Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sodium carboxymethyl starch-based concrete internal curing material and preparation method thereof
The invention discloses a sodium carboxymethyl starch-based concrete internal curing material and a preparation method thereof. The internal curing material has an obvious three-dimensional network structure, wherein the pore size is 50-100 microns. The preparation method comprises the following steps: (1) adding 1.3-2.4% of sodium carboxymethyl starch and water into a reaction kettle, heating and stirring; (2) preparing 5.0-6.8% of a functional monomer into a solution; (3) preparing a sodium acrylate solution with a neutralization degree of 50-80% by using a neutralizing agent with a concentration of 20-40%, cooling, and adding 0.01-0.3% of an initiator and 0.005-0.03% of a cross-linking agent to obtain a solution A; and (4) adding the solution obtained in the step (2) into a reaction kettle, keeping the temperature for 10-30 minutes, adding the solution A, keeping the temperature for 1-3 hours, washing, drying and grinding. According to the invention, the prepared internal curing material absorbs 313-480 g/g of tap water, the water release rate is 58-78%, the 28d compressive strength of mortar is improved by 12.95% at most, the performance is superior to that of similar products in the market, the internal curing material has good water absorption-water release performance, and the strength of the mortar is not reduced; and te preparation process is simple, the production period is short, and large-scale production is easy to realize.
本发明公开了一种羧甲基淀粉钠基混凝土内养护材料及其制备方法，此内养护材料具有明显的三维网络结构，孔尺寸50～100μm。制备方法如下：(1)将1.3％～2.4％羧甲基淀粉钠和水加入反应釜中加热搅拌；(2)将5.0％～6.8％功能性单体配成溶液；(3)用20％～40％浓度的中和剂配制中和度为50％～80％的丙烯酸钠溶液，冷却后加入0.01％～0.3％引发剂和0.005％～0.03％交联剂得A液；(4)将步骤(2)溶液加入反应釜，保温10～30min加入A液，保温1～3h，洗涤、干燥、粉磨即得。本发明制备的内养护材料吸自来水313～480g/g，释水率58％～78％，砂浆28d抗压强度最高提高12.95％，性能优于市场同类产品，具有较好吸水‑释水性能且不降低砂浆强度。本发明制备工艺简单，生产周期短，易于实现规模化生产。
Sodium carboxymethyl starch-based concrete internal curing material and preparation method thereof
The invention discloses a sodium carboxymethyl starch-based concrete internal curing material and a preparation method thereof. The internal curing material has an obvious three-dimensional network structure, wherein the pore size is 50-100 microns. The preparation method comprises the following steps: (1) adding 1.3-2.4% of sodium carboxymethyl starch and water into a reaction kettle, heating and stirring; (2) preparing 5.0-6.8% of a functional monomer into a solution; (3) preparing a sodium acrylate solution with a neutralization degree of 50-80% by using a neutralizing agent with a concentration of 20-40%, cooling, and adding 0.01-0.3% of an initiator and 0.005-0.03% of a cross-linking agent to obtain a solution A; and (4) adding the solution obtained in the step (2) into a reaction kettle, keeping the temperature for 10-30 minutes, adding the solution A, keeping the temperature for 1-3 hours, washing, drying and grinding. According to the invention, the prepared internal curing material absorbs 313-480 g/g of tap water, the water release rate is 58-78%, the 28d compressive strength of mortar is improved by 12.95% at most, the performance is superior to that of similar products in the market, the internal curing material has good water absorption-water release performance, and the strength of the mortar is not reduced; and te preparation process is simple, the production period is short, and large-scale production is easy to realize.
本发明公开了一种羧甲基淀粉钠基混凝土内养护材料及其制备方法，此内养护材料具有明显的三维网络结构，孔尺寸50～100μm。制备方法如下：(1)将1.3％～2.4％羧甲基淀粉钠和水加入反应釜中加热搅拌；(2)将5.0％～6.8％功能性单体配成溶液；(3)用20％～40％浓度的中和剂配制中和度为50％～80％的丙烯酸钠溶液，冷却后加入0.01％～0.3％引发剂和0.005％～0.03％交联剂得A液；(4)将步骤(2)溶液加入反应釜，保温10～30min加入A液，保温1～3h，洗涤、干燥、粉磨即得。本发明制备的内养护材料吸自来水313～480g/g，释水率58％～78％，砂浆28d抗压强度最高提高12.95％，性能优于市场同类产品，具有较好吸水‑释水性能且不降低砂浆强度。本发明制备工艺简单，生产周期短，易于实现规模化生产。
Sodium carboxymethyl starch-based concrete internal curing material and preparation method thereof
一种羧甲基淀粉钠基混凝土内养护材料及其制备方法
LIU RONGJIN (Autor:in) / CHEN MEIHUA (Autor:in) / CHEN PING (Autor:in) / GAO TIANYU (Autor:in) / WAN DANDAN (Autor:in) / LU FUHUA (Autor:in) / WANG JINGYANG (Autor:in)
18.02.2022
Patent
Elektronische Ressource
Chinesisch
Internal curing concrete and preparation method thereof
| Europäisches Patentamt | 2024
Internal curing concrete and preparation method thereof
| Europäisches Patentamt | 2024
Concrete reinforced water-retaining internal curing material and preparation method thereof
| Europäisches Patentamt | 2015
Concrete internal curing agent and preparation method thereof
| Europäisches Patentamt | 2024
Concrete internal curing agent and preparation method thereof
| Europäisches Patentamt | 2024