聚羧酸减水剂中使用引气剂的研究.pdfVIP

学兔兔 2010年第 7期(总第 249期 ) 混 凝 土 原材料及辅助物料 Number 7 in 2010(Total No．249) Concrete MATERIAI，AND ADMINICLE doi：10．3969~．issn．1002-3550．2010．07．032 聚羧酸减水剂中使用引气剂的研究 陈峭卉’，梁 晖 ，徐卓涛。 (1．广东省建筑材料研究院，广东 广州 510160；2．中山大学 化学与化学工程学院，广东 广州 510275； 3．江门市中建科技开发有限公司，广东 江门 529040) 摘 要：研究、开发了一种多离子结构的聚羧酸减水剂中使用引气剂。简要介绍了它的合成工艺、分子结构表征、对混凝土性能和结构的 影响。这种引气剂掺量小、引入的气泡泡径小、配剂的混凝土和易性好、泌水少、对强度的降低小。已经在上百万立方米混凝土用聚羧酸和 萘系减水剂中应用。 关键词：引气剂；聚羧酸减水剂；混凝土 中图分类号：TU528．042．4 文献标志码：A 文章编号： 1002—3550(2010)07—0098—04 Study on an air-entraining agent for pOIycarboxyIate—type water-reducer CHE fQiao-hui ．LIANGHui2,XUZhuo—tao (1．GuangdongBuildingMaterialResearchInstitute，Guangzhou 510160，China；2．School ofChemistry andChemicalEngineering，SunYat—sen University，Guangzhou 510275，China；3．ZhongjianTechnologyExploitationCo．，Ltd．，Jiangmen 529040，China) Abstract： An air-entraining agent for polycarboxylate—type water-reducer with polyionic structure was studied and exploited to application．The synthetic procedure，structure characterization ofthe air-entraining agent was introduced，and the effects ofthe air-entraining agent on the structure and prope~ies of concrete were investigated．This air-entraining agent has several advantages，such as low level of addition required，small diame— ter ofthe air bubble entrained，good workability ofconcrete compounded，small concrete bleeding rate，slight reduction to the concrete strength． The air—entraining agent has been applied in over million steres ofconcrete using polycarboxylate—type or naphthalene series water—reducer．