低分子量磷酸基减水剂的合成、性能及应用研究

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发布时间：2020-01-06 00:00:00

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低分子量磷酸基减水剂的合成、性能及应用研究

Synthesis, Properties and Application of Low Molecular Weight Phosphate Group Water Reducer

2023年第1期

聚氧乙烯醚；磷酸基团；分散保持；黏土敏感性；水化

MPEG; Phosphate group; Dispersion retention; Clay sensitivity; Hydration

2023年第1期

10.19761/j.1000-4637.2023.01.011.05

国家杰出青年基金项目（51825203）；国家自然科学基金青年基金项目（52102022）。

韩正，黄振，王兵，王涛

江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室，江苏南京211103

韩正，黄振，王兵，王涛

韩正,黄振,王兵,等.低分子量磷酸基减水剂的合成、性能及应用研究[J].混凝土与水泥制品,2023(1):11-14,20.

HAN Z,HUANG Z,WANG B,et al.Synthesis, Properties and Application of Low Molecular Weight Phosphate Group Water Reducer[J].China Concrete and Cement Products,2023(1):11-14,20.

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摘要：以聚乙二醇单甲醚（MPEG-2000）作为主链，磷酸作为末端吸附基团，合成了低分子磷酸基减水剂PM-2，分析了红外吸收光谱、凝胶渗透色谱，并研究了PM-2的分散性能、黏土敏感性、水泥对其的吸附性、对水泥水化热的影响及在混凝土中的应用效果。结果表明：与聚羧酸减水剂PCE-1相比，所制备的PM-2的分散性保持能力强，黏土敏感性低，水泥颗粒对其的吸附量少，同时具有一定的延缓水泥水化的效果，但减水效果相对较低；通过PCE-1和PM-2复配可以显著提升混凝土的坍落度及其保持能力，且不会降低混凝土强度。 Abstract: A low molecular weight phosphate based water reducer was synthesized by using polyethylene glycol monomethyl ether (MPEG-2000) as the main chain and phosphoric acid as the terminal adsorption group. The molecular structure and molecular weight were determined by IR and GPC. The dispersion property of PM-2, clay sensitivity, adsorption of cement, influence on cement hydration heat and application effect in concrete were studied. The results show that, compared with polycarboxylic acid water reducer PCE-1, the prepared PM-2 has strong dispersion retention ability, low clay sensitivity, less adsorption capacity of cement particles, and has a certain effect of delaying cement hydration, but the water reducing effect is relatively low. By mixing PCE-1 and PM-2, the concrete slump and its retention capacity can be significantly improved without reducing the concrete strength.

英文名 : Synthesis, Properties and Application of Low Molecular Weight Phosphate Group Water Reducer

刊期 : 2023年第1期

关键词 : 聚氧乙烯醚；磷酸基团；分散保持；黏土敏感性；水化

Key words : MPEG; Phosphate group; Dispersion retention; Clay sensitivity; Hydration

刊期 : 2023年第1期

DOI : 10.19761/j.1000-4637.2023.01.011.05

文章编号 :

基金项目 : 国家杰出青年基金项目（51825203）；国家自然科学基金青年基金项目（52102022）。

作者 : 韩正，黄振，王兵，王涛

单位 : 江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室，江苏南京211103

韩正，黄振，王兵，王涛

韩正,黄振,王兵,等.低分子量磷酸基减水剂的合成、性能及应用研究[J].混凝土与水泥制品,2023(1):11-14,20.

HAN Z,HUANG Z,WANG B,et al.Synthesis, Properties and Application of Low Molecular Weight Phosphate Group Water Reducer[J].China Concrete and Cement Products,2023(1):11-14,20.

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摘要

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结论

参考文献

引用本文

Abstract: A low molecular weight phosphate based water reducer was synthesized by using polyethylene glycol monomethyl ether (MPEG-2000) as the main chain and phosphoric acid as the terminal adsorption group. The molecular structure and molecular weight were determined by IR and GPC. The dispersion property of PM-2, clay sensitivity, adsorption of cement, influence on cement hydration heat and application effect in concrete were studied. The results show that, compared with polycarboxylic acid water reducer PCE-1, the prepared PM-2 has strong dispersion retention ability, low clay sensitivity, less adsorption capacity of cement particles, and has a certain effect of delaying cement hydration, but the water reducing effect is relatively low. By mixing PCE-1 and PM-2, the concrete slump and its retention capacity can be significantly improved without reducing the concrete strength.

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低分子量磷酸基减水剂的合成、性能及应用研究