Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Normal-temperature synthesized concrete polycarboxylate-type water reducer and preparation method thereof
The invention discloses a normal-temperature synthesized concrete polycarboxylate-type water reducer and a preparation method of the concrete polycarboxylate-type water reducer. The preparation methodcomprises the following steps: preparing the following raw materials: allyl polyoxyethylene ether APEG-2400, a chain transfer agent, an initiator, a reducing agent, acrylic acid, a lipid monomer, a neutralizer and deionized water; adding unsaturated polyoxyethylene ether, the chain transfer agent and the deionized water as substrates into a reaction kettle, performing stirring, and controlling the temperature to be 30 DEG C; and preparing an initiator solution, a reducing agent solution, an acrylic acid solution and a lipid monomer solution, and respectively dropwise adding the solutions intothe reaction kettle. The concrete polycarboxylate-type water reducing agent is synthesized through free radical polymerization of an aqueous solution, a composite oxidation-reduction system is adopted, an oxidizing agent and a reducing agent are separately dropwise added, the dropwise adding speed is reasonably controlled, implosion caused by local overheating is avoided, the reaction is stably carried out, and stable performance of a finished product material is ensured. The water reducing rate of the mortar reaches over 23% under the doping amount of 0.5%, the preparation process is simple,the production period is short, the safety coefficient is high, and industrial production is easy.
本发明公开了一种常温合成混凝土聚羧酸系减水剂及其制备方法。所述制备方法如下：原料准备：烯丙基聚氧乙烯醚APEG‑2400、链转移剂、引发剂、还原剂、丙烯酸、脂类单体、中和剂、去离子水；将不饱和聚氧乙烯醚、链转移剂和去离子水作为底物加入反应釜中并搅拌，控制温度为30℃；配制引发剂溶液、还原剂溶液、丙烯酸溶液和脂类单体溶液，并将其分别滴加到反应釜中。本发明通过水溶液自由基聚合合成了混凝土聚羧酸系减水剂，采用复合氧化还原体系，氧化剂与还原剂分开滴加，合理控制滴加速度，避免局部过热产生爆聚，使得反应稳定进行，确保成品物料性能稳定。在0.5％的掺量下胶砂减水率达到23％以上，制备工艺简单，生产周期短，安全系数高，易于工业化生产。
Normal-temperature synthesized concrete polycarboxylate-type water reducer and preparation method thereof
The invention discloses a normal-temperature synthesized concrete polycarboxylate-type water reducer and a preparation method of the concrete polycarboxylate-type water reducer. The preparation methodcomprises the following steps: preparing the following raw materials: allyl polyoxyethylene ether APEG-2400, a chain transfer agent, an initiator, a reducing agent, acrylic acid, a lipid monomer, a neutralizer and deionized water; adding unsaturated polyoxyethylene ether, the chain transfer agent and the deionized water as substrates into a reaction kettle, performing stirring, and controlling the temperature to be 30 DEG C; and preparing an initiator solution, a reducing agent solution, an acrylic acid solution and a lipid monomer solution, and respectively dropwise adding the solutions intothe reaction kettle. The concrete polycarboxylate-type water reducing agent is synthesized through free radical polymerization of an aqueous solution, a composite oxidation-reduction system is adopted, an oxidizing agent and a reducing agent are separately dropwise added, the dropwise adding speed is reasonably controlled, implosion caused by local overheating is avoided, the reaction is stably carried out, and stable performance of a finished product material is ensured. The water reducing rate of the mortar reaches over 23% under the doping amount of 0.5%, the preparation process is simple,the production period is short, the safety coefficient is high, and industrial production is easy.
本发明公开了一种常温合成混凝土聚羧酸系减水剂及其制备方法。所述制备方法如下：原料准备：烯丙基聚氧乙烯醚APEG‑2400、链转移剂、引发剂、还原剂、丙烯酸、脂类单体、中和剂、去离子水；将不饱和聚氧乙烯醚、链转移剂和去离子水作为底物加入反应釜中并搅拌，控制温度为30℃；配制引发剂溶液、还原剂溶液、丙烯酸溶液和脂类单体溶液，并将其分别滴加到反应釜中。本发明通过水溶液自由基聚合合成了混凝土聚羧酸系减水剂，采用复合氧化还原体系，氧化剂与还原剂分开滴加，合理控制滴加速度，避免局部过热产生爆聚，使得反应稳定进行，确保成品物料性能稳定。在0.5％的掺量下胶砂减水率达到23％以上，制备工艺简单，生产周期短，安全系数高，易于工业化生产。
Normal-temperature synthesized concrete polycarboxylate-type water reducer and preparation method thereof
一种常温合成混凝土聚羧酸系减水剂及其制备方法
LIU RONGJIN (Autor:in) / CHEN MEIHUA (Autor:in) / CHEN PING (Autor:in) / LIU ZHONGYUAN (Autor:in) / WU BIAO (Autor:in) / GAO TIANYU (Autor:in) / JING DAIYAN (Autor:in) / ZHANG JIANBING (Autor:in) / LU FUHUA (Autor:in) / ZHANG YALIN (Autor:in)
30.03.2021
Patent
Elektronische Ressource
Chinesisch
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