A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Nano-composite super-early-strength polycarboxylate superplasticizer as well as preparation method and application thereof
The invention provides a nano-composite super-early-strength polycarboxylate superplasticizer and a preparation method and application thereof.The preparation method comprises the following steps that 1, a polyether macromonomer, a reducing agent, a functional monomer, an oxidizing agent and deionized water are added into a reaction container and stirred at the temperature of 25-45 DEG C till all the components are dissolved, and a reaction solution A is obtained; step 2, simultaneously dropwise adding an acrylic acid solution and a vitamin C aqueous solution into the reaction solution A in a stirring state at 25-45 DEG C, heating to 45-65 DEG C after dropwise adding is completed, carrying out a heat preservation reaction for a period of time, and adjusting a reaction system to be alkaline by using an alkaline compound and/or an aqueous solution of the alkaline compound to obtain a reaction solution B; and step 3, adding a calcium nitrate aqueous solution and a sodium silicate aqueous solution into the reaction solution B at 0-10 DEG C, and stirring to react for 30-60 minutes to obtain a finished product. The concrete early strength improver has the beneficial effects that the early strength of concrete is remarkably improved, the mixing amount is low, the water-reducing rate is high, the slump loss resistance is strong, the mud resistance is good, the preparation method is simple in process, the energy consumption is low, the production period is short, and industrial production is easy.
本发明提供了一种纳米复合超早强型聚羧酸减水剂、制备方法及应用，制备方法包括以下步骤：步骤1、在反应容器中加入聚醚大单体、还原剂、功能单体、氧化剂、去离子水，于25~45℃下搅拌直至全部溶解，获得反应液A；步骤2、于25~45℃下，向搅拌状态下的反应液A中同时滴加丙烯酸溶液、维生素C水溶液，滴加完成后升温至45~65℃进行保温反应一段时间，用碱性化合物和/或碱性化合物的水溶液调整反应体系至碱性，获得反应液B；步骤3、于0~10℃下向反应液B中加入硝酸钙水溶液、硅酸钠水溶液，搅拌反应30~60min，获得成品。本发明的有益效果是：显著提升混凝土的早期强度，掺量低、减水率高、保坍性强，抗泥性能好，制备方法工艺简单、能耗低、生产周期短，易于工业化生产。
Nano-composite super-early-strength polycarboxylate superplasticizer as well as preparation method and application thereof
The invention provides a nano-composite super-early-strength polycarboxylate superplasticizer and a preparation method and application thereof.The preparation method comprises the following steps that 1, a polyether macromonomer, a reducing agent, a functional monomer, an oxidizing agent and deionized water are added into a reaction container and stirred at the temperature of 25-45 DEG C till all the components are dissolved, and a reaction solution A is obtained; step 2, simultaneously dropwise adding an acrylic acid solution and a vitamin C aqueous solution into the reaction solution A in a stirring state at 25-45 DEG C, heating to 45-65 DEG C after dropwise adding is completed, carrying out a heat preservation reaction for a period of time, and adjusting a reaction system to be alkaline by using an alkaline compound and/or an aqueous solution of the alkaline compound to obtain a reaction solution B; and step 3, adding a calcium nitrate aqueous solution and a sodium silicate aqueous solution into the reaction solution B at 0-10 DEG C, and stirring to react for 30-60 minutes to obtain a finished product. The concrete early strength improver has the beneficial effects that the early strength of concrete is remarkably improved, the mixing amount is low, the water-reducing rate is high, the slump loss resistance is strong, the mud resistance is good, the preparation method is simple in process, the energy consumption is low, the production period is short, and industrial production is easy.
本发明提供了一种纳米复合超早强型聚羧酸减水剂、制备方法及应用，制备方法包括以下步骤：步骤1、在反应容器中加入聚醚大单体、还原剂、功能单体、氧化剂、去离子水，于25~45℃下搅拌直至全部溶解，获得反应液A；步骤2、于25~45℃下，向搅拌状态下的反应液A中同时滴加丙烯酸溶液、维生素C水溶液，滴加完成后升温至45~65℃进行保温反应一段时间，用碱性化合物和/或碱性化合物的水溶液调整反应体系至碱性，获得反应液B；步骤3、于0~10℃下向反应液B中加入硝酸钙水溶液、硅酸钠水溶液，搅拌反应30~60min，获得成品。本发明的有益效果是：显著提升混凝土的早期强度，掺量低、减水率高、保坍性强，抗泥性能好，制备方法工艺简单、能耗低、生产周期短，易于工业化生产。
Nano-composite super-early-strength polycarboxylate superplasticizer as well as preparation method and application thereof
纳米复合超早强型聚羧酸减水剂、制备方法及其应用
WU YINGFU (author) / CUI YUANCHAO (author) / GAO FENG (author) / ZHU WEILIANG (author) / ZHU SHIRONG (author)
2024-12-27
Patent
Electronic Resource
Chinese
| European Patent Office | 2016
Super early strength polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2021
Super-early-strength polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2016
| European Patent Office | 2016
| European Patent Office | 2016