Civil Engineering MCQAE Level Civil Engineering
The expansion (unsoundness) of Portland Cement is caused by
Building MaterialsBuilding MaterialsMEDIUM
Choose the correct answer
A
voids
B
iron oxide
C
free silica
D
free lime
Correct Answer
D. free lime
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Free lime (and free magnesia) cause delayed expansion/unsoundness.
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This MCQ belongs to WBPSC AE Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.