A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of high-solid-content early-strength polycarboxylic acid slump retaining agent
The invention relates to a preparation method of a solid-content early-strength polycarboxylic acid slump retaining agent, which comprises the following steps: stirring unsaturated polyoxyethylene ether, an initiator and water until the unsaturated polyoxyethylene ether, the initiator and the water are completely dissolved, and then controlling the temperature to be 4444DEG C; and then adding unsaturated acid and ester, a redox agent, a chain transfer agent and an early-strength neutralizer to carry out free radical polymerization reaction. The solid content of the polycarboxylic acid slump retaining agent product is higher than that of a traditional polycarboxylic acid slump retaining agent product with the solid content being 44%, the production efficiency is high, the effective storage rate is high, the dispersion retaining capacity is high, the production process is environmentally friendly, the adopted early-strength neutralizer has the early-strength effect, the problem of concrete alkali efflorescence can be effectively solved, and the early strength and freezing resistance of concrete are improved.
本发明涉及本发明公开了一种固含早强型聚羧酸保坍剂的制备方法，所述高固含早强型聚羧酸保坍剂通过不饱和聚氧乙烯醚、引发剂、水搅拌完全溶解后，控温保持在44444℃，然后加入不饱和酸及酯、氧化还原剂、链转移剂和早强型中和剂进行自由基聚合反应制得。本发明聚羧酸保坍剂产品固含量高于传统的44％固含聚羧酸保坍剂产品，生产效率高，有效储存率高，分散保持能力强，生产过程绿色环保，所用早强型中和剂还有早强作用，并能有效改善混凝土返碱问题，提高混凝土早期强度和抗冻性。
Preparation method of high-solid-content early-strength polycarboxylic acid slump retaining agent
The invention relates to a preparation method of a solid-content early-strength polycarboxylic acid slump retaining agent, which comprises the following steps: stirring unsaturated polyoxyethylene ether, an initiator and water until the unsaturated polyoxyethylene ether, the initiator and the water are completely dissolved, and then controlling the temperature to be 4444DEG C; and then adding unsaturated acid and ester, a redox agent, a chain transfer agent and an early-strength neutralizer to carry out free radical polymerization reaction. The solid content of the polycarboxylic acid slump retaining agent product is higher than that of a traditional polycarboxylic acid slump retaining agent product with the solid content being 44%, the production efficiency is high, the effective storage rate is high, the dispersion retaining capacity is high, the production process is environmentally friendly, the adopted early-strength neutralizer has the early-strength effect, the problem of concrete alkali efflorescence can be effectively solved, and the early strength and freezing resistance of concrete are improved.
本发明涉及本发明公开了一种固含早强型聚羧酸保坍剂的制备方法，所述高固含早强型聚羧酸保坍剂通过不饱和聚氧乙烯醚、引发剂、水搅拌完全溶解后，控温保持在44444℃，然后加入不饱和酸及酯、氧化还原剂、链转移剂和早强型中和剂进行自由基聚合反应制得。本发明聚羧酸保坍剂产品固含量高于传统的44％固含聚羧酸保坍剂产品，生产效率高，有效储存率高，分散保持能力强，生产过程绿色环保，所用早强型中和剂还有早强作用，并能有效改善混凝土返碱问题，提高混凝土早期强度和抗冻性。
Preparation method of high-solid-content early-strength polycarboxylic acid slump retaining agent
高固含早强型聚羧酸保坍剂的制备方法
LI YEQING (author) / YUAN YUAN (author) / LI YUPENG (author) / YU SONGBAI (author) / CAO DONGPING (author) / YANG MO (author) / DENG QINGFU (author)
2022-07-08
Patent
Electronic Resource
Chinese
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