Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a polycarboxylate water reducer. The polycarboxylate water reducer is prepared by a method comprising the following steps: 1) mixing modified polyether, a special ester macro-monomer and water to obtain a first aqueous solution; 2) adding an oxidizing agent into the first aqueous solution, and dropwise adding a second aqueous solution and a third aqueous solution at the same time at the temperature of 20-70 DEG C; and 3) after the second aqueous solution and the third aqueous solution are completely added, stirring, controlling the temperature of the system to be 0-30 DEG C and not to be 0 DEG C, adding water, and adjusting the pH value of the system to be 6.5 +/-1.0 to obtain the polycarboxylate water reducer with the solid content of 40wt%-50wt%. The polycarboxylate water reducer has the advantages of low sensitivity to mixing amount, good slump loss resistance, good adaptability, especially good concrete workability, easy control of preparation conditions, simple operation, high application/cost performance, and realization of mass production.
本发明公开了一种聚羧酸减水剂。该聚羧酸减水剂由包括如下步骤的方法制备得到：1)将改性聚醚、特种酯类大单体、水混合，得到第一水溶液；2)向第一水溶液中加入氧化剂，在20℃‑70℃温度下，同时分别滴加第二水溶液、第三水溶液；3)第二水溶液和第三水溶液滴加完毕后，搅拌，控制体系温度为0℃‑30℃且不包括0℃，加水并调节体系pH值为6.5±1.0，得到固含量为40wt％‑50wt％的所述聚羧酸减水剂。本发明的聚羧酸减水剂对掺量敏感性低、保坍性好，适应性好，尤其混凝土和易性佳同时制备条件容易控制、操作简单、应用性价比高、可以实现量产。
The invention discloses a polycarboxylate water reducer. The polycarboxylate water reducer is prepared by a method comprising the following steps: 1) mixing modified polyether, a special ester macro-monomer and water to obtain a first aqueous solution; 2) adding an oxidizing agent into the first aqueous solution, and dropwise adding a second aqueous solution and a third aqueous solution at the same time at the temperature of 20-70 DEG C; and 3) after the second aqueous solution and the third aqueous solution are completely added, stirring, controlling the temperature of the system to be 0-30 DEG C and not to be 0 DEG C, adding water, and adjusting the pH value of the system to be 6.5 +/-1.0 to obtain the polycarboxylate water reducer with the solid content of 40wt%-50wt%. The polycarboxylate water reducer has the advantages of low sensitivity to mixing amount, good slump loss resistance, good adaptability, especially good concrete workability, easy control of preparation conditions, simple operation, high application/cost performance, and realization of mass production.
本发明公开了一种聚羧酸减水剂。该聚羧酸减水剂由包括如下步骤的方法制备得到：1)将改性聚醚、特种酯类大单体、水混合，得到第一水溶液；2)向第一水溶液中加入氧化剂，在20℃‑70℃温度下，同时分别滴加第二水溶液、第三水溶液；3)第二水溶液和第三水溶液滴加完毕后，搅拌，控制体系温度为0℃‑30℃且不包括0℃，加水并调节体系pH值为6.5±1.0，得到固含量为40wt％‑50wt％的所述聚羧酸减水剂。本发明的聚羧酸减水剂对掺量敏感性低、保坍性好，适应性好，尤其混凝土和易性佳同时制备条件容易控制、操作简单、应用性价比高、可以实现量产。
Polycarboxylate water reducer
一种聚羧酸减水剂
YANG XIAOFENG (Autor:in)
15.05.2020
Patent
Elektronische Ressource
Chinesisch
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