sense, the binding materials used in building and civil engineering construction. Cements of this kind are finely ground powders that, when mixed with water, set to a hard mass.Setting and hardening result from hydration, which is a chemical combination of the cement compounds with water that yields

  • Wholesale Portland Cement Portland Cement Manufacturers

    Wholesale Portland Cement ☆ Find 268 portland cement products from 136 manufacturers & suppliers at EC21. ☆ Choose quality portland cement manufacturers, suppliers & exporters now EC21

  • Unbranded 94 lb. Portland Cement-112494 The Home Depot

    OverviewReviewsQUIKRETE 94 lb. Portland Cement is a high strength cement designed for a number of different applications. It can be mixed with aggregate to make base-coat stucco, concrete and mortar. QUIKRETE 94 lb. Portland Cement is a commercial grade cement that can handle any number of heavy applications; including structural construction and repair.
  • Cement Encyclopedia Britannica Britannica

    Cement Cement The major cements: composition and properties: Portland cement is made up of four main compounds: tricalcium silicate (3CaO · SiO2), dicalcium silicate (2CaO · SiO2), tricalcium

  • Portland Cement Article about Portland Cement by The

    portland cement[′pȯrt·lənd si′ment] (materials) A hydraulic cement made of pulverized, calcined argillaceous and calcareous materials; the proper name for ordinary cement. Portland cement Building material made from limestone, gypsum, and shale or clay that, when mixed with water, binds sand and gravel into concrete. Portland cement

  • Portland Cement Association WikiMili, The Free Encyclopedia

    Aug 27, 2019· 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

  • Portland cement Academic Kids

    Portland cement is the most common type of cement in general usage, as it is a basic ingredient of concrete and mortar.It consists of a mixture of oxides of calcium, silicon and aluminum.Portland cement

  • Portland Cement an overview ScienceDirect Topics

    Vivek Bindiganavile, Meghdad Hoseini, in Developments in the Formulation and Reinforcement of Concrete (Second Edition), 2019. 16.3.1 Portland cement. Portland cement is the main

  • Portland Cement Works Precinct Wikipedia

    Portland Cement Works Precinct is a heritage-listed former cement s and limestone quarries and now disused industrial site at Williwa Street, Portland, City of Lithgow, New South Wales, Australia.It was designed and built in various stages from 1890 to 2003. It is also known as Portland Cement Group and Commonwealth Portland Cement