Arrange the bogue compounds in ordinary portland cement (OPC) in increasing order ( least to maximum)
of their heat of hydration.
1. Tricalcium aluminate (C3A)
2. Tricalcium silicate (C3S)
3. Dicalcium silicate (C2S)
4. Tetra calcium alumino ferrite (C4AF)
Approximate heat of hydration values are:
• C2S ≈ 260 J/g — Lowest
• C4AF ≈ 420 J/g
• C3S ≈ 500 J/g
• C3A ≈ 865 J/g — Highest
Therefore, increasing order of heat of hydration is:
C2S < C4AF < C3S < C3APreparing students for success in a changing World.
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