浙江大学 建筑工程学院，浙江 杭州 310058
林学智（1997—），男，福建莆田人，浙江大学硕士生. E-mail：dazhige@zju.edu.cn
赖俊英（1977—），女，福建龙岩人，浙江大学副教授，硕士生导师，博士. E-mail：junyinglai@zju.edu.cn
TU528.01
国家自然科学基金资助项目（51978608）；浙江省基础公益技术研究计划项目（LGG21E080010）
College of Civil Engineering and Architecture， Zhejiang University， Hangzhou 310058， China
将5种聚醚型两亲分子作为减缩组分，测试了其对水泥净浆收缩变形的影响，探究了表面张力与胶束粒径分布对收缩的影响机理.结果表明：二乙二醇丁醚、三丙二醇甲醚和聚乙二醇400不形成稳定的胶束，减缩效果随着孔溶液表面张力的降低而提高；聚醚改性硅油具有低临界胶束浓度（CMC），形成的胶束大小为30 nm左右，影响了聚醚改性硅油单体在毛细孔溶液表面的铺展，同时细化了水泥石的孔结构，减缩效果较差；含氟聚醚具有超低的表面张力及CMC，其胶束易产生聚沉，孔溶液的有效含量极低，无减缩效果.
The effects of five kinds of amphiphilic polyether as shrinkage reducing components on the shrinkage deformation of cement paste were tested， and the mechanism of surface tension and micellar particle size distribution on the shrinkage was explored. The results show that diethylene glycol butyl ether， tripropylene glycol methyl ether and polyethylene glycol 400 do not form stable micelles， and the shrinkage reduction effect increases with the decrease of pore solution surface tension. Polyether modified silicone oil has low critical micelle concentration（CMC） and the size of micelle formed is about 30 nm， which affects the spreading of monomer on the surface of capillary solution and refines the pore structure of cement paste， resulting in poor shrinkage reduction effect. Fluorinated polyether has ultra-low surface tension and CMC， which is easy to produce coalescence， so that the effective content of pore solution is extremely low and there is no reduction effect on shrinkage.
林学智,赖俊英,周益帆,钱晓倩,钱匡亮.聚醚型两亲分子对水泥净浆收缩的影响及机理[J].建筑材料学报,2024,27(1):1-8
复制
