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A platform for research: civil engineering, architecture and urbanism
Super-early-strength shrinkage-reducing type polycarboxylic acid water reducer as well as preparation method and application of super-early-strength shrinkage-reducing type polycarboxylic acid water reducer
The invention provides a super-early-strength shrinkage-reducing polycarboxylate-type water reducer, which is prepared by initiating a polymerization reaction of monomers in an aqueous solution by an oxidant and a reducing agent at normal and low temperature, and neutralizing by a neutralizing modifier, and the monomers comprise the following components in parts by weight: 20-55 parts of ethylene glycol vinyl polyethylene glycol ether, 10-20 parts of a water reducer, 10-20 parts of a water reducer and 10-20 parts of a water reducer. The polymerization reaction comprises the following components in parts by weight: 20-55 parts of methacrylic acid polyethylene glycol monoester, 2.5-7.5 parts of unsaturated carboxylic acid monomer, 0.1-1.5 parts of unsaturated sulfonic acid or salt thereof and 0.1-0.5 part of silane coupling agent monomer, and a chain transfer agent is also adopted in the polymerization reaction. The water reducer enables concrete to have 1-3-day early strength or super-early-strength shrinkage-reducing and crack-resisting effects, is friendly to the use environment and harmless to human bodies, and has the advantages of micro air entraining capacity, good dispersity and low surface tension.
本发明提供了一种超早强减缩型聚羧酸系减水剂，该减水剂由氧化剂和还原剂在常低温情况下引发单体在水溶液中进行聚合反应，再经中和改性剂中和而成，单体按重量份计包括：乙二醇乙烯基聚乙二醇醚20‑55份，甲基丙烯酸聚乙二醇单酯20‑55份，不饱和羧酸单体2.5‑7.5份，不饱和磺酸或其盐0.1‑1.5份，硅烷偶联剂单体0.1‑0.5份，聚合反应还采用了链转移剂。该减水剂使混凝土具有1‑3天的早强或超早强减缩抗裂效果，使用环境友好、对人身体无害，具有微引气量性、分散性好、低表面张力的优点。
Super-early-strength shrinkage-reducing type polycarboxylic acid water reducer as well as preparation method and application of super-early-strength shrinkage-reducing type polycarboxylic acid water reducer
The invention provides a super-early-strength shrinkage-reducing polycarboxylate-type water reducer, which is prepared by initiating a polymerization reaction of monomers in an aqueous solution by an oxidant and a reducing agent at normal and low temperature, and neutralizing by a neutralizing modifier, and the monomers comprise the following components in parts by weight: 20-55 parts of ethylene glycol vinyl polyethylene glycol ether, 10-20 parts of a water reducer, 10-20 parts of a water reducer and 10-20 parts of a water reducer. The polymerization reaction comprises the following components in parts by weight: 20-55 parts of methacrylic acid polyethylene glycol monoester, 2.5-7.5 parts of unsaturated carboxylic acid monomer, 0.1-1.5 parts of unsaturated sulfonic acid or salt thereof and 0.1-0.5 part of silane coupling agent monomer, and a chain transfer agent is also adopted in the polymerization reaction. The water reducer enables concrete to have 1-3-day early strength or super-early-strength shrinkage-reducing and crack-resisting effects, is friendly to the use environment and harmless to human bodies, and has the advantages of micro air entraining capacity, good dispersity and low surface tension.
本发明提供了一种超早强减缩型聚羧酸系减水剂，该减水剂由氧化剂和还原剂在常低温情况下引发单体在水溶液中进行聚合反应，再经中和改性剂中和而成，单体按重量份计包括：乙二醇乙烯基聚乙二醇醚20‑55份，甲基丙烯酸聚乙二醇单酯20‑55份，不饱和羧酸单体2.5‑7.5份，不饱和磺酸或其盐0.1‑1.5份，硅烷偶联剂单体0.1‑0.5份，聚合反应还采用了链转移剂。该减水剂使混凝土具有1‑3天的早强或超早强减缩抗裂效果，使用环境友好、对人身体无害，具有微引气量性、分散性好、低表面张力的优点。
Super-early-strength shrinkage-reducing type polycarboxylic acid water reducer as well as preparation method and application of super-early-strength shrinkage-reducing type polycarboxylic acid water reducer
一种超早强减缩型聚羧酸系减水剂及其制备方法和应用
DOU RENGUO (author) / LI CHONGZHI (author) / HUANG SHAN (author) / WANG QIN (author) / MU JUN (author) / LI XINGZHOU (author) / GONG CHAO (author) / HAN XIANGLI (author) / GUO ZHENDONG (author) / YIN CHANGSHUN (author)
2024-05-10
Patent
Electronic Resource
Chinese
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