羧基丁苯胶乳在水泥砂浆中引泡规律及消泡特性研究  

Research on Foaming Rules and De-foaming Characteristics of Carboxylated Styrene Butadiene Latex in Cement Mortar

作　　者：郑少鹏 陈亮亮[1] 熊文玥 牛开民 田波 程志豪[1] ZHENG Shao-peng;CHEN Liang-liang;XIONG Wen-yue;NIU Kai-min;TIAN Bo;CHENG Zhi-hao(Broadvision Engineering Consultants,National Engineering Laboratory for Surface Transportation Weather Impacts Prevention, Kunming 650041,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;ResearchInstitute of Highway Ministry of Transport,Beijing 100088,China;School of ArchitecturalEngineering,Yunnan Agricultural University,Kunming 650201,China.)

机构地区：[1]云南省交通规划设计研究院陆地交通气象灾害防治技术国家工程实验室,昆明市650041 [2]重庆交通大学土木工程学院,重庆市400074 [3]交通运输部公路科学研究院,北京市100088 [4]云南农业大学建筑工程学院,昆明市650201

出　　处：《公路》2018年第12期243-247,共5页Highway

基　　金：云南省应用基础研究面上项目,项目编号2016FB099;云南省交通规划设计研究院科技项目,项目编号ZL-2015-04;国家自然科学基金资助项目,项目编号51508137;中国博士后科学基金面上资助项目,项目编号2014M560266

摘　　要：研究了羧基丁苯胶乳在水泥砂浆内部引入气泡特征,分析了消泡剂对气泡的影响规律。结果表明:随着羧基丁苯胶乳掺量的增加,其含气量不断增加,掺量为25%时可达普通水泥砂浆的4.86倍;硬化后气孔含量增加,且以≥1000μm的气孔含量居多;不同种类消泡剂均降低了含气量,D类消泡效果最好,掺量为0.6%时含气量比未加消泡剂试验结果降低了53.3%,但高出标准试验结果60.0%;增加D类消泡剂的掺量,未能彻底消除气泡,过量消泡剂减小了5~200μm尺寸内的气孔含量,但大尺寸气泡有增加的趋势。The air bubble characteristics of carboxylated styrene butadiene latex in cement mortar are studied,and the influence of de-foaming agent on bubble is analyzed.The results indicate that:(1)with the increase of the content of carboxylated styrene butadiene latex,the gas content increases continuously, and when the dosage is 25%,it can reach 4.86 times of ordinary cement mortar;the porosity of hardened cement mortar increases,and the stomatal content of more than 1000μm is the majority.(2) Different defoaming agents can reduce the gas content,type D de-foaming effect is best,when the content is 0.6%, the gas content is 53.3% lower than that without de-foaming agent,but the result is 60%higher than the standard test result.And (3) increase the amount of D defoamer cannot completely remove the air bubble, the excess defoaming agent reduces the pore content in the size of 5μm^200μm,but larger bubbles have a tendency to increase.

关 键 词：道路工程 水泥砂浆 羧基丁苯胶乳 引泡规律 消泡特性 

分 类 号：U414.01[交通运输工程—道路与铁道工程]