改性硫铝酸盐水泥砂浆力学性能及耐久性能研究  

Study on mechanical properties and durability of modified sulfoaluminate cement mortar

作　　者：刘平[1] 贾冠元 陈庞 曹忠露[2,3] 戎贤 LIU Ping;JIA Guanyuan;CHEN Pang;CAO Zhonglu;RONG Xian(Hebei University of Technology,Tianjin 300401,China;CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China;CCCC First Harbor Engineering Company Ltd.,Tianjin 300461,China)

机构地区：[1]河北工业大学,天津300401 [2]中交天津港湾工程研究院有限公司,天津300222 [3]中交第一航务工程局有限公司,天津300461

出　　处：《混凝土》2024年第6期180-183,188,共5页Concrete

基　　金：国家自然科学基金(52108132);中交一航局科技研发项目(2021-7-17);中国建筑一局(集团)有限公司科技发展课题(KJYF-2021-26);河北省重点研发计划项目(19275404D)。

摘　　要：过快的流动度损失和后期不稳定的强度发展限制了硫铝酸盐水泥工程中的进一步应用。因此以葡萄糖酸钠作为缓凝剂,掺入硅灰制备成改性硫铝酸盐水泥砂浆,并对其工作性能、力学性能和抗氯离子渗透性能开展了系统研究。研究结果表明:葡萄糖酸钠掺量0.4%可有效延长硫铝酸盐水泥砂浆凝结时间,提高砂浆流动性和抗氯离子渗透性能;硫铝酸盐砂浆工作性能、力学性能和抗氯离子渗透性能均随硅灰掺量的增加先提高后降低,硅灰最优掺量为20%。The rapid setting rate and unstable strength development of sulphoaluminate cement in the late stage limit its further application in engineering.Accordingly,in this study,sodium gluconate(SG)was used as a retarder.The modified sulphoaluminate cement mortar was prepared by adding silica fume.Further,the mortar's working performance,mechanical properties,and chloride ion penetration resistance were systematically investigated.The study results show that an SG dosage of 0.4% can effectively prolong the setting time and improve the fluidity of sulphoaluminate cement mortar.Moreover,the mortar′s resistance to chloride penetration is increased.The working properties,mechanical properties,and chloride ion penetration resistance of sulphoaluminate mortar first increase and then decrease with the increase in silica fume content(the optimal content is 20%).

关 键 词：硫铝酸盐水泥 葡萄糖酸钠 硅灰 工作性能 力学性能 抗氯离子渗透性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]