The maximum quantity of aggregate per 50 kg of cement should not exceed

The minimum water-cement ratio to obtain workable concrete is

Harshness in concrete is due to the excess of

The cement concrete in which high compressive stressed are artificially induced before its actual use is called

The approx. ratio of the direct tensile strength to direct compressible strength test is

For construction of structures in seawater, the cement generally preferred to, is

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

The mixer, which produces a steady stream of concrete as long as it is in operation, is known as