高扬程灌区水工混凝土建筑物盐冻破坏机理的研究

摘要

混凝土建筑物的冻融循环破坏是影响灌溉工程安全运行的重要原因之一.通过对景电灌区频繁发生冻融破坏的水工建筑物迫害原因试验分析,认为灌区建筑物长期处于盐冻共同作用下,是造成建筑物破坏的主要原因之一,结果表明,当混凝土先进行侵蚀试验,随后再冻融时,侵蚀对冻融循环有促进作用.合理的配合比设计和加入CM型复合添加料可以明显提高混凝土抵抗盐冻破坏的能力.%The freeze-thaw cycle damage of concrete structures is one of the important causes that affect the safety of irrigation projects. Based on the test analysis about the damage to hydraulic structures in Jingdian Irrigation Area,it is considered that the joint action of salt and freezing in a long period is one of the major causes for the building damage. The experimental analysis shows that the erosion of concrete is made by freeze-thaw cycle. Reasonable design and CM composite materials can significantly improve the resistance to salt and freezing damage.