A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Super-long slump-retaining polycarboxylate superplasticizer and preparation method thereof
The invention belongs to the technical field of concrete additives, and particularly relates to a super-long slump-retaining polycarboxylate superplasticizer and a preparation method thereof. The water reducing agent is prepared from the following components: 280 to 300 parts of methyl allyl polyoxyethylene ether, 20 to 30 parts of acrylic acid, 10 to 12 parts of hydroxyethyl methylacrylate, 2 to 3 parts of 2-mercaptoethanol, 2.5 to 4 parts of lauryl mercaptan and 1.5 to 2.5 parts of ammonium persulfate. According to the water reducing agent prepared by the invention, hydroxyethyl methylacrylate is introduced, so that the length of a side chain of the polycarboxylic acid water reducing agent is controllably adjusted, the slump retaining effect of the polycarboxylic acid water reducing agent is enhanced, the compatibility with a cement base is good, and the construction performance of concrete is improved; the water reducing agent provided by the invention is high in water reducing rate, keeps good fluidity after being added into concrete, is good in slump retaining performance, can still keep good performance in a high-temperature operation environment, and is short in setting time.
本发明属于混凝土添加剂技术领域，具体涉及一种超长保坍型聚羧酸减水剂及其制备方法。该减水剂通过以下成分制备而成：甲基烯丙基聚氧乙烯醚280‑300份、丙烯酸20‑30份、甲基丙烯酸羟乙酯10‑12份、2‑巯基乙醇2‑3份、十二烷基硫醇2.5‑4份、过硫酸铵1.5‑2.5份。本发明制备的减水剂通过引入甲基丙烯酸羟乙酯，从而实现聚羧酸减水剂侧链的长度进行可控性调整，增强了聚羧酸减水剂保坍效果，同水泥基相容性好，提高了混凝土的施工性能；本发明提供的减水剂，减水率高，添加至混凝土后，保持良好的流动度、坍落度保持性能好，同时高温作业环境下，仍能够保持良好的性能，凝结时间短。
Super-long slump-retaining polycarboxylate superplasticizer and preparation method thereof
The invention belongs to the technical field of concrete additives, and particularly relates to a super-long slump-retaining polycarboxylate superplasticizer and a preparation method thereof. The water reducing agent is prepared from the following components: 280 to 300 parts of methyl allyl polyoxyethylene ether, 20 to 30 parts of acrylic acid, 10 to 12 parts of hydroxyethyl methylacrylate, 2 to 3 parts of 2-mercaptoethanol, 2.5 to 4 parts of lauryl mercaptan and 1.5 to 2.5 parts of ammonium persulfate. According to the water reducing agent prepared by the invention, hydroxyethyl methylacrylate is introduced, so that the length of a side chain of the polycarboxylic acid water reducing agent is controllably adjusted, the slump retaining effect of the polycarboxylic acid water reducing agent is enhanced, the compatibility with a cement base is good, and the construction performance of concrete is improved; the water reducing agent provided by the invention is high in water reducing rate, keeps good fluidity after being added into concrete, is good in slump retaining performance, can still keep good performance in a high-temperature operation environment, and is short in setting time.
本发明属于混凝土添加剂技术领域，具体涉及一种超长保坍型聚羧酸减水剂及其制备方法。该减水剂通过以下成分制备而成：甲基烯丙基聚氧乙烯醚280‑300份、丙烯酸20‑30份、甲基丙烯酸羟乙酯10‑12份、2‑巯基乙醇2‑3份、十二烷基硫醇2.5‑4份、过硫酸铵1.5‑2.5份。本发明制备的减水剂通过引入甲基丙烯酸羟乙酯，从而实现聚羧酸减水剂侧链的长度进行可控性调整，增强了聚羧酸减水剂保坍效果，同水泥基相容性好，提高了混凝土的施工性能；本发明提供的减水剂，减水率高，添加至混凝土后，保持良好的流动度、坍落度保持性能好，同时高温作业环境下，仍能够保持良好的性能，凝结时间短。
Super-long slump-retaining polycarboxylate superplasticizer and preparation method thereof
一种超长保坍型聚羧酸减水剂及其制备方法
HUANG LIJUN (author) / WANG RUOCHEN (author) / TONG LI (author) / HUANG QING (author) / ZHOU GUANGJUN (author)
2021-08-03
Patent
Electronic Resource
Chinese
Super-long slump-retaining polycarboxylate superplasticizer and preparation method thereof
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