Civil Engineering - Building Materials - Discussion

In low heat cement c2s containt is high. It means least Heat of hydration and least rate of Hydration.

In Cement heat of hydration and early strength gaining properties due to C3A & C3S.

In law heat cement C3A & C3S content is less, thus heat of hydration is less . And low heat cement thus has less initial compressive strength compared to normal.

But, Ultimate strength of low heat cement is more than normal cement.

Low heat concrete is for use to dam construction purposes.

Low heat setting time is 60 mins. Final setting time is 600 mins (IS:12600), used for mass concrete like dams. I have a doubt about its compressive strength.

Low heat cement generates low heat of hydration but the total heat generated is the same as the normal cement. We use low heat cement in mass concreting to avoid temperature stress in the internal zone and cracking. It does not affect the strength of concrete. Because strength depends on mix design we use and cement is one of the ingredients of concrete. Cement is not only the one who gives the strength in concrete. Initial and Final setting time is normal.

Hence D answer is correct.

Low heat cement process high strength for example in dicalcium silicate it is low heat cement but process high strength so we use for Mass concrete works.

D answer is correct.

Low heat cement has less early strength.

But ultimate strength is same as other cement. It is used for mass concrete work.

I think D is the correct answer.

I think strength is not low.