粉煤灰混凝土抗硫酸钠溶液冻融-干湿循环性能  

Property of Fly-ash Concrete in Sodium Sulfate Solution Under Freeze-thaw and Dry-wet Cycling

作　　者：葛勇[1] 袁杰[1] 杨文萃[1] 张国平[1] 张宝生[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《武汉理工大学学报》2008年第6期33-36,共4页Journal of Wuhan University of Technology

基　　金：交通部西部交通建设科技资助项目(200331882008)

摘　　要：采用冻融与干湿循环交替的方法,研究了不同强度等级、不同含气量的混凝土在水和硫酸钠溶液(浓度为5%、7%和10%)中的耐久性。试验表明:混凝土在硫酸钠溶液中冻融-干湿循环劣化程度和速度远大于水中,且硫酸钠溶液的浓度越高,影响越大;不同于冻融循环作用,混凝土在硫酸钠溶液中冻融-干湿循环时的质量损失大;掺加引气剂及提高混凝土强度均能改善混凝土的抗冻融-干湿循环性能。The durability of concrete with different air content and strength in water and sodium sulfate solutions（concentration of 5%,7% and 10%） was researched in this paper by method of alternate freeze-thaw cycles and dry-wet cycles.The results showed that deterioration of concrete in sodium sulfate solution was more serious and quicker than in water,which was obvious in higher concentration solution.The weight loss of concrete samples subjected double effects was greater than that of single frost effect in sodium sulfate solution.Entraining air and using high strength concrete can increase the durability of concrete in sulfate environment.

关 键 词：混凝土 耐久性 冻融-干湿循环 硫酸钠 

分 类 号：TU528[建筑科学—建筑技术科学]