聚羧酸系减水剂用于水下不分散混凝土的研究.pdfVIP

学兔兔 2012年第 2期(总第 268期 ) 混 凝 土 实 用 技 术 Number 2 in 2012(Total No．268) Concrete PRACTICAL TECHN0LOGY doi：10．3969~．issn．1002—3550．2012．02．037 聚羧酸系减水剂用于水下不分散混凝土的研究 陈国新，杜志芹，杨 日，徐唯唯，沈燕平。祝烨然 (南京水利科学研究院 瑞迪高新技术公司，江苏 南京 210024) 摘 要：聚羧酸系减水剂作为新一代高性能减水剂，用其配制水下不分散混凝土，可以充分发挥其低掺量、高减水率、良好的流动度保 持性、良好的增强效果等优点。试验对比了掺聚羧酸系高性能减水剂(Gx)、萘系高效减水剂(FDlN)和氨基磺酸系高效减水剂(As)水下不 分散混凝土的流动度、流动度保持性、用水量和抗压强度，结果表明掺加GX的水下不分散混凝土其各项性能更优。 关键词：聚羧酸系减水剂；水下不分散；混凝土；流动度；强度 中图分类号：TU528．042．2 文献标志码：A 文章编号： 1002—3550(2012)02—0117—02 Study on application of polycarboxylate superplasticizer in anti—washout concrete CHENGuo—xin，DUZhi—qin，YANGRi，XUWei—we／，SHENYah-ping，ZHUYe，ran (NanjingHydraulicResearchInstitute，Nanjing210024，China) Abstract： As a new type high performance water reducer，the polycarboxylate superplasticizer has many advantages such as low dosagehigh ， water reducing rate，good fluidity retention and good strength increasing capacity．The fluidity,fluidity retention，water consumption and compression strength of anti—washout concrete added with polycarboxylate superplasticizer(GX)，naphthalene sulfate based superplasticizer (FDN)or aminosulfonic acid-based superplasticizer(AS)are tested and compared．The results indicate that the anti—washout concr~e added with GX has the best performances． Key words：polycarboxylate superplasticizer；anti-washout；concrete；flowability；strength 0 引言 效果必须加入缓凝剂，这样会使混凝土凝结时间更长，早期强度