A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fast-dispersion viscosity-reduction type polycarboxylic acid water reducing agent as well as preparation method and application of fast-dispersion viscosity-reduction type polycarboxylic acid water reducing agent
The invention provides a fast-dispersion viscosity-reduction type polycarboxylic acid water reducer as well as a preparation method and application thereof. The fast-dispersion viscosity-reduction type polycarboxylic acid water reducing agent is obtained through copolymerization of a polyether macromonomer, an unsaturated ester monomer, an unsaturated acid monomer and styrene, the monomers are distributed on a water reducing agent molecular chain in a stepped mode, the polyether macromonomer and the unsaturated ester monomer are concentrated on one side of the water reducing agent molecular chain, and the unsaturated ester monomer and the styrene are concentrated on the other side of the water reducing agent molecular chain. The unsaturated acid monomer and the styrene monomer are concentrated on the other side of the molecular chain of the water reducing agent. The water reducer provided by the invention has the advantages of large water reduction and long slump loss resistance in high-strength concrete, and has the effect of reducing viscosity; in addition, the fresh concrete can quickly reach the maximum expansion degree, the stirring time of a production enterprise is saved, the production efficiency is improved, and in addition, the phenomenon that the fluidity of the concrete is reversely increased due to the low temperature can be inhibited; the water reducer is produced by adopting a one-pot method, is simple in process and is suitable for large-scale industrial production.
本发明提供了一种快分散降粘型聚羧酸减水剂、其制备方法及应用。本发明所述快分散降粘型聚羧酸减水剂是由聚醚大单体、不饱和酯单体、不饱和酸单体、苯乙烯通过共聚反应得到的，这些单体在减水剂分子链上呈阶梯分布，所述聚醚大单体和不饱和酯单体集中于减水剂分子链的一侧，所述不饱和酸单体和苯乙烯单体集中于减水剂分子链的另一侧。本发明所述减水剂在高强混凝土中具有大减水、长保坍的优点，并具有降低粘度的效果；且能够快速地使新拌混凝土达到最大的扩展度，节约生产企业的搅拌时间，提高生产效率，此外还能抑制由于温度偏低导致的混凝土流动度反增长的现象；本发明减水剂采用一锅法生产，工艺简单，适合规模化工业生产。
Fast-dispersion viscosity-reduction type polycarboxylic acid water reducing agent as well as preparation method and application of fast-dispersion viscosity-reduction type polycarboxylic acid water reducing agent
The invention provides a fast-dispersion viscosity-reduction type polycarboxylic acid water reducer as well as a preparation method and application thereof. The fast-dispersion viscosity-reduction type polycarboxylic acid water reducing agent is obtained through copolymerization of a polyether macromonomer, an unsaturated ester monomer, an unsaturated acid monomer and styrene, the monomers are distributed on a water reducing agent molecular chain in a stepped mode, the polyether macromonomer and the unsaturated ester monomer are concentrated on one side of the water reducing agent molecular chain, and the unsaturated ester monomer and the styrene are concentrated on the other side of the water reducing agent molecular chain. The unsaturated acid monomer and the styrene monomer are concentrated on the other side of the molecular chain of the water reducing agent. The water reducer provided by the invention has the advantages of large water reduction and long slump loss resistance in high-strength concrete, and has the effect of reducing viscosity; in addition, the fresh concrete can quickly reach the maximum expansion degree, the stirring time of a production enterprise is saved, the production efficiency is improved, and in addition, the phenomenon that the fluidity of the concrete is reversely increased due to the low temperature can be inhibited; the water reducer is produced by adopting a one-pot method, is simple in process and is suitable for large-scale industrial production.
本发明提供了一种快分散降粘型聚羧酸减水剂、其制备方法及应用。本发明所述快分散降粘型聚羧酸减水剂是由聚醚大单体、不饱和酯单体、不饱和酸单体、苯乙烯通过共聚反应得到的，这些单体在减水剂分子链上呈阶梯分布，所述聚醚大单体和不饱和酯单体集中于减水剂分子链的一侧，所述不饱和酸单体和苯乙烯单体集中于减水剂分子链的另一侧。本发明所述减水剂在高强混凝土中具有大减水、长保坍的优点，并具有降低粘度的效果；且能够快速地使新拌混凝土达到最大的扩展度，节约生产企业的搅拌时间，提高生产效率，此外还能抑制由于温度偏低导致的混凝土流动度反增长的现象；本发明减水剂采用一锅法生产，工艺简单，适合规模化工业生产。
Fast-dispersion viscosity-reduction type polycarboxylic acid water reducing agent as well as preparation method and application of fast-dispersion viscosity-reduction type polycarboxylic acid water reducing agent
一种快分散降粘型聚羧酸减水剂、其制备方法及应用
LI SHENTONG (author) / RAN QIANPING (author) / HONG JINXIANG (author) / ZHOU DONGLIANG (author) / LI SHENZHEN (author) / YAN HAN (author) / WANG TAO (author) / ZHANG JIANGANG (author)
2023-06-20
Patent
Electronic Resource
Chinese
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