矿渣混凝土力学性能及抗硫酸盐侵蚀性能研究  

Study on mechanical properties and sulfate corrosion resistance of slag concrete

作　　者：程素丽 CHENG Suli(Shanxi Engineering Vocational College,Taiyuan 030013,China)

机构地区：[1]山西工程职业学院,山西太原030013

出　　处：《新型建筑材料》2021年第9期60-62,104,共4页New Building Materials

摘　　要：采用矿渣替代部分水泥制备了矿渣混凝土,研究了矿渣掺量分别为0、20%、40%、60%、80%时混凝土在淡水及硫酸盐环境中抗压强度随养护龄期的变化规律,通过测试各试样在不同侵蚀深度下的SO_(4)^(2-)含量表征矿渣混凝土的抗硫酸盐侵蚀性能,并通过压汞孔径测试分析了矿渣混凝土孔径结构的变化。结果表明,矿渣掺量为40%的混凝土在淡水及硫酸盐环境中养护7、30、60、90、180 d的抗压强度较基准混凝土分别提高了9.7%、17.1%、13.3%、6.0%、5.3%及11.7%、23.0%、22.5%、16.1%、22.2%。掺入适量矿渣可改善混凝土的孔隙结构,使基体更加致密,进而提高混凝土的抗硫酸盐侵蚀性能。Slag concrete was prepared with 0,20%,40%,60%,80% cement replaced by slag.The compressive strength of various dosages slag concrete cured in the fresh water and sulfate solutions was tested with different curing age.And the SO_(4)^(2-)contents of each sample with various erosion depth and curing ages were measured and sulfate attack resistance of each sample were represented.The pore structure of slag concrete was tested by mercury intrusion porosimeter(MIP).And experiments results show that the compressive strength of 40%s lag concrete was improved by 9.7%,17.1%,13.3%,6.0%,5.3% and 11.7%,23.0%,22.5%,16.1%,22.2% when cured in fresh water and sulfate solutions.The pore distribution was optimized and compact microstructure attained proper amount of slag added and better sulfate attack resistance property achieved.

关 键 词：矿渣 混凝土 抗压强度 耐蚀系数 硫酸盐 

分 类 号：TU528.041[建筑科学—建筑技术科学]