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A platform for research: civil engineering, architecture and urbanism
Reaction air-entraining type polycarboxylate water reducer and preparation method thereof
The invention discloses a reaction air-entraining type polycarboxylate water reducer and a preparation method thereof. The main component of the reaction air-entraining type polycarboxylate water reducer is a random copolymer prepared from polyethylene glycol ether and acrylic acid through an aqueous solution free radical polymerization reaction. According to the water reducer, ammonia gas can bereleased by utilizing an alkaline environment of cement hydration; the water reducer has air entraining and water reducing effects and is good in water reducing effect, when the mixing amount of the water reducer is 0.1%-0.3%, the water reducing rate is 20%-40%, the air content is increased by 1%-4%, the flowability of concrete can be remarkably improved, the segregation resistance and bleeding resistance of the concrete can be improved, and the workability of the concrete can be improved.
本发明公开了一种反应引气型聚羧酸减水剂及其制备方法，所述反应引气型聚羧酸减水剂的主要成分为聚乙二醇醚和丙烯酸通过水溶液自由基聚合反应制备得到的无规共聚物。该减水剂可利用水泥水化的碱性环境释放氨气，兼具引气和减水的作用，减水效果好，当该减水剂的掺量为0.1％～0.3％时，减水率为20～40％，含气量增加1～4％，能显著提高混凝土的流动性，并可提升混凝土抗离析、抗泌水能力，改善混凝土和易性。
Reaction air-entraining type polycarboxylate water reducer and preparation method thereof
The invention discloses a reaction air-entraining type polycarboxylate water reducer and a preparation method thereof. The main component of the reaction air-entraining type polycarboxylate water reducer is a random copolymer prepared from polyethylene glycol ether and acrylic acid through an aqueous solution free radical polymerization reaction. According to the water reducer, ammonia gas can bereleased by utilizing an alkaline environment of cement hydration; the water reducer has air entraining and water reducing effects and is good in water reducing effect, when the mixing amount of the water reducer is 0.1%-0.3%, the water reducing rate is 20%-40%, the air content is increased by 1%-4%, the flowability of concrete can be remarkably improved, the segregation resistance and bleeding resistance of the concrete can be improved, and the workability of the concrete can be improved.
本发明公开了一种反应引气型聚羧酸减水剂及其制备方法，所述反应引气型聚羧酸减水剂的主要成分为聚乙二醇醚和丙烯酸通过水溶液自由基聚合反应制备得到的无规共聚物。该减水剂可利用水泥水化的碱性环境释放氨气，兼具引气和减水的作用，减水效果好，当该减水剂的掺量为0.1％～0.3％时，减水率为20～40％，含气量增加1～4％，能显著提高混凝土的流动性，并可提升混凝土抗离析、抗泌水能力，改善混凝土和易性。
Reaction air-entraining type polycarboxylate water reducer and preparation method thereof
一种反应引气型聚羧酸减水剂及其制备方法
TAN HONGBO (author) / GUO WENBIN (author) / MA BAOGUO (author) / LI XIANGGUO (author) / JIAN SHOUWEI (author) / HUANG JIAN (author)
2020-11-20
Patent
Electronic Resource
Chinese
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