早强型聚羧酸系减水剂的制备及其性能试验研究.pdfVIP

学兔兔 圃 新 建巍 中国科技核心期刊 早强型聚菝酸系减水剂的 制备及其性能试验研究 唐修生，黄国泓，祝烨然，温金保，高欣欣 (南京水利科学研究院 瑞迪高新技术有限公司，江苏 南京 210024) 摘要：介绍了一种具有早强、高减水性能的聚羧酸系减水剂(HLC—PCE)的一步法制备方法，与常规聚羧酸系减水剂HW进行 了性能对比，并探讨了养护温度为10℃和20℃条件下其对高掺量矿物掺合料混凝土(单掺3O％粉煤灰或单掺50％磨细矿渣)的1 d 抗压强度的影响．。结果表明：HLC—PCE减水性能优异，折固掺量为0．30％时，其混凝土减水率在40％以上；早强效果明显，特别适用 于高掺量矿物掺合料混凝土的早期增强。 。 关键词：聚羧酸系减水剂；早强；高掺量矿物掺合料；混凝土 中图分类号：TU528．042．2 文献标识码：B 文章编号：1001—702X(2013)05—0011-03 Research on synthesis and performance of early-strength polycarboxylate superplasticizer TANG Xiusheng，HUANG Guohong，ZHU Yeran，WEN Jinb∞，GA0 Xinxin (Nanjing RD High Technology Co．Ltd．，Nanjing Hydranlic Research Institute，Nanjing 210024，Jiangsu，China) Abstract：This paper introduces a kind of polycarboxylate superplasticizer named HLC-PCE with early-strength and high water reducing functions synthesized by one step method．The performance of a conventional polycarboxylate superplasticizer HW was compared with HLC—PCE，and the effect on one—day compressive strength of concrete with high volume mineral admixtures (single compound with 30％ fly ash or 50％ ground granulated blast furnace slag)was discussed with condition of the curing temperature of 10 oC and 20℃．The results show that the water reducing performance of HLC-PCE is excellent。the concrete water reducing rate is more than 40％ when the solid volume is O．30％，early-strength effect is obvious，and especially suitable for the early strength enhancement of h J gh volume mineral admixture concrete． Key words：polycarboxylate superplasticizer；early-strength；high volume mineral admixture；concrete