Portland Cement

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Title: Portland Cement

Essay Details:

Subject: Miscellaneous

Author:

Date: April 17, 2014

Level: University

Grade: A

Length: 5 / 1479

Essay text:

Small amounts of uncombined lime and magnesia also are present, along with alkalies and minor 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 shorthand notations C-S-H (represented by the average formula C3S2H3) and CH, and the Hydration reaction can be crudely represented by the following reactions: 2C3S + 6H = C3S2H3 + 3CH 2C2S + 4H = C3S2H3 + CH During the initial stage of hydration, the parent compounds dissolve, and the dissolution of their chemical bonds generates a significant amount of heat...

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