Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
The invention relates to a slump-retaining polycarboxylate superplasticizer and a preparation method thereof.The slump-retaining polycarboxylate superplasticizer is prepared from, by weight, 8-12 parts of modified brassinolide, 5-10 parts of polycarboxylate superplasticizer, 5-10 parts of polycarboxylate superplasticizer, 5-10 parts of polycarboxylate superplasticizer, 1-3 parts of water reducer, 1-3 parts of water reducer and 1-3 parts of water reducer. 340 to 400 parts of an unsaturated polyether monomer; 14-18 parts of an unsaturated carboxylic acid monomer; 36-40 parts of a functional monomer; 2.6 to 3.0 parts of an oxidizing agent; 1.4 to 1.6 parts of a reducing agent; 0.3 to 0.5 part of a chain transfer agent; and 4-8 parts of a pH regulator. The modified brassinolide is introduced, on one hand, hydrophilic groups obtained through hydrolysis of ester groups can supplement carboxyl consumed in cement paste, and on the other hand, the adsorption and dispersion capacity is further improved through polyhydroxy and long-chain structures contained in the modified brassinolide. The water-reducing and slump-retaining polycarboxylic acid water reducer can improve the problems of high mixing amount, serious loss and the like of concrete admixtures, has both water-reducing and slump-retaining properties, and does not influence the strength of concrete. In addition, the water reducer has good adaptability with common water reducing agents, water-retaining agents, defoaming agents and other auxiliaries.
本发明涉及一种保坍型聚羧酸减水剂及其制备方法，一种保坍型聚羧酸减水剂，以重量份数计，所述保坍型聚羧酸减水剂的制备原料包括：改性芸苔素内酯8‑12份；不饱和聚醚单体340‑400份；不饱和羧酸单体14‑18份；功能单体36‑40份；氧化剂2.6‑3.0份；还原剂1.4‑1.6份；链转移剂0.3‑0.5份；以及pH调节剂4‑8份。本发明引入改性芸苔素内酯，一方面酯基水解的亲水基团可以补充水泥浆体中消耗的羧基，另一方面其含有的多羟基和长链结构，也进一步增大了吸附分散能力。本发明的减水保坍型聚羧酸减水剂能改善混凝土外加剂掺量高、损失严重等问题，兼顾减水与保坍性能，且不影响混凝土强度。此外与普通减水型减水剂、保水剂、消泡剂等助剂有较好适应性。
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
The invention relates to a slump-retaining polycarboxylate superplasticizer and a preparation method thereof.The slump-retaining polycarboxylate superplasticizer is prepared from, by weight, 8-12 parts of modified brassinolide, 5-10 parts of polycarboxylate superplasticizer, 5-10 parts of polycarboxylate superplasticizer, 5-10 parts of polycarboxylate superplasticizer, 1-3 parts of water reducer, 1-3 parts of water reducer and 1-3 parts of water reducer. 340 to 400 parts of an unsaturated polyether monomer; 14-18 parts of an unsaturated carboxylic acid monomer; 36-40 parts of a functional monomer; 2.6 to 3.0 parts of an oxidizing agent; 1.4 to 1.6 parts of a reducing agent; 0.3 to 0.5 part of a chain transfer agent; and 4-8 parts of a pH regulator. The modified brassinolide is introduced, on one hand, hydrophilic groups obtained through hydrolysis of ester groups can supplement carboxyl consumed in cement paste, and on the other hand, the adsorption and dispersion capacity is further improved through polyhydroxy and long-chain structures contained in the modified brassinolide. The water-reducing and slump-retaining polycarboxylic acid water reducer can improve the problems of high mixing amount, serious loss and the like of concrete admixtures, has both water-reducing and slump-retaining properties, and does not influence the strength of concrete. In addition, the water reducer has good adaptability with common water reducing agents, water-retaining agents, defoaming agents and other auxiliaries.
本发明涉及一种保坍型聚羧酸减水剂及其制备方法，一种保坍型聚羧酸减水剂，以重量份数计，所述保坍型聚羧酸减水剂的制备原料包括：改性芸苔素内酯8‑12份；不饱和聚醚单体340‑400份；不饱和羧酸单体14‑18份；功能单体36‑40份；氧化剂2.6‑3.0份；还原剂1.4‑1.6份；链转移剂0.3‑0.5份；以及pH调节剂4‑8份。本发明引入改性芸苔素内酯，一方面酯基水解的亲水基团可以补充水泥浆体中消耗的羧基，另一方面其含有的多羟基和长链结构，也进一步增大了吸附分散能力。本发明的减水保坍型聚羧酸减水剂能改善混凝土外加剂掺量高、损失严重等问题，兼顾减水与保坍性能，且不影响混凝土强度。此外与普通减水型减水剂、保水剂、消泡剂等助剂有较好适应性。
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
一种保坍型聚羧酸减水剂及其制备方法
ZHOU LONGJIE (Autor:in) / WANG ZHAOPENG (Autor:in) / LAI HUAZHEN (Autor:in) / CHEN ZHANHUA (Autor:in) / FANG YUNHUI (Autor:in) / GUO YUANQIANG (Autor:in) / ZHANG BIN (Autor:in) / QIU YUETAO (Autor:in) / LI WEITENG (Autor:in) / ZHAO HAINENG (Autor:in)
08.03.2024
Patent
Elektronische Ressource
Chinesisch
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
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Slump-retaining polycarboxylate superplasticizer and preparation method thereof
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Slump-retaining polycarboxylate superplasticizer and preparation method thereof
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2023