In massive reinforced concrete structures, the setting, and hardening of concrete is accompanied by non-linear temperature distribution caused by developing heat of hydration. This leads to development of tensile stress in concrete that may exceed tensile strength of young concrete and cause early cracking. This paper describes an effective method of predicting the temperature history in concrete due to heat of hydration. The predicted temperature history has been compared with the temperature data recorded in the ring beam of the Inner containment structure of one of the PHWR in India. The method of evaluation of stresses at the early age due to heat of hydration, creep and shrinkage and control of cracking has also been discussed in this paper.
展开▼
