Explain the processes that occur when concrete changes tempe

Explain the processes that occur when concrete changes temperature and which res in volume change (i.e. why does concrete change volume when its temperature changes?). What is the generally regarded value for the coefficient of thermal expan 7.23 of concrete?

Solution

SOLUTION:As we know that when temperture varies ,concrete change in volume ,

HYDRATION:(ENTIRE HYDRATION PROCESS NOTHING BUT AN INTERNAL VOLUME CHANGE)

Coefficient of thermal expansion is define as the change in unit length per degree change of temperture.

in concrete it deponds upon the mix proportions .The coefficient of thermal expansion of hydrated cement paste varies between 11*10^-6 and 20*10^-6 per ⁰c.