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A platform for research: civil engineering, architecture and urbanism
Polycarboxylic acid concrete water reducing agent as well as preparation method and application thereof
The invention provides a polycarboxylic acid concrete water reducing agent as well as a preparation method and application thereof. The polycarboxylic acid concrete water reducing agent comprises the following raw materials: unsaturated polyoxyethylene ether, a polymeric monomer, an initiator and a chain transfer agent, the polymeric monomer comprises a first monomer and a second monomer; the first monomer comprises a combination of acrylic acid, sodium allylsulfonate and isobutylene alcohol; the second monomer includes a combination of hydroxyethyl methylacrylate, hydroxypropyl acrylate, and 2-ethylhexyl acrylate. According to the polycarboxylic acid concrete water reducing agent, the first monomer and the second monomer which are specifically combined are selected, so that the polycarboxylic acid concrete water reducing agent is small in mixing amount, high in water reducing rate, capable of improving the flowability of cement paste and prolonging the setting time, small in slump loss, high in concrete compression resistance, appropriate in gas content, simple in preparation process and suitable for industrial production. The cost is low;
本发明提供了一种聚羧酸混凝土减水剂及其制备方法和应用。所述聚羧酸混凝土减水剂的原料包括不饱和聚氧乙烯醚、聚合单体、引发剂和链转移剂；所述聚合单体包括第一单体和第二单体；所述第一单体包括丙烯酸、丙烯磺酸钠和异丁烯醇的组合；所述第二单体包括甲基丙烯酸羟乙酯、丙烯酸羟丙酯和丙烯酸异辛酯的组合。本发明中，所述聚羧酸混凝土减水剂通过选用特定组合的第一单体和第二单体，使得所述聚羧酸混凝土减水剂掺量少，减水率高，能够提高水泥浆体的流动性、延长凝结时间，坍落度损失小，混凝土抗压能力强、含气量适宜，且制备工艺简单，成本低，环保。
Polycarboxylic acid concrete water reducing agent as well as preparation method and application thereof
The invention provides a polycarboxylic acid concrete water reducing agent as well as a preparation method and application thereof. The polycarboxylic acid concrete water reducing agent comprises the following raw materials: unsaturated polyoxyethylene ether, a polymeric monomer, an initiator and a chain transfer agent, the polymeric monomer comprises a first monomer and a second monomer; the first monomer comprises a combination of acrylic acid, sodium allylsulfonate and isobutylene alcohol; the second monomer includes a combination of hydroxyethyl methylacrylate, hydroxypropyl acrylate, and 2-ethylhexyl acrylate. According to the polycarboxylic acid concrete water reducing agent, the first monomer and the second monomer which are specifically combined are selected, so that the polycarboxylic acid concrete water reducing agent is small in mixing amount, high in water reducing rate, capable of improving the flowability of cement paste and prolonging the setting time, small in slump loss, high in concrete compression resistance, appropriate in gas content, simple in preparation process and suitable for industrial production. The cost is low;
本发明提供了一种聚羧酸混凝土减水剂及其制备方法和应用。所述聚羧酸混凝土减水剂的原料包括不饱和聚氧乙烯醚、聚合单体、引发剂和链转移剂；所述聚合单体包括第一单体和第二单体；所述第一单体包括丙烯酸、丙烯磺酸钠和异丁烯醇的组合；所述第二单体包括甲基丙烯酸羟乙酯、丙烯酸羟丙酯和丙烯酸异辛酯的组合。本发明中，所述聚羧酸混凝土减水剂通过选用特定组合的第一单体和第二单体，使得所述聚羧酸混凝土减水剂掺量少，减水率高，能够提高水泥浆体的流动性、延长凝结时间，坍落度损失小，混凝土抗压能力强、含气量适宜，且制备工艺简单，成本低，环保。
Polycarboxylic acid concrete water reducing agent as well as preparation method and application thereof
一种聚羧酸混凝土减水剂及其制备方法和应用
LI TAO (author) / LIANG WANCHANG (author) / WEI SIYUE (author) / LIU QIPENG (author) / GUO ZHOUHAI (author)
2022-11-11
Patent
Electronic Resource
Chinese
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