减缩型聚羧酸系减水剂SRPC-7的合成与性能研究

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发布时间：2020-01-06 00:00:00

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减缩型聚羧酸系减水剂SRPC-7的合成与性能研究

Study on Synthesis and Properties of Shrinkage Reducing Polycarboxylate Superplasticizer SRPC-7

2021年第2期

减缩；合成；表面张力；聚羧酸系减水剂

Shrinkage reducing; Synthesis; Surface tension; Polycarboxylate superplasticizer

2021年第2期

10.19761/j.1000-4637.2021.02.005.04

北京市自然科学基金资助项目（8182014）。

李崇智，曹莹莹，牛振山，吴慧华

北京建筑大学土木与交通工程学院，北京 102600

李崇智，曹莹莹，牛振山，吴慧华

李崇智,曹莹莹,牛振山,等.减缩型聚羧酸系减水剂SRPC-7的合成与性能研究[J].混凝土与水泥制品,2021(2):5-7,12.

LI C Z,CAO Y Y,NIU Z S,et al.Study on Synthesis and Properties of Shrinkage Reducing Polycarboxylate Superplasticizer SRPC-7[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):5-7,12.

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摘要：合成了马来酸二乙二醇单丁醚的酯类单体，将其与甲基烯丙基聚乙二醇和丙烯酸（AA）、甲基丙烯磺酸钠（MAS）、过硫酸铵（APS）等共聚成一种具有良好分散性与保坍能力的减缩型聚羧酸系减水剂SRPC-7。结果表明：2.0%的SRPC-7溶液表面张力为35.2 mN/m，低于普通聚羧酸系减水剂PC的表面张力（53.9 mN/m）；掺两种聚羧酸减水剂的砂浆与混凝土试件收缩率均低于空白组，掺SRPC-7的砂浆试件28 d收缩率下降了39.5%，掺SRPC-7的混凝土试件28 d收缩率比为55.4%，SRPC-7有利于提高混凝土的抗收缩开裂性能。 Abstract: The ester monomer of maleic acid diethylene glycol monobutyl ether was synthesized, and it was combined with methallyl polyethylene glycol, acrylic acid(AA), sodium methacrylate sulfonate(MAS), ammonium persulfate(APS) and other copolymerization into a shrinkage reducing polycarboxylate superplasticizer SRPC-7, which had good dispersibility and slump retention ability. The results show that the surface tension of the 2.0% SRPC-7 solution is 35.2 mN/m, which is far lower than the 53.9 mN/m of polycarboxylate superplasticizer PC. The shrinkage of the mortar and concrete mixed with PC is lower than that of the blank sample. The 28 d shrinkage rate of the cement mortar test block mixed with SRPC-7 decreases by 39.5%, and the 28 d shrinkage ratio of the concrete mixed with SRPC-7 is 55.4% of the blank group, which is conducive to the shrinkage and cracking resistance of concrete.

英文名 : Study on Synthesis and Properties of Shrinkage Reducing Polycarboxylate Superplasticizer SRPC-7

刊期 : 2021年第2期

关键词 : 减缩；合成；表面张力；聚羧酸系减水剂

Key words : Shrinkage reducing; Synthesis; Surface tension; Polycarboxylate superplasticizer

刊期 : 2021年第2期

DOI : 10.19761/j.1000-4637.2021.02.005.04

文章编号 :

基金项目 : 北京市自然科学基金资助项目（8182014）。

作者 : 李崇智，曹莹莹，牛振山，吴慧华

单位 : 北京建筑大学土木与交通工程学院，北京 102600

李崇智，曹莹莹，牛振山，吴慧华

李崇智,曹莹莹,牛振山,等.减缩型聚羧酸系减水剂SRPC-7的合成与性能研究[J].混凝土与水泥制品,2021(2):5-7,12.

LI C Z,CAO Y Y,NIU Z S,et al.Study on Synthesis and Properties of Shrinkage Reducing Polycarboxylate Superplasticizer SRPC-7[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):5-7,12.

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引用本文

Abstract: The ester monomer of maleic acid diethylene glycol monobutyl ether was synthesized, and it was combined with methallyl polyethylene glycol, acrylic acid(AA), sodium methacrylate sulfonate(MAS), ammonium persulfate(APS) and other copolymerization into a shrinkage reducing polycarboxylate superplasticizer SRPC-7, which had good dispersibility and slump retention ability. The results show that the surface tension of the 2.0% SRPC-7 solution is 35.2 mN/m, which is far lower than the 53.9 mN/m of polycarboxylate superplasticizer PC. The shrinkage of the mortar and concrete mixed with PC is lower than that of the blank sample. The 28 d shrinkage rate of the cement mortar test block mixed with SRPC-7 decreases by 39.5%, and the 28 d shrinkage ratio of the concrete mixed with SRPC-7 is 55.4% of the blank group, which is conducive to the shrinkage and cracking resistance of concrete.

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减缩型聚羧酸系减水剂SRPC-7的合成与性能研究

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