早强快凝型聚羧酸减水剂的制备与性能研究.pdfVIP

学兔兔 圃 钎癯建蟓 中国科技核心期刊 早强快凝型聚菝酸减水剂的 制备与性能研究 陈亚萍，杨廷雄，宋冬生，胡泊 (江西省建筑材料工业科学研究设计院 江西迪特科技有限公司，江西 南昌 330001) 摘要：为满足聚羧酸减水剂在某些有早强要求的建筑工程中应用，合成了早强快凝型聚羧酸减水剂 通过正交试验得到分散 性良好的聚羧酸减水剂，其最佳配比为n(TPEG)：n(MA)：n(乙酸乙烯酯)=O．05：0．3：0．1：另外，采用AM取代部分MA，得出取代20％ MA对提高混凝土早强效果最佳。通过与其它3种样品比较，掺自制早强快凝型聚羧酸减水剂的混凝土具有较短的凝结时间，较低 的含气量和较好的流动性，还可明显提高混凝土的早期强度。 关键词：聚羧酸减水剂：早强；合成 中图分类号：TU528．042 文献标识码：A 文章编号：1001—702X(2013)02—0009—03 Research on synthesis and performance of an early strength and fast solidification type of polycarboxylate superplasticizer · CHEN Yaping，YANG Tingxiong，SONG Dongsheng，HU Po (Building Material Industry Science Research and Design Institute of jiangxi Province， Jiangxi Dt Technology Co．Ltd．，Nanchang 330001，Jiangxi，China) Abstract：In order to satisfy the application of polycarboxylate superplasticizer in the early strength constructional engineer- ing，the fast solidification and early strength type of polycarboxylate superplasticizer was developed．Polycarboxylate superplasticizer with good dispersibility was prepared by orthogonal test，the results showed that the best moral ratio of TPEG，MA and vinyl ae- etate was 0．05：0．3：0．1．Moreover，20％ replacement rate of AM had good early strength effect．Compared with three other samples， the concrete by adding the homemade sample had shorter setting time，lower air content and better fluidity，which could significant- ly improve the early strength． Key words：polycarboxylate superplasticizer；early strength；synthesis 聚羧酸减水剂具有掺量低、减水性能优异、保坍性好等优 期水化速率，进而提高水泥混凝土的早期强