1: Name the component that responsible for early strength of concrete:
Ans: C3S ( Tri Calcium silicate ) , that react with water and produces more heat of hydration is responsible for early strength of concrete.
2: Which compound contribute to the later strength of concrete ?
Ans: C2S ( Di Calcium silicate ) that hydrates slowly , contribute to the later strength of concrete .
3: After how many days , the compressive strength developed by C3S and C2S are equal .
Ans: ONE year
4:For road rapid work which type of cement is recommended :
Ans: Rapid hardening cement
5: In how many days , about 50% of the total heat evolution occurs.
Ans: During the first 3 days of hydration
6:Which oxides are responsible for high early strength of cement ?
Ans: High total alumina and high ferric oxide content favour the production of high early strength in cement