纳米粒子/聚合物对水泥基材料强度和抗渗性的影响  

Effects of nanoparticle/polymer composites on strength andimpermeability of cement-based materials

作　　者：梅军鹏 徐智东[1] 李海南 马保国[3] 王智鑫[1] 姜天华 MEI Junpeng;XU Zhidong;LI Hainan;MA Baoguo;WANG Zhixin;JIANG Tianhua(School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430081, China;Department of Construction Cost, Wuhan Textile University, Wuhan 430200, China;State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China)

机构地区：[1]武汉科技大学城市建设学院,武汉430081 [2]武汉纺织大学工程造价系,武汉430200 [3]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《功能材料》2021年第12期12184-12189,共6页Journal of Functional Materials

基　　金：国家自然科学基金(51908434);湖北省教育厅科学技术研究计划项目(Q20191706)。

摘　　要：研究了纳米二氧化钛(Nano-TiO_(2),NT)/苯丙乳液(Styrene-acrylic emulsion,SAE)复合对水泥基材料强度和抗渗性的影响,并通过它们对硬化水泥石水化特性及微观结构的影响分析了其作用机理。结果表明,SAE-NT复掺可显著改善单掺SAE引起的早期强度降低及对水化的延迟作用,降低水泥基材料的总孔容、有害孔和多害孔,细化孔结构,提高水泥熟料的水化程度及C-S-H凝胶的聚合度,从而提高水泥基材料的强度和抗渗性。研究成果对纳米粒子/聚合物在水泥基材料中的复合应用具有一定的指导意义。In this paper,the effects of nano-TiO_(2)(NT)/styrene-acrylic emulsion(SAE)composites on strength and impermeability of cement-based materials are studied,and the underlying mechanism is analyzed through their influences on the hydration characteristics and microstructures of hardened cement pastes.Results show that mix SAE and NT could significantly improve the early strength degradation and hydration delay caused by mix SAE alone,reduce the total pore volume,and the amount of harmful and much harm pores,refine the pore structure,and increase the hydration degree of cement clinker and the polymerization degree of C-S-H gels,so as to improve the strength and anti-permeability.Such results have some guiding significance for the composite application of nanoparticle/polymer in cement-based materials.

关 键 词：纳米TiO_(2) 苯丙乳液 强度 抗渗性 水化特性 微观结构 

分 类 号：TQ172[化学工程—水泥工业]