$($a$)$ Explain with example what is destructive and non$-$destructive testing of

concrete? Under what circumstances non$-$destructive testing of concreteProperty of fresh concrete is workability and that of hardened conc

compressive strength and durability. Critically analyse how thes

properties are interlinked.

have to be adopted?

$(3+4)$

$($b$)$ Property of fresh concrete is workability and that of hardened concrete are

compressive strength and durability. Critically analyse how these three

properties are interlinked.