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6 Pages

Heat deterioration on fracture properties of concrete

Y. Kitsutaka & K. Matsuzawa

ABSTRACT: Concrete structures for nuclear power plant may be subjected to the heating conditions of not more than 65°C for a long period. This paper reports on the investigation into the fracture properties of concrete subjected to the effects of heating of 60°C. Threepoint bending tests were conducted to measure the load versus crack mouth opening displacement (L-CMOD) curves. The initial cohesive stress and fracture energy were estimated by the inverse analysis of tension softening diagram calculated by the L-CMOD curve. The effect of heating on the fracture properties was discussed.