Addition of air entraining agents to concrete increases all of the following EXCEPT

The types of aggregates not suitable for high strength concrete and for pavements subjected to tension, is

The apparent specific gravity of an aggregate is defined as

Setting time of cement increases by adding

The length of Vicat plunger in Vicat's apparatus varies from

Minimum number of days required for curing fresh laid concrete under normal atmospheric condition is

A suitable admixture added at the time of preparing for concrete mix makes the concrete:

Strain in concrete at zero stress is called