Question

As per IS Specifications, the heat of hydration of low-heat Portland cement for 28 days is-

• A. Not more than 100 calories/gm
• B. Not more than 50 calories/gm
• C. Not more than 75 calories/gm
• D. Not more than 150 calories/gm

Answer 1

The correct option is C Not more than 75 calories/gm

As per IS code specifications, the heat of hydration of low heat Portland cement for 28 days is not more than 75 calories/gm.
As per IS 4031 : 1988, the heat of hydration of low-heat Portland cement for 7 days should not be more than 65 calories per gram. The heat of hydration should not be more than 272 and 314 J/gm at the end of 7 and 28 days.