无机聚合物混凝土抗硫酸盐侵蚀性能研究  

Research on Sulfate Attack Resistance of Geopolymer Concrete

作　　者：谢亮[1,2] 曾建锋 李兆恒 陈晓文[1,2] 张君禄 XIE Liang;LI Zhaoheng;CHEN Xiaowen;ZHANG Junlu(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;Guangdong Provincial Research Center on Water Conservancy New Materials and Structural Engineering,Guangzhou 510635,China)

机构地区：[1]广东省水利水电科学研究院,广东广州510635 [2]广东省水利新材料与结构工程技术研究中心,广东广州510635

出　　处：《广东水利水电》2019年第10期10-13,56,共5页Guangdong Water Resources and Hydropower

基　　金：广东省水利科技创新项目(编号:2015-10)

摘　　要：通过干湿循环方式研究了无机聚合物混凝土的抗硫酸盐侵蚀性能,结果表明:硫酸盐侵蚀后,无机聚合物混凝土的硫酸盐腐蚀破坏机理与普通混凝土不同,其主要是浆体剥落,骨料外露,不出现明显裂缝,试样仍保持较好的完整性,而普通混凝土在侵蚀75 d胀裂破坏;两种混凝土在侵蚀溶液中的吸水率、质量和抗压强度变化趋势相似,但普通混凝土的劣化幅度较大;Na 2SO 4侵蚀后,无机聚合物的结构更加致密,无新产物生成。The sulfate attack resistance of geopolymer concrete was studied by dry-wet cycling.The results showed that after sulfate attack,the sulfate damage mechanism of geopolymer concrete was different from ordinary concrete.It was mainly that the slurry dissolved out without obvious cracks,and the sample still maintained good integrity,while ordinary concrete suffered from expansion crack damage after 75 days.The change trend of water absorption,quality and compressive strength of the two kinds concrete in erosion solution were similar,but the deterioration range of ordinary concrete was larger.After Na2SO4 attack,the structure of geopolymer become denser and no new products appeared.

关 键 词：无机聚合物 硫酸盐侵蚀 表观形貌 抗压强度 

分 类 号：TV431.6[水利工程—水工结构工程]