Abstract
With enlarging scale of concrete structures, thermal cracks in massive reinforced concretes have become one of the pressing problems of the day. This paper deals with the development of a moderate prestressing method using an expansive demolition agent for thermal cracking control. In order to examine the degree of prestressing in new unbonded tendon, several experiments are carried out by cylindrical model in a laboratory. This new method is proved useful by several field experiments. In addition, the experimental results are compared with some numerical calculations to clarify the applicability of a newly proposed theoretical method to predict the control effect of thermal crack.
