纳米CaCO3对混凝土抗冲磨性能影响试验研究  

Experimental Research on Abrasion Resistance of Concrete Mixed with Nano-CaCO3

作　　者：田竞 苏骏 吴鹏 何真[2] 蔡新华[2] TIAN Jing;SU Jun;WU Peng;HE Zhen;CAI Xin-hua(School of Civil and Environmental Engineering,Hubei University of Technology,Wuhan 430068,China;State KeyLaboratory of Water Resources and Hydropower Engineering Science,Wuhan University,430072,China)

机构地区：[1]湖北工业大学土木建筑与环境学院,武汉430068 [2]武汉大学水利水电学院,430072

出　　处：《混凝土与水泥制品》2020年第6期9-12,共4页China Concrete and Cement Products

基　　金：国家自然科学基金(51579195)。

摘　　要：试验研究了不同掺量纳米CaCO3对混凝土力学性能和抗冲磨性能的影响,并通过水化热测试方法研究了纳米CaCO3对混凝土性能影响的机理。试验结果表明,适量的纳米CaCO3可以提升混凝土的力学性能,提高混凝土的抗压强度、劈裂抗拉强度和抗冲磨性能。当纳米CaCO3的掺量为1.5%时,混凝土抗冲磨强度提高约6倍;纳米CaCO3促进了水泥的水化反应,改善了水泥浆体微观结构,提升了整体的密实性。The effects of Nano-CaCO3 with different content on the mechanical properties and abrasion resistance of concrete were investigated experimentally.The influence mechanism of Nano-CaCO3 on concrete was studied by hydration heat test.The experimental results show that appropriate amount of Nano-CaCO3(not exceed 1.5%)can improve the mechanical properties of concrete,such as the compressive strength,splitting tensile strength and abrasion resistance of concrete.The compressive strength of concrete with 1.5%Nano-CaCO3 is about 6 times than the one without Nano-CaCO3.The results reveal that Nano-CaCO3 promote hydration reaction,accelerate hydration heat release rate,refine the microstructure of cement paste,and enhance the overall compactness.

关 键 词：纳米碳酸钙 混凝土力学性能 抗冲磨性能 微观结构 

分 类 号：TU528.45[建筑科学—建筑技术科学]