Definitions and general points

The calcium silicate hydrate formed on paste hydration of C3S or P-CjS is a particular variety of C-S-H, which is a generic name for any amorphous 

This chapter deals primarily with the reactions and products of hydration of CjS and P-C2S in pastes at ordinary temperatures. Except where stated, a temperature of 15-25 C is assumed. Background information has been obtained from studies of C S or P-CjS hydration at higher w/s ratios, i.e. in aqueous suspensions, or on C-S -H prepared in other ways, and the results of such studies are also considered. 

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