碳纳米管与丁苯胶乳提升聚合物水泥砂浆力学和阻尼性能的研究  

Mechanical and damping properties of polymer cement mortar improved by carbon nanotubes and styrene-butadiene latex

作　　者：刘彬[1] 刘修良 王激扬[2,3] 张博 LIU Bin;LIU Xiuliang;WANG Jiyang;ZHANG Bo(Zhejiang College of Construction,Hangzhou 311231,China;Center for Balance Architecture,Zhejiang University,Hangzhou 310058,China;Institute of Advanced Engineering Structures,Zhejiang University,Hangzhou 310058,China;Ocean Research Center of Zhoushan,Zhejiang University,Zhoushan 316021,China)

机构地区：[1]浙江建设职业技术学院,浙江杭州311231 [2]浙江大学平衡建筑研究中心,浙江杭州310058 [3]浙江大学高性能结构研究所,浙江杭州310058 [4]浙江大学舟山海洋研究中心,浙江舟山316021

出　　处：《混凝土》2023年第8期148-153,共6页Concrete

基　　金：浙江省基础公益研究计划(LGG22E080004);国家自然科学基金面上项目(51578495);住房和城乡建设部科技项目(2019-K-041);舟山市科技计划项目(2022C01012,2022C13025)。

摘　　要：将碳纳米管(CNTs)均匀分散到羧基丁苯胶乳(XSBRL)中形成混合液,并制备聚合物改性水泥砂浆(CLMM)。通过静、动态力学性能试验及微观试验,探讨了碳纳米管与丁苯胶乳对CLMM的力学和阻尼性能提升的影响及机理。结果表明:与普通水泥砂浆相比,碳纳米管与丁苯胶乳复掺提升了CLMM的基本力学性能;损耗因子随频率和温度的变化而变化,且在20℃、1.5 Hz条件下,聚灰比和碳灰比分别为15%和0.05%时,损耗因子提升至普通水泥砂浆的14倍;均匀分散的碳纳米管-丁苯胶乳形成了三维网络结构,填充并优化了水泥砂浆基体的孔隙结构,可同时提升CLMM的力学和阻尼性能。Carbon nanotubes(CNTs)were uniformly dispersed into carboxyl-styrene butadiene latex(XSBRL)to form a mixture,and CNTs-XSBRL modified cement mortar(CLMM)was prepared.The effects of carbon nanotubes and styrene-butadiene latex on the mechanical and damping properties of CLMM were investigated through static,dynamic,and microscopic tests.The results show that,compared with ordinary cement mortar,carbon nanotubes,and styrene butadiene latex can improve the basic mechanical properties of CLMM.The loss factor changes with frequency and temperature.At 20℃and 1.5 Hz,when the polymer-cement and carbon-cement ratios are 15%and 0.05%respectively,the loss factor increases to 14 times that of ordinary cement mortar.The evenly dispersed carbon nanotube-styrene butadiene latex formed a three-dimensional network structure,filled and optimized the pore structure of the cement mortar matrix,and improved the mechanical and damping properties of CLMM.

关 键 词：碳纳米管 丁苯乳胶 阻尼 损耗因子 孔隙结构 

分 类 号：TU528.01[建筑科学—建筑技术科学]