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Starch-polycarboxylic acid composite slump-retaining water reducing agent and application thereof
The invention discloses a starch-polycarboxylic acid composite slump-retaining water reducing agent and application thereof.The starch-polycarboxylic acid composite slump-retaining water reducing agent is prepared from, by weight, 250-300 parts of polyether macromonomer, 140-210 parts of water, 0.8-1.2 parts of ammonium persulfate, 20-30 parts of acrylic acid and 5-10 parts of starch through a double bond addition-graft copolymerization reaction, and the starch-polycarboxylic acid composite slump-retaining water reducing agent is prepared from, by weight, 250-300 parts of polyether macromonomer, 140-210 parts of water, 0.8-1.2 parts of ammonium persulfate, 20-30 parts of acrylic acid and 5-10 parts of starch. The coating is prepared from the following components in parts by weight: 5-10 parts of acrylic ester, 5-10 parts of a silane coupling agent, 0.3-0.4 part of mercaptoethanol and 0.2-0.3 part of vitamin C. The starch-polycarboxylic acid composite slump-retaining water reducing agent with a starch chain segment, a siloxane group and an acrylate group is synthesized by blocking a polyether macromonomer, acrylate, acrylic acid, a silane coupling agent and a starch substance, and the starch-polycarboxylic acid composite slump-retaining water reducing agent is mixed into concrete. Good slump retaining performance, water retention performance and compressive strength can be brought to concrete.
本发明公开了一种淀粉‑聚羧酸复合保坍减水剂及其应用，其中，淀粉‑聚羧酸复合保坍减水剂由如下重量份的组分通过双键加成‑接枝共聚反应制得：聚醚大单体250‑300重量份，水140‑210重量份，过硫酸铵0.8‑1.2重量份，丙烯酸20‑30重量份，淀粉5‑10重量份，丙烯酸酯5‑10重量份，硅烷偶联剂5‑10重量份，巯基乙醇0.3‑0.4重量份，维生素C0.2‑0.3重量份。本发明通过将聚醚大单体、丙烯酸酯、丙烯酸、硅烷偶联剂和淀粉类物质进行嵌段，合成了的一种具有淀粉链段、硅氧烷基团和丙烯酸酯基团的淀粉‑聚羧酸复合保坍减水剂，该淀粉‑聚羧酸复合保坍减水剂混入混凝土中，能够为混凝土带来良好的保坍性能、保水性能和抗压强度。
Starch-polycarboxylic acid composite slump-retaining water reducing agent and application thereof
The invention discloses a starch-polycarboxylic acid composite slump-retaining water reducing agent and application thereof.The starch-polycarboxylic acid composite slump-retaining water reducing agent is prepared from, by weight, 250-300 parts of polyether macromonomer, 140-210 parts of water, 0.8-1.2 parts of ammonium persulfate, 20-30 parts of acrylic acid and 5-10 parts of starch through a double bond addition-graft copolymerization reaction, and the starch-polycarboxylic acid composite slump-retaining water reducing agent is prepared from, by weight, 250-300 parts of polyether macromonomer, 140-210 parts of water, 0.8-1.2 parts of ammonium persulfate, 20-30 parts of acrylic acid and 5-10 parts of starch. The coating is prepared from the following components in parts by weight: 5-10 parts of acrylic ester, 5-10 parts of a silane coupling agent, 0.3-0.4 part of mercaptoethanol and 0.2-0.3 part of vitamin C. The starch-polycarboxylic acid composite slump-retaining water reducing agent with a starch chain segment, a siloxane group and an acrylate group is synthesized by blocking a polyether macromonomer, acrylate, acrylic acid, a silane coupling agent and a starch substance, and the starch-polycarboxylic acid composite slump-retaining water reducing agent is mixed into concrete. Good slump retaining performance, water retention performance and compressive strength can be brought to concrete.
本发明公开了一种淀粉‑聚羧酸复合保坍减水剂及其应用，其中，淀粉‑聚羧酸复合保坍减水剂由如下重量份的组分通过双键加成‑接枝共聚反应制得：聚醚大单体250‑300重量份，水140‑210重量份，过硫酸铵0.8‑1.2重量份，丙烯酸20‑30重量份，淀粉5‑10重量份，丙烯酸酯5‑10重量份，硅烷偶联剂5‑10重量份，巯基乙醇0.3‑0.4重量份，维生素C0.2‑0.3重量份。本发明通过将聚醚大单体、丙烯酸酯、丙烯酸、硅烷偶联剂和淀粉类物质进行嵌段，合成了的一种具有淀粉链段、硅氧烷基团和丙烯酸酯基团的淀粉‑聚羧酸复合保坍减水剂，该淀粉‑聚羧酸复合保坍减水剂混入混凝土中，能够为混凝土带来良好的保坍性能、保水性能和抗压强度。
Starch-polycarboxylic acid composite slump-retaining water reducing agent and application thereof
一种淀粉-聚羧酸复合保坍减水剂及其应用
GUO PENGFEI (author) / YU YANHUA (author) / HUANG YONGYI (author)
2024-05-28
Patent
Electronic Resource
Chinese
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