Question

To increase the strength and durability of cement, which is added to the mixture.

(A) Hydrated magnesium sulphate

(B) Copper powder

(C) Both (a) and (b)

(D) None of these​

Answer 1

Explanation:

Portland cement-based concrete is the most widely used construction material. Generally, cement is partially replaced by mineral admixtures (fly ash, slag, rice husk ash, silica fume, etc.) to improve the long-term durability of concrete materials by producing dense and compact microstructures

Answer 2

Answer:

D,sand and steel are used