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多元组分早强型聚羧酸减水剂的 合成与应用

作者：余奇1，任天旺2，李瑞2，李事力3，舒福昌1，吴洪特1

关键字：多元,组,分,早强型,聚,羧酸,减,水剂,的,合成,

　
（1.长江大学，化学与环境工程学院，湖北 荆州  434023；2.宁夏新华轩高新技术有限公司，宁夏 吴忠  751100；
3.浙江广天构件股份有限公司，浙江 宁波  315021）
 
    摘要：将功能大单体OXVR-404V60与多元组分功能小单体利用结构上各基团的性能优势进行组合，设计合成了一系列具有早强性能的减水剂。试验结果表明，当配合比为n（OXVR-404V60）∶n（AA）∶n（DMC）=1.0∶4.0∶0.2时，合成减水剂的早强性能较优，但保坍性略显不足；再加入HEA合成了具有一定保坍性能的四元组分早强型减水剂，性能较好的配合比为：n（OXVR-404V60）∶n（AA）∶n（DMC）∶
n（HEA）=1.0∶4.0∶0.2∶0.2，混凝土应用试验结果表明，掺该早强型聚羧酸减水剂的混凝土和易性与早期强度均优于市售同类产品。
    关键词：早强；早强聚羧酸减水剂；多元组分；功能单体
    中图分类号：TU528.042+.2        文献标识码：A        文章编号：1001-702X（2020）01-0128-03
 
Synthesis and application of multi-component early strength polycarboxylate water reducer
YU Qi1，REN Tianwang2，LI Rui2，LI Shili3，SHU Fuchang1，WU Hongte1
（1.College of Chemistry and Environmental Engineering，Yangtze University，Jingzhou 434023，China；
2.Ningxia Xinhuaxuan High-tech Co. Ltd.，Wuzhong 751100，China；
3.Zhejiang Guangtian Component Co. Ltd.，Ningbo 315021，China）
    Abstact：The functional macromonomer OXVR-404V60 was selected，and the multi-component functional small monomer was combined with the performance advantages of each group in the structure to synthesize a series of water-reducing agents with early strength properties. The water reducing agent with the ratio of n（OXVR-404V60）∶n（AA）∶n（DMC）=1.0∶4.0∶0.2 has better early strength performance，but the moisture retention is slightly insufficient. By adding HEA，a quaternary component early strength water reducing agent with certain guaranteed properties was synthesized. The water-reducing agent with better ratio n（OXVR-404V60）∶n（AA）∶n（DMC）∶n（HEA）=1.0∶4.0∶0.2∶0.2 has better concrete workability and early strength than the commercial products，which
better meet the engineering application.
    Key words：early strength，early strength polycarboxylate water reducer，multi-component，functional monomer