新型聚羧酸引气型外加剂的常温合成及其性能研究  

Synthesis of Novel Polycarboxylic Acid-based Air-entraining Additive for Concrete at Normal Temperature and its Performance Study

作　　者：叶朗 李琼阳 陈秋华 全志龙[1] 何奕聪 卢其生 李世明 YE Lang;LI Qiong-yang;CHEN Qiu-hua;QUAN Zhi-long;HE Yi-cong;LU Qi-sheng;LI Shi-ming(College of Materials Science and Engineering,Huaqiao University,Xiaman 361021,China;Zhongtai（Fujian）Concrete Development Company Limited,Quanzhou,362021,China)

机构地区：[1]华侨大学材料科学与工程学院,厦门361021 [2]中泰(福建)混凝土发展有限公司,泉州362021

出　　处：《建材世界》2018年第5期5-8,共4页The World of Building Materials

基　　金：福建省科技计划引导性项目(2017H0018);泉州市科技计划项目(2014Z126)

摘　　要：以不饱和两亲性脂肪醇聚氧乙烯醚(uAEO-x,x=3,30,80)、甲基丙烯酸、甲基烯丙基聚氧乙烯醚为原料,常温下合成了系列具有两亲性结构侧链的新型聚羧酸类引气剂pAEO-x。该文研究了AEO中亲水性链段长度对起泡容量、气泡稳定性及其对混凝土强度的影响。结果表明:pAEO-x中醚链段的重复单元x=30时,其水溶液在24h后仍有25.7%的泡沫残余,气泡容量和稳定性明显好于x=3和80;pAEO-x在混凝土拌合物中的应用显示,随AEO中醚段x=3增至30,80,混凝土拌合物60min经时坍落度先增加后减少,28d强度降低约3%。Series of polycarboxylic acid-based air-entrainment agents （pAEO- x ） containing amphipathic fatty alcohol-polyoxyethylene ether were obtained at normal temperature via the copolymerization of unsaturated fatty alcohol-polyoxyethylene ether （uAEO- x,x =3,30,80）,methacrylic acid and methyl allyl-polyoxyethylene ether.Influence of the polyoxyethylene ether units x in AEO on the foam ability,stability and strength of the concrete were investigated.Results show that when repeating unit of ether segment in pAEO- x x is equal to 30,the surfactant pAEO-30 has higher foaming performance compared with its analogues of pAEO-3/-80 respectively,and 25.7% of residual foam would be existed even after 24 h.With segment of the polyoxyethylene ether from 3 to 30,80,time-loss of slump constant for concrete mixture 60 min first increase and then decrease,while the compressive strengths of the 28 d harden concretes show 3% decrease.

关 键 词：引气剂 脂肪醇聚氧乙烯醚 坍落度损失 

分 类 号：TU528[建筑科学—建筑技术科学]