VAE乳胶粉与偏高岭土聚合物改性防水砂浆性能研究  

Performance of Waterproofing Mortar Modified by VAE Latex Powder and Metakaolin Polymer

作　　者：闫东 刘浩博 张凤翔 肖学党 张雷[4] 陈松柏 来利鹏 李士民 成帅 李肖飞 赵军[6] YAN Dong;LIU Haobo;ZHANG Fengxiang;XIAO Xuedang;ZHANG Lei;CHEN Songbai;LAI Lipeng;LI Shimin;CHENG Shuai;LI Xiaofei;ZHAO Jun(College of Architecture and Civil Engineering,Xinyang Normal University,Xinyang 464000,China;Henan New Environmentally-Friendly Civil Engineering Materials Engineering Research Center,Xinyang Normal University,Xinyang 464000,China;Xinyang Lingshi Technology Company Limited,Xinyang 464000,China;Yellow River Conservancy Research Institute,Yellow River Conservancy Commission,Zhengzhou 450003,China;Zhejiang Jinhua City Pujiang County Construction Engineering Quality and Safety Supervision Station,Jinhua 322200,China;School of Architecture and Construction,Zhengzhou University,Zhengzhou 450003,China)

机构地区：[1]信阳师范大学建筑与土木工程学院,河南信阳464000 [2]信阳师范大学河南省新型环保土木工程材料工程研究中心,河南信阳464000 [3]信阳市灵石科技有限公司,河南信阳464000 [4]黄河水利委员会黄河水利科学研究院,河南郑州450003 [5]浙江省金华市浦江县建设工程质量安全监督站,浙江金华322200 [6]郑州大学土木工程学院,河南郑州450003

出　　处：《信阳师范学院学报（自然科学版）》2024年第4期491-497,507,共8页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(52279134);河南省自然科学基金项目(232300420323)。

摘　　要：为了提高普通砂浆抗渗性能,提出了一种将有机聚合物与无机矿物相结合、并内掺有机硅赋予普通砂浆优良抗渗性能的试验研究。通过对防水砂浆抗压强度、抗折强度、抗渗强度、吸水率的测定分析,得到了高性能的聚合物改性防水砂浆。研究结果表明:(1)可再分散乳胶粉在水泥砂浆中形成的膜结构,会显著降低抗压强度而提高抗渗强度,适宜掺量应为水泥质量的3%;(2)偏高岭土具有的火山灰活性,可与水化产物发生二次反应,但应注意掺量与力学性能的关系,不宜大于6%;(3)聚硅氧烷在砂浆中形成的有机硅憎水基团,可以赋予防水砂浆优良憎水性,从而提高抗渗强度降低吸水率,掺量为0.5%时综合性能最优;(4)聚合物改性防水砂浆在具有良好力学性能的同时,抗渗强度从最初的1.0 MPa升至2.3 MPa,吸水率从7.7%降至5.2%,各项性能均远超国家规范对聚合物防水砂浆的要求。该研究成果可为防水砂浆的推广使用及改性研究提供参考。In order to improve the impermeability of ordinary mortar,an experimental study was proposed to combine organic polymers with inorganic minerals and incorporate organic silicon to endow ordinary mortar with excellent impermeability performance.Through the determination and analysis of the compressive strength,folding strength,impermeability strength and water absorption rate of waterproof mortar,the high performance polymer modified waterproof mortar was obtained.The results showed that:(1)The film structure,formed by redispersing latex powder in cement mortar,would significantly reduce the compressive strength and increase the impermeability strength.The appropriate mixing amount should be 3%of the cement quality;(2)The volcanic ash activity of the parakaolin could undergo a secondary reaction with the hydration product.However,attention should be paid to the relationship between admixture and mechanical properties,the amount of dosage should not be greater than 6%;(3)The silicone hydropathy group,formed by polysiloxane in mortar,could give waterproof mortar good hydrophobic,further improve the impermeability strength and reduce the water absorption rate,the comprehensive performance was optimal at 0.5%mixture;(4)The polymer-modified waterproof mortar had good mechanical properties,the impermeability intensity was increased from the initial 1.0 MPa to 2.3 MPa,the water absorption was decreased from 7.7%to 5.2%,all the properties were far beyond the requirements of the national specifications for polymer waterproof mortar.The research results could provide reference for the popularization,use and modification of waterproof mortar.

关 键 词：防水砂浆 聚合物改性 可再分散乳胶粉 偏高岭土 有机硅 

分 类 号：TU528.041[建筑科学—建筑技术科学]