Portland Cement

Portland Cement PORTLAND CEMENT Chemical composition. Portland Cement is made up of four main compounds: tri atomic number 20 silicate (3CaOSiO2), dicalcium silicate (2CaOSiO2), tricalcium aluminate (3CaOAl2O3), and a tetra-calcium aluminoferrite (4CaO Al2O3Fe2O3). In an abbreviated line differing from the normal atomic symbols, these compounds are designated as C3S, C2S, C3A, and C4AF, where C stands for calcium oxide (lime), S for silica, A for alumina, and F for iron oxide. Small amounts of uncompounded lime and magnesia also are present, along with alkalies and pincer amounts of other elements Hydration.

The most important hydraulic constituents are the calcium silicates, C2S and C3S. Upon mixing with water, the calcium silicates react with water molecules to form calcium silicate hydrate (3CaO 2SiO23H2O) and calcium hydroxide (Ca [OH] 2). These compounds are given the tachygraphy notations C-S-H (represented by the average formula C3S2H3) and CH, and the Hydration reaction can b...If you motivation to get a full essay, order it on our website: Orderessay

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