Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-sensitivity high-slump-retaining shrinkage-reducing type polycarboxylic acid water reducer and preparation method thereof
The invention relates to the field of concrete admixtures, and particularly discloses a low-sensitivity high-slump-retaining shrinkage-reducing type polycarboxylate superplasticizer and a preparation method thereof. The water reducing agent is prepared from the following components: 150 to 200 parts of polyether macromonomer, 5 to 10 parts of unsaturated ester monomer, 20 to 30 parts of unsaturated carboxylic acid monomer, 5 to 8 parts of self-made benzenesulfonic acid butenedioic acid monoester functional monomer, 8 to 10 parts of amide functional monomer, 1 to 3 parts of ferrous sulfate-hydrogen peroxide mixture, 0.5 to 1.5 parts of reducing agent, 0.4 to 0.9 part of chain transfer agent and 3 to 6 parts of pH (Potential of Hydrogen) regulator, and water is added to dilute to 250 to 300 parts. Through molecular design and interaction and synergistic effect between chain segments and functional groups after polymerization of different monomers, the water reducing agent can be directly applied to concrete at a low mixing amount, has good adaptability and low sensitivity with components in the concrete, can improve the rebound resistance and crack resistance of the concrete, and enables the concrete to maintain high slump.
本发明涉及混凝土外加剂领域，具体公开一种低敏感高保坍减缩型聚羧酸减水剂及其制备方法。该减水剂包括以下组分：聚醚类大单体150～200份，不饱和酯类单体5～10份，不饱和羧酸类单体20～30份，自制的苯磺酸丁烯二酸单酯功能单体5～8份，酰胺类功能单体8～10份，硫酸亚铁‑过氧化氢混合物1～3份，还原剂0.5～1.5份，链转移剂0.4～0.9份，pH调节剂3～6份，加水稀释至250～300份。该减水剂通过分子设计、不同单体聚合后链段和官能团之间的相互作用与协同作用，能够以较低掺量直接应用于混凝土中，与混凝土中各组分具有良好的适应性，敏感性低、可以提高混凝土抗回弹、抗裂性能，且使混凝土保持高的坍落度。
Low-sensitivity high-slump-retaining shrinkage-reducing type polycarboxylic acid water reducer and preparation method thereof
The invention relates to the field of concrete admixtures, and particularly discloses a low-sensitivity high-slump-retaining shrinkage-reducing type polycarboxylate superplasticizer and a preparation method thereof. The water reducing agent is prepared from the following components: 150 to 200 parts of polyether macromonomer, 5 to 10 parts of unsaturated ester monomer, 20 to 30 parts of unsaturated carboxylic acid monomer, 5 to 8 parts of self-made benzenesulfonic acid butenedioic acid monoester functional monomer, 8 to 10 parts of amide functional monomer, 1 to 3 parts of ferrous sulfate-hydrogen peroxide mixture, 0.5 to 1.5 parts of reducing agent, 0.4 to 0.9 part of chain transfer agent and 3 to 6 parts of pH (Potential of Hydrogen) regulator, and water is added to dilute to 250 to 300 parts. Through molecular design and interaction and synergistic effect between chain segments and functional groups after polymerization of different monomers, the water reducing agent can be directly applied to concrete at a low mixing amount, has good adaptability and low sensitivity with components in the concrete, can improve the rebound resistance and crack resistance of the concrete, and enables the concrete to maintain high slump.
本发明涉及混凝土外加剂领域，具体公开一种低敏感高保坍减缩型聚羧酸减水剂及其制备方法。该减水剂包括以下组分：聚醚类大单体150～200份，不饱和酯类单体5～10份，不饱和羧酸类单体20～30份，自制的苯磺酸丁烯二酸单酯功能单体5～8份，酰胺类功能单体8～10份，硫酸亚铁‑过氧化氢混合物1～3份，还原剂0.5～1.5份，链转移剂0.4～0.9份，pH调节剂3～6份，加水稀释至250～300份。该减水剂通过分子设计、不同单体聚合后链段和官能团之间的相互作用与协同作用，能够以较低掺量直接应用于混凝土中，与混凝土中各组分具有良好的适应性，敏感性低、可以提高混凝土抗回弹、抗裂性能，且使混凝土保持高的坍落度。
Low-sensitivity high-slump-retaining shrinkage-reducing type polycarboxylic acid water reducer and preparation method thereof
一种低敏感高保坍减缩型聚羧酸减水剂及其制备方法
PAN FAN (Autor:in) / YANG LINLIN (Autor:in) / PAN DUANYANG (Autor:in)
26.05.2023
Patent
Elektronische Ressource
Chinesisch
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