混凝土在不同溶液中抗冻性能的研究  

Research on the frost-resistant capability of concrete in different solutions

作　　者：谢友均[1] 马昆林[1] 许辉[1] 石明霞[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2006年第4期29-34,共6页Journal of Railway Science and Engineering

基　　金：国家"863"高新技术研究发展计划项目(2002AA335020)

摘　　要：采用快冻法研究了纯水泥混凝土、FA混凝土和FA与SF双掺的混凝土在不同溶液中的抗冻性能。结果表明:不同混凝土在不同溶液中抗冻性能不同。在水溶液中,纯水泥混凝土的抗冻性要好于FA混凝土和FA与SF双掺的混凝土;在NaCl溶液中,FA混凝土和FA与SF双掺的混凝土抗冻性强于纯水泥混凝土;在Na2SO4溶液中,FA与SF双掺的混凝土抗冻性最强,FA混凝土次之,纯水泥混凝土较弱;在盐卤水中,混凝土一般不会发生冻融破坏,混凝土抗冻性取决于混凝土抗盐溶液化学侵蚀的性能。The frost resistance of concrete and concrete with FA and concrete with FA and SF exposed in different solutions was studied by the accelerated freezing- thawing test. The results indicate that different concretes have different frost - resistant capability in different solutions. In water solution the frost resistance of concrete, is better than that of concrete with FA and concrete with FA and SF, but in NaCl solution the frost resistance of concrete with FA and concrete with FA and SF is better than that of concrete. In Na2SO4 solution, the frost resistance of concrete with FA and SF is the best while that of concrete is the worst, and the frost resistance of concrete with FA takes the second place. In bittern solution, freezing thawing will not destroy all concretes, and the frost resistance of concrete is decided by the capability of concrete resisting to chemical corrosion.

关 键 词：混凝土 矿物掺合料 抗冻性 溶液 

分 类 号：TU528[建筑科学—建筑技术科学]