M25 grade concrete has.................. approximate proportion of cement:sand:coarse aggregate

M 30 and above grade concrete requires proportion as per

density of light weight concrete is ranging from .........

Poly propylene and nylon fibers

For High density concrete specific gravity of coarse aggregate should be more than........

Concrete is weak in tension so steel bars are placed in concrete to make concrete strong enough to bear tensile stresses.

Concrete of various grades can be obtained as per requirement by using

Water cement ratio is

When other parameters are kept constant and concrete is compacted satisfactorily the compressive strength of concrete is ................. proportional to the water cement ratio