Civil Engineering - Building Materials - Discussion
Discussion Forum : Building Materials - Section 1 (Q.No. 10)
10.
In the cement the compound quickest to react with water, is
Discussion:
33 comments Page 4 of 4.
Nilkant mishra said:
3 years ago
@Aman.
It is C4AF.
It is C4AF.
(2)
Er KT said:
3 years ago
According to me, C3A is the correct answer.
Amran Ali said:
9 months ago
Yes, the sequence of the rate of hydration and heat of hydration for the four main constituents of cement is C3A > C3S > C4AF > C2S.
Rate of hydration:
The rate of hydration for the four constituents of cement is C3A > C4AF > C3S > C2S. C3S reacts more than five times faster than C2S.
Heat of hydration:
The heat of hydration for the four constituents of cement is C3A > C3S > C4AF > C2S. The heat of hydration for each compound is:
C3A: 867 J/kg
C3S: 502 J/kg
C4AF: 419 J/kg
C2S: 260 J/kg
The main cement constituent, C3S, contributes the most to the early strength of Portland cement, while C2S contributes the most to its long-term strength.
Rate of hydration:
The rate of hydration for the four constituents of cement is C3A > C4AF > C3S > C2S. C3S reacts more than five times faster than C2S.
Heat of hydration:
The heat of hydration for the four constituents of cement is C3A > C3S > C4AF > C2S. The heat of hydration for each compound is:
C3A: 867 J/kg
C3S: 502 J/kg
C4AF: 419 J/kg
C2S: 260 J/kg
The main cement constituent, C3S, contributes the most to the early strength of Portland cement, while C2S contributes the most to its long-term strength.
(3)
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