透水模板成型混凝土抗硫酸盐侵蚀性能研究  

Study on Anti-sulfate Erosion Properties of Concrete Poured with CPFL

作　　者：刘培科[1] 田正宏[1,2] 楼添良[3] 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [3]杭州市城市基础设施开发总公司,浙江杭州310006

出　　处：《水电能源科学》2013年第10期117-120,共4页Water Resources and Power

基　　金：江苏省自然科学基金资助项目(BK2010517);水利部公益性行业科研专项经费资助项目(201101013)

摘　　要：采用干湿循环试验方法,对比研究了不同模板成型方式、不同配合比混凝土试件的抗硫酸盐侵蚀性能,以质量损失、相对动弹性模量损失和强度损失来综合表征混凝土的劣化程度;从宏观和微观两方面分析了使用透水模板布对混凝土抗硫酸盐侵蚀性能的影响。结果表明,对于不同配合比混凝土,透水模板可以优化试件表层孔隙分布和成型质量;在硫酸盐溶液干湿循环作用下,试件剥落损失、相对动弹性模量损失和强度损失减小,抗硫酸盐侵蚀性能明显增强。With the method of wet dry cycle test, the anti-sulfate erosion properties of different mix concrete pasted with different moulds are investigated. The loss of mass, relative dynamic modulus of elasticity and strength are used to evaluate the deterioration of concrete specimen comprehensively. The impacts of controlled permeability formwork liner （CPFL） on the anti-sulfate erosion properties of concrete are analyzed from the macro and micro aspects. The results in dicate that under different concrete mix proportion, the pore distribution and performance of concrete can be improved with CPFI.; under sulfate erosion in wet-dry cycle, the loss of weight, relative dynamic modulus of elasticity and strength decrease significantly while the anti-sulfate erosion properties of concrete are enhanced obviously.

关 键 词：透水模板 硫酸盐侵蚀 干湿循环 混凝土劣化 

分 类 号：TV431[水利工程—水工结构工程] TU528[建筑科学—建筑技术科学]