Which Bogue compound, on reaction with water, is mainly responsible for the EARLY strength of concrete?
A{'text': 'C3A (tricalcium aluminate)', 'label': 'A'}
B{'text': 'C2S (dicalcium silicate)', 'label': 'B'}
C{'text': 'C3S (tricalcium silicate)', 'label': 'C'}
D{'text': 'C4AF (tetracalcium aluminoferrite)', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'C3S (tricalcium silicate)', 'label': 'C'}
1. §1.5(b): 'C3S readily reacts with water, producing more heat of hydration and is responsible for early strength of Concrete.'
2. §1.5(c) contrasts: 'C2S hydrates more slowly, produces less heat of hydration and is responsible for later strength of Concrete.'
3. C3A and C4AF hydration products do not contribute to strength.
_Source: IGNOU ET-522 Block-1 Unit-1 Cement, §1.5(b)-(c), p. 8_
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