Civil Engineering - Building Materials - Discussion

Raising of C2S, early strength reduces in comparison to C3S but, increases ultimate strength along with decreasing heat of hydration.

Almost after 1 year, C2S contribute the strength and durability almost equal to the C3S.

C2S imparts resistance to chemical attack.

Initial strength to cement is provided by C3S and later strength is provided by C2S.

So, ultimate strength to cement is provided by both C3S & C2S.

Sabarri: It's not palsticity it's elasticity.

Di-calcium Silicate (C2S): It is responsible for the ultimate strength of concrete. This is also called as Belite.

What Are the Di-calcium silicate? Please explain it.

As water is added to cement, it hydrates and forms tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite.

Tricalcium silicate forms immediately after hydration and responsible for early strength.

Dicalcium silicate contributes strength by around after 7 days and it is responsible for ultimate strength.

Tricalcium aluminate took months to impart strength after hydration and tetracalcium aluminoferrite took even years. Both are less significant in contributing to strength.

Di- Calcium silicate responsible for the lateral strength of cement. C2S.

Tricalcium calcium silicate responsible Early strength of cement. C3S.

I think C2S.

Tricalcium aluminate responsible for initial setting time.
Tricalcium silicate responsible for initial strength.
Di calcium silicate responsible for ultimate strength.
Tetra calcium alumino ferrite responsible for the flash set.

Add 25% of Di-calcium silicate in cement then it provide ultimate strength.