为了科学的评价膨胀剂的膨胀效能,采用温度—应力试验机法,研究了补偿收缩混凝土的开裂敏感性。试验结果表明:补偿收缩混凝土的最大压应力,最大膨胀变形值(无约束)、开裂应力和开裂时间远大于基准混凝土,且综合评价指标—开裂温度降低10℃以上,混凝土开裂敏感性大大降低;掺加膨胀剂来改善高性能混凝土的开裂敏感性的效果要优于传统的技术途径。 In order to evaluate the expansion performance of expansive agent scientifically, the cracking sensitivity of compensated shrinkage concrete was studied by using temperature-stress testing machine. The experimental results show that the maximum compressive stress, the maximum deformation value (without constraint), the cracking stress and the cracking time of the compensated concrete are far greater than those of the benchmark concrete, and the comprehensive evaluation index - cracking temperature is lower than 10 ℃, the cracking susceptibility of concrete is greatly reduced; Addition of expansive agent to improve the cracking resistance of high performance concrete is better than the traditional technical approach.