SAP对高性能水泥基材料水化及性能的影响  

Effect of SAP’s Particle Size on Properties and Hydration of High Performance Cement-based Materials

作　　者：马先伟 项建平 王继娜 李志新 刘剑辉[3] 史才军 MA Xianwei;XIANG Jianping;WANG Jina;LI Zhixin;LIU Jianhui;SHI Caijun(College of Civil and Transport Engineering,Henan University of Urban Construction,Pindingshan 467036,China;Huzhou Buliding Ceramic Materials Technology Co.LTD,Huzhou 313216,China;College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]河南城建学院土木与交通工程学院,河南平顶山467036 [2]湖州陶筑建材科技有限公司,浙江湖州313216 [3]湖南大学土木工程学院,湖南长沙410082

出　　处：《材料科学与工程学报》2019年第6期946-952,共7页Journal of Materials Science and Engineering

基　　金：国家自然基金项目资助项目(U1504508)

摘　　要：高吸水树脂(SAP)粒径变化会改变到其吸-释水过程,可能含影响到胶凝材料水化和混凝土的性能。本研究采用两种粒径差异较大的SAP,研究高性能水泥基材料自收缩和干燥条件(60%RH)强度的变化,并通过水化和孔结构分析,探讨了强度变化的原因。研究结果表明,SAP粒径增大降低了高性能水泥基材料自收缩,且在总水胶比相同时提高了强度。这些影响与硬化浆体水化程度提高和大孔数量减小有关。The particle size of superabsorbent polymer(SAP)changes its absorption and desorption process,which also affect on the hydration and properties of high performance cement-based materials the above mentioned properties.In this paper,SAP with two considerably different particle sizes were used,and the strength in a relative drying condition(60%RH)and autogenous shrinkage of the high performance cement-based materials were studied.The relationship of strength or autogenous shrinkage with pore structure and hydration was also analyzed.The results show that SAP with larger particle size evidently decreases the autogenous shrinkage,and at the same initial water-and-binder ratio increases the strength.These changes are related to the increase in the degree of hydration and the decrease in the content of pore with sizes larger than 100 nm.

关 键 词：SAP 内养护 高性能水泥基材料 水化 混凝土 

分 类 号：TU528[建筑科学—建筑技术科学]