1.

Air entrainment Portland cementi) offers great resistance to sulphate attackii) offers great resistance to freezing and thawingiii) reduces the possibility of shrinkage and crack formation in the concrete surfaceiv) is suitable for mass concreting

A. Only i)
B. i) and ii)
C. i), ii) and iii)
D. i), ii), iii) and iv)
Answer» D. i), ii), iii) and iv)


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