Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Retarding polycarboxylate superplasticizer and preparation method thereof
The invention discloses a delayed coagulation type polycarboxylate superplasticizer and a preparation method thereof, and relates to the field of concrete admixtures. The retarding type polycarboxylic acid water reducing agent is prepared from 45 to 55 parts of unsaturated polyether monomer, 15 to 20 parts of quaternary ammonium salt cationic monomer, 10 to 15 parts of unsaturated sulfonic acid or unsaturated sulfonate monomer, 5.5 to 7.5 parts of unsaturated phosphate monomer, 4.8 to 6.2 parts of unsaturated hydroxy fatty acid ester monomer, 100 to 120 parts of acrylic acid, 1 to 2 parts of chain transfer agent, 1.5 to 2 parts of oxidizing agent, 0.75 to 1 part of reducing agent and 500 parts of water. The structural general formula of the unsaturated polyether monomer is R1CH2O (CH2CH2O) nR2, R1 is an alkenyl group, and R2 is any one of a phenyl group and a phenylalanine alkyl ester group. The delayed coagulation type polycarboxylate superplasticizer can effectively improve the delayed coagulation effect of a concrete mixture with the fine aggregate mud content larger than 1.5% in a high-temperature environment, and constructability is ensured.
本申请公开了一种缓凝型聚羧酸减水剂及其制备方法，涉及混凝土外加剂领域。缓凝型聚羧酸减水剂包括45‑55份不饱和聚醚单体、15‑20份季铵盐阳离子单体、10‑15份不饱和磺酸或不饱和磺酸盐单体、5.5‑7.5份不饱和磷酸酯单体、4.8‑6.2份不饱和羟基脂肪酸酯单体、100‑120份丙烯酸、1‑2份链转移剂、1.5‑2份氧化剂、0.75‑1份还原剂以及500份水，所述不饱和聚醚单体的结构通式为R1CH2O(CH2CH2O)nR2，R1为烯基，R2为苯基、苯丙氨酸烷基酯基团中的任意一种。本申请的缓凝型聚羧酸减水剂能够有效提升细骨料含泥量大于1.5%的混凝土拌和物在高温环境中的缓凝效果，确保施工性。
Retarding polycarboxylate superplasticizer and preparation method thereof
The invention discloses a delayed coagulation type polycarboxylate superplasticizer and a preparation method thereof, and relates to the field of concrete admixtures. The retarding type polycarboxylic acid water reducing agent is prepared from 45 to 55 parts of unsaturated polyether monomer, 15 to 20 parts of quaternary ammonium salt cationic monomer, 10 to 15 parts of unsaturated sulfonic acid or unsaturated sulfonate monomer, 5.5 to 7.5 parts of unsaturated phosphate monomer, 4.8 to 6.2 parts of unsaturated hydroxy fatty acid ester monomer, 100 to 120 parts of acrylic acid, 1 to 2 parts of chain transfer agent, 1.5 to 2 parts of oxidizing agent, 0.75 to 1 part of reducing agent and 500 parts of water. The structural general formula of the unsaturated polyether monomer is R1CH2O (CH2CH2O) nR2, R1 is an alkenyl group, and R2 is any one of a phenyl group and a phenylalanine alkyl ester group. The delayed coagulation type polycarboxylate superplasticizer can effectively improve the delayed coagulation effect of a concrete mixture with the fine aggregate mud content larger than 1.5% in a high-temperature environment, and constructability is ensured.
本申请公开了一种缓凝型聚羧酸减水剂及其制备方法，涉及混凝土外加剂领域。缓凝型聚羧酸减水剂包括45‑55份不饱和聚醚单体、15‑20份季铵盐阳离子单体、10‑15份不饱和磺酸或不饱和磺酸盐单体、5.5‑7.5份不饱和磷酸酯单体、4.8‑6.2份不饱和羟基脂肪酸酯单体、100‑120份丙烯酸、1‑2份链转移剂、1.5‑2份氧化剂、0.75‑1份还原剂以及500份水，所述不饱和聚醚单体的结构通式为R1CH2O(CH2CH2O)nR2，R1为烯基，R2为苯基、苯丙氨酸烷基酯基团中的任意一种。本申请的缓凝型聚羧酸减水剂能够有效提升细骨料含泥量大于1.5%的混凝土拌和物在高温环境中的缓凝效果，确保施工性。
Retarding polycarboxylate superplasticizer and preparation method thereof
一种缓凝型聚羧酸减水剂及其制备方法
PENG YAMEI (Autor:in) / LIU JUANRONG (Autor:in)
28.01.2025
Patent
Elektronische Ressource
Chinesisch
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