Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-water-reducing and high-slump-retaining type polycarboxylic acid water reducing agent and preparation method thereof
The invention discloses a high-water-reduction and high-slump-loss-resistant polycarboxylic acid water reducer which comprises an unsaturated polyether macromonomer, an unsaturated carboxylic acid monomer, an alkyne ester monomer, an oxidizing agent, a reducing agent and a chain transfer agent, the molar ratio of the unsaturated polyether macromonomer to the unsaturated carboxylic acid monomer to the alkyne ester monomer is 1: (0.5-3.5): (0.1-2.5), the dosage of the oxidant is 0.1%-1.5% of the total mass of the unsaturated polyether macromonomer, the dosage of the reducing agent is 0.1%-2.0% of the total mass of the unsaturated polyether macromonomer, and the dosage of the chain transfer agent is 0.1%-1.2% of the total mass of the unsaturated polyether macromonomer. The invention further discloses a preparation method of the high-water-reducing and high-slump-retaining type polycarboxylic acid water reducing agent. The polycarboxylate superplasticizer has a rigid structure and hydrolytic groups at the same time, the slump retaining effect of concrete can be greatly improved, meanwhile, the strength of the concrete can be improved, the sensitivity of the polycarboxylate superplasticizer can be reduced, and the negative effects of different concrete materials on the polycarboxylate superplasticizer and the concrete can be weakened.
本发明公开了一种高减水高保坍型聚羧酸减水剂，包括不饱和聚醚大单体、不饱和羧酸单体、炔类酯单体、氧化剂、还原剂以及链转移剂；不饱和聚醚大单体、不饱和羧酸单体和炔类酯单体的摩尔比为1:0.5‑3.5:0.1‑2.5，氧化剂的用量为不饱和聚醚大单体总质量的0.1％‑1.5％，还原剂的用量为不饱和聚醚大单体总质量的0.1％‑2.0％，链转移剂的用量为不饱和聚醚大单体总质量的0.1％‑1.2％。本发明还公开了一种高减水高保坍型聚羧酸减水剂的制备方法。本发明的聚羧酸减水剂同时具有刚性结构和水解基团，可大大提高混凝土的保坍效果，同时还能提高混凝土的强度和降低聚羧酸减水剂的敏感性，弱化不同混凝土材料对聚羧酸减水剂及混凝土的负面影响。
High-water-reducing and high-slump-retaining type polycarboxylic acid water reducing agent and preparation method thereof
The invention discloses a high-water-reduction and high-slump-loss-resistant polycarboxylic acid water reducer which comprises an unsaturated polyether macromonomer, an unsaturated carboxylic acid monomer, an alkyne ester monomer, an oxidizing agent, a reducing agent and a chain transfer agent, the molar ratio of the unsaturated polyether macromonomer to the unsaturated carboxylic acid monomer to the alkyne ester monomer is 1: (0.5-3.5): (0.1-2.5), the dosage of the oxidant is 0.1%-1.5% of the total mass of the unsaturated polyether macromonomer, the dosage of the reducing agent is 0.1%-2.0% of the total mass of the unsaturated polyether macromonomer, and the dosage of the chain transfer agent is 0.1%-1.2% of the total mass of the unsaturated polyether macromonomer. The invention further discloses a preparation method of the high-water-reducing and high-slump-retaining type polycarboxylic acid water reducing agent. The polycarboxylate superplasticizer has a rigid structure and hydrolytic groups at the same time, the slump retaining effect of concrete can be greatly improved, meanwhile, the strength of the concrete can be improved, the sensitivity of the polycarboxylate superplasticizer can be reduced, and the negative effects of different concrete materials on the polycarboxylate superplasticizer and the concrete can be weakened.
本发明公开了一种高减水高保坍型聚羧酸减水剂，包括不饱和聚醚大单体、不饱和羧酸单体、炔类酯单体、氧化剂、还原剂以及链转移剂；不饱和聚醚大单体、不饱和羧酸单体和炔类酯单体的摩尔比为1:0.5‑3.5:0.1‑2.5，氧化剂的用量为不饱和聚醚大单体总质量的0.1％‑1.5％，还原剂的用量为不饱和聚醚大单体总质量的0.1％‑2.0％，链转移剂的用量为不饱和聚醚大单体总质量的0.1％‑1.2％。本发明还公开了一种高减水高保坍型聚羧酸减水剂的制备方法。本发明的聚羧酸减水剂同时具有刚性结构和水解基团，可大大提高混凝土的保坍效果，同时还能提高混凝土的强度和降低聚羧酸减水剂的敏感性，弱化不同混凝土材料对聚羧酸减水剂及混凝土的负面影响。
High-water-reducing and high-slump-retaining type polycarboxylic acid water reducing agent and preparation method thereof
一种高减水高保坍型聚羧酸减水剂及其制备方法
BI YAO (Autor:in) / SHANG JIAQI (Autor:in) / CHEN JING (Autor:in) / LIU QIBIN (Autor:in) / WANG SHAOFENG (Autor:in) / ZHOU JIQIAN (Autor:in) / YIN YI (Autor:in) / WANG LUJIN (Autor:in) / CHEN JIN (Autor:in)
13.12.2022
Patent
Elektronische Ressource
Chinesisch
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Slump-retaining polycarboxylic acid water reducing agent and preparation method thereof
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