Portland Cement In Building Materials - Portland Cement In Building Materials objective questions and answers
31. The silica in Portland cement should be
A. 10 to 20%
B. 20 to 25%
C. 35 to 40%
D. 40 to 60%
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B. 20 to 25%
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32. The percentage of the slag component of Portland slag cement varies from
A. 10 to 40%
B. 40 to 70%
C. 70 to 80%
D. 80 to 90%
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33. The additional of Pozzolona to Portland cement causes
A. Less heat of hydration
B. Increase in shrinkage
C. Decrease in permeability
D. All of the above
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34. The expansion in Portland cement can be tested by
A. Fineness test
B. Soundness test
C. Setting time test
D. Normal consistency test
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35. The specific gravity of Portland cement is
A. 1.15
B. 2.15
C. 3.15
D. 4.15
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