中文摘要：

采用气候模拟系统，对F50抗冻设计等级水工混凝土在-5℃、-10℃、-17℃、-25℃冻融最低中心温度，F300抗冻设计等级水工混凝土在-17℃、-30℃、-40℃冻融最低中心温度下进行了冻融试验。试验得到了低抗冻设计水工混凝土、高抗冻设计水工混凝土在不同冻融中心低温条件下的质量损失、动弹性模量、力学性能以及能经受的最大冻融循环次数的变化规律。并采用环境扫描电子显微镜，对冻融作用后的水工混凝土的微观特性进行了分析。

英文摘要：

The freeze-thaw cycle tests on hydraulic concrete of antifreeze design FS0 under temperature of - 5℃, - 10℃, - 17℃ and -25℃ and that of antifreeze design F300 under temperature of - 17℃, -30℃ and -40℃ were conducted. The variation trends in mass loss, dynamic elastic modulus, mechanical properties and maximum number of freeze-thaw cycles withstood by these concretes under the listed temperatures were proposed. The morphology of the concretes after the freeze-thaw action were examined by using an environmental scanning electron microscope.