A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention relates to the technical field of water reducing agents, in particular to a slow-release high-slump-retaining water reducing agent and a preparation method thereof. Comprising the following raw materials in parts by mass: 800-1000 parts of a polyether macromonomer, 20-40 parts of acrylic acid, 60-80 parts of isopentene phthalate, 50-70 parts of sodium methallyl sulfonate, 5-15 parts of a redox initiator, 30-60 parts of a chain transfer agent and 3000-5000 parts of deionized water. The water reducing agent slowly releases carboxyl and sulfonic acid groups in an alkaline environment of concrete, the fluidity of the concrete is kept for a long time, the ester group hydrolysis speed is lower, long-time slow release can be achieved, good slow release and high collapse protection performance are achieved, meanwhile, the later adsorption-dispersion capacity of the polycarboxylic acid water reducing agent is improved, and the service life of the water reducing agent is prolonged. Therefore, the slump loss of the concrete is slowed down.
本发明涉及减水剂技术领域，具体涉及一种缓释高保塌型减水剂及其制备方法。包括以下质量份数的原料为聚醚大单体800～1000份、丙烯酸20～40份、邻苯二甲酸异戊烯酯60～80份、甲基丙烯磺酸钠50～70份、氧化还原引发剂5～15份、链转移剂30～60份、去离子水3000～5000份；本发明减水剂在混凝土的碱性环境中缓慢水释放出羧基和磺酸基，长时间保持混凝土的流动性，且酯基水解的速度更慢，能够更长时间的缓释，具有较好的缓释和高保塌性能，同时提高聚羧酸系减水剂后期的吸附‑分散能力，从而减缓混凝土的坍落度损失。
The invention relates to the technical field of water reducing agents, in particular to a slow-release high-slump-retaining water reducing agent and a preparation method thereof. Comprising the following raw materials in parts by mass: 800-1000 parts of a polyether macromonomer, 20-40 parts of acrylic acid, 60-80 parts of isopentene phthalate, 50-70 parts of sodium methallyl sulfonate, 5-15 parts of a redox initiator, 30-60 parts of a chain transfer agent and 3000-5000 parts of deionized water. The water reducing agent slowly releases carboxyl and sulfonic acid groups in an alkaline environment of concrete, the fluidity of the concrete is kept for a long time, the ester group hydrolysis speed is lower, long-time slow release can be achieved, good slow release and high collapse protection performance are achieved, meanwhile, the later adsorption-dispersion capacity of the polycarboxylic acid water reducing agent is improved, and the service life of the water reducing agent is prolonged. Therefore, the slump loss of the concrete is slowed down.
本发明涉及减水剂技术领域，具体涉及一种缓释高保塌型减水剂及其制备方法。包括以下质量份数的原料为聚醚大单体800～1000份、丙烯酸20～40份、邻苯二甲酸异戊烯酯60～80份、甲基丙烯磺酸钠50～70份、氧化还原引发剂5～15份、链转移剂30～60份、去离子水3000～5000份；本发明减水剂在混凝土的碱性环境中缓慢水释放出羧基和磺酸基，长时间保持混凝土的流动性，且酯基水解的速度更慢，能够更长时间的缓释，具有较好的缓释和高保塌性能，同时提高聚羧酸系减水剂后期的吸附‑分散能力，从而减缓混凝土的坍落度损失。
Slow-release high-slump-retaining type water reducing agent and preparation method thereof
一种缓释高保塌型减水剂及其制备方法
HE WUSHUN (author)
2022-03-29
Patent
Electronic Resource
Chinese
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