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Polycarboxylate superplasticizer for low-powder-content machine-made sand concrete and preparation method thereof
The invention discloses a polycarboxylic acid water reducing agent for low-powder-content machine-made sand concrete. The polycarboxylic acid water reducing agent comprises an unsaturated polyether macromonomer, an unsaturated carboxylic acid monomer, an amide monomer, a crosslinking type functional monomer, an oxidizing agent, a chain transfer agent and a reducing agent, the molar ratio of the unsaturated polyether macromonomer to the unsaturated carboxylic acid monomer to the amide monomer to the crosslinking type functional monomer is 1: (2-3.5): (0.2-0.6): (0.7-1.5), the dosage of the oxidant is 0.3%-0.8% of the total mass of the unsaturated polyether macromonomer, and the dosage of the reducing agent is 0.1%-0.3% of the total mass of the unsaturated polyether macromonomer. The use amount of the chain transfer agent is 0.2%-0.5% of the total mass of the unsaturated polyether macromonomer. The invention also discloses a preparation method of the polycarboxylic acid water reducer for the low-powder-content machine-made sand concrete. The polycarboxylic acid water reducer for the low-powder-content machine-made sand concrete contains the cross-linked functional monomer, has certain thickening and slurry extracting effects, effectively solves the problems of poor cohesiveness, easy bleeding and the like of the concrete aiming at the low-powder-content machine-made sand, and ensures production control and quality safety.
本发明公开了一种低含粉机制砂混凝土的聚羧酸减水剂，包括不饱和聚醚大单体、不饱和羧酸单体、酰胺类单体、交联型功能单体、氧化剂、链转移剂以及还原剂；不饱和聚醚大单体、不饱和羧酸单体、酰胺类单体和交联型功能单体的摩尔比为1:2‑3.5:0.2‑0.6:0.7‑1.5，氧化剂的用量为不饱和聚醚大单体总质量的0.3％‑0.8％，还原剂的用量为不饱和聚醚大单体总质量的0.1％‑0.3％，链转移剂的用量为不饱和聚醚大单体总质量的0.2％‑0.5％。本发明还公开了一种低含粉机制砂混凝土的聚羧酸减水剂的制备方法。本发明的低含粉机制砂混凝土的聚羧酸减水剂包含交联型功能单体，具有一定的增稠、提浆作用，针对低含粉机制砂，有效解决混凝土粘聚性差、易泌水等问题，保证生产控制及质量安全。
Polycarboxylate superplasticizer for low-powder-content machine-made sand concrete and preparation method thereof
The invention discloses a polycarboxylic acid water reducing agent for low-powder-content machine-made sand concrete. The polycarboxylic acid water reducing agent comprises an unsaturated polyether macromonomer, an unsaturated carboxylic acid monomer, an amide monomer, a crosslinking type functional monomer, an oxidizing agent, a chain transfer agent and a reducing agent, the molar ratio of the unsaturated polyether macromonomer to the unsaturated carboxylic acid monomer to the amide monomer to the crosslinking type functional monomer is 1: (2-3.5): (0.2-0.6): (0.7-1.5), the dosage of the oxidant is 0.3%-0.8% of the total mass of the unsaturated polyether macromonomer, and the dosage of the reducing agent is 0.1%-0.3% of the total mass of the unsaturated polyether macromonomer. The use amount of the chain transfer agent is 0.2%-0.5% of the total mass of the unsaturated polyether macromonomer. The invention also discloses a preparation method of the polycarboxylic acid water reducer for the low-powder-content machine-made sand concrete. The polycarboxylic acid water reducer for the low-powder-content machine-made sand concrete contains the cross-linked functional monomer, has certain thickening and slurry extracting effects, effectively solves the problems of poor cohesiveness, easy bleeding and the like of the concrete aiming at the low-powder-content machine-made sand, and ensures production control and quality safety.
本发明公开了一种低含粉机制砂混凝土的聚羧酸减水剂，包括不饱和聚醚大单体、不饱和羧酸单体、酰胺类单体、交联型功能单体、氧化剂、链转移剂以及还原剂；不饱和聚醚大单体、不饱和羧酸单体、酰胺类单体和交联型功能单体的摩尔比为1:2‑3.5:0.2‑0.6:0.7‑1.5，氧化剂的用量为不饱和聚醚大单体总质量的0.3％‑0.8％，还原剂的用量为不饱和聚醚大单体总质量的0.1％‑0.3％，链转移剂的用量为不饱和聚醚大单体总质量的0.2％‑0.5％。本发明还公开了一种低含粉机制砂混凝土的聚羧酸减水剂的制备方法。本发明的低含粉机制砂混凝土的聚羧酸减水剂包含交联型功能单体，具有一定的增稠、提浆作用，针对低含粉机制砂，有效解决混凝土粘聚性差、易泌水等问题，保证生产控制及质量安全。
Polycarboxylate superplasticizer for low-powder-content machine-made sand concrete and preparation method thereof
一种低含粉机制砂混凝土的聚羧酸减水剂及其制备方法
BI YAO (author) / LIU WENKANG (author) / CHEN JING (author) / LIU QIBIN (author) / WANG SHAOFENG (author) / HAN WUJUN (author) / ZHOU HUI (author) / CAI XIN (author) / CHEN CAI (author)
2023-06-30
Patent
Electronic Resource
Chinese
| European Patent Office | 2020
| European Patent Office | 2022
| European Patent Office | 2023
| European Patent Office | 2023