Sunday, 23 September 2018

Properties & Function of Bogue's Compounds

Properties & Function of Bogue's Compounds

The Bogue's compounds (basic compounds) of Ordinary Portland Cement and their function are given below

Bogue’s Compounds

% by mass of cement

Properties & Function of bogue’s compounds

Tri-calcium silicate (C3S)
25-50
It hydrates at faster rate and produce higher heat of hydration.It is responsible for rapid hardening with an early gain in strength & has less resistance to chemical attack.

 Di-calcium silicate(C2S)
 20-45
 It hydrates & hardens slowly and produces less heat of hydration.It provides much of the ultimate strength & has greater resistance to chemical attack.

 Tri-calcium aluminate(C3A)
 5-12
 It is the first compound which starts hydrating.It produces highest heat of hydration & responsible for setting of cement.

 Tetra-calcium alumino-ferrite (C4AF)
 6-12
 It hydrates rapidly but its individual contribution to overall strength of cement is insignificant.


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