DETERMINATION OF FRACTURE ENERGY OF CEMENT PASTE AND MORTAR USING THREE-POINT BENDING TEST
Fracture energy is an important parameter for non-linear fracture mechanics research. However, there exist size effects when three-point bending test is used to determine fracture energy of concrete, rock and other materials. Therefore, three-point bending beams of cement paste and mortar with different sizes and ligament lengths were tested. A complete loaddeflection (P- δ) curve was directly obtained. The variation regularity of fracture energy with size and ligament length of cement paste and mortar were also given in the paper. It was found that fracture energy of cement paste and mortar was very great affected by the tail of the P-δcurve, and a fit was made for the tail of the P-δcurve using power and exponential function,respectively, and then the fitting results of the two functions were compared. After considering the influence of tail curve, fracture energy of cement paste and mortar are sizeindependent.
Yu Zhu Shilang Xu
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian China.
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）