Civil Engineering MCQAE Level Civil Engineering
Excessive unsoundness in cement is mainly caused by:
Building MaterialsConstruction Materials, Practices, Planning and ManagementHARD
Choose the correct answer
A
low C3S only
B
low fineness
C
free lime and magnesia
D
gypsum deficiency only
Correct Answer
C. free lime and magnesia
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Free CaO and MgO hydrate slowly after setting and cause delayed expansion, leading to unsoundness.
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