信阳师范学院学报（自然科学版）2024，Vol.37Issue(4)：491-497,507,8.DOI:10.3969/j.issn.1003-0972.2024.04.011
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
摘要
Abstract
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Key words
waterproof mortar/polymer modification/redispersible emulsion powder/metakaolin/organosilicon分类
建筑与水利引用本文复制引用
闫东,李肖飞,赵军,刘浩博,张凤翔,肖学党,张雷,陈松柏,来利鹏,李士民,成帅..VAE乳胶粉与偏高岭土聚合物改性防水砂浆性能研究[J].信阳师范学院学报（自然科学版）,2024,37(4):491-497,507,8.基金项目
国家自然科学基金项目(52279134) （52279134）
河南省自然科学基金项目(232300420323) （232300420323）
