The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds

Soundness test of cement by Le-Chatelier's apparatus gives unsoundness due to

The C4AF in cement has the cementing value

For finding compressive strength of concrete, the minimum number of cubes required is

For constant w/c ratio if the aggregate/cement ratio is reduced, the workability of concrete

Light-weight concrete is prepared by

Workability of concrete is measured by

The concrete mix which causes difficulty in obtaining a smooth finish, possess