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A platform for research: civil engineering, architecture and urbanism
Preparation method of anti-polyacrylamide water reducing agent
The invention belongs to the field of application of concrete admixtures, and discloses a preparation method of an anti-polyacrylamide water reducing agent, which comprises the following steps: step 1, preparing a cationic macromonomer, step 2, preparing a mixture A, step 3, preparing a mixture B, step 4, preparing a mixture C, and step 5, preparing the anti-polyacrylamide water reducing agent. 5, preparation of the anti-polyacrylamide water reducing agent, wherein the mixture B prepared in the step 3 and the mixture C prepared in the step 4 are dropwise added into the mixture A prepared in the step 2 for 1-3 h at the same time in nitrogen gas, and the anti-polyacrylamide water reducing agent is obtained. And 6, pouring the obtained reactant into a beaker, cooling to room temperature, and adjusting the pH value to 6-8 by using a NaOH aqueous solution. According to the anti-polyacrylamide water reducing agent provided by the invention, the anti-polyacrylamide water reducing agent is used in concrete, so that the problems that the fluidity of the concrete is reduced and the slump loss is too large after machine-made sand containing a flocculating agent is added into the concrete can be solved.
本发明属于混凝土外加剂应用领域，公开了一种抗聚丙烯酰胺减水剂的制备方法，包括步骤1：制备阳离子大单体，步骤2：混合物A的制备，步骤3：混合物B的制备，步骤4：混合物C的制备，步骤5：抗聚丙烯酰胺减水剂的制备：将步骤3制备的混合物B与步骤4制备的混合物C在氮气气体中同时滴加1‑3h到步骤2制备的混合物A中，得到抗聚丙烯酰胺减水剂；步骤6：将所得反应物倾倒至烧杯中冷却至室温，用NaOH水溶液调节至pH值为6‑8。本发明提供的抗聚丙烯酰胺减水剂，将该抗聚丙烯酰胺减水剂用于混凝土中，可以克服因在混凝土中加入含絮凝剂的机制砂后使混凝土流动性降低，坍落度损失过大的问题。
Preparation method of anti-polyacrylamide water reducing agent
The invention belongs to the field of application of concrete admixtures, and discloses a preparation method of an anti-polyacrylamide water reducing agent, which comprises the following steps: step 1, preparing a cationic macromonomer, step 2, preparing a mixture A, step 3, preparing a mixture B, step 4, preparing a mixture C, and step 5, preparing the anti-polyacrylamide water reducing agent. 5, preparation of the anti-polyacrylamide water reducing agent, wherein the mixture B prepared in the step 3 and the mixture C prepared in the step 4 are dropwise added into the mixture A prepared in the step 2 for 1-3 h at the same time in nitrogen gas, and the anti-polyacrylamide water reducing agent is obtained. And 6, pouring the obtained reactant into a beaker, cooling to room temperature, and adjusting the pH value to 6-8 by using a NaOH aqueous solution. According to the anti-polyacrylamide water reducing agent provided by the invention, the anti-polyacrylamide water reducing agent is used in concrete, so that the problems that the fluidity of the concrete is reduced and the slump loss is too large after machine-made sand containing a flocculating agent is added into the concrete can be solved.
本发明属于混凝土外加剂应用领域，公开了一种抗聚丙烯酰胺减水剂的制备方法，包括步骤1：制备阳离子大单体，步骤2：混合物A的制备，步骤3：混合物B的制备，步骤4：混合物C的制备，步骤5：抗聚丙烯酰胺减水剂的制备：将步骤3制备的混合物B与步骤4制备的混合物C在氮气气体中同时滴加1‑3h到步骤2制备的混合物A中，得到抗聚丙烯酰胺减水剂；步骤6：将所得反应物倾倒至烧杯中冷却至室温，用NaOH水溶液调节至pH值为6‑8。本发明提供的抗聚丙烯酰胺减水剂，将该抗聚丙烯酰胺减水剂用于混凝土中，可以克服因在混凝土中加入含絮凝剂的机制砂后使混凝土流动性降低，坍落度损失过大的问题。
Preparation method of anti-polyacrylamide water reducing agent
一种抗聚丙烯酰胺减水剂的制备方法
YU HAO (author) / JIAN KAI (author) / YANG WEIBEN (author) / HU KAIWEI (author) / YANG ZHEN (author)
2023-04-04
Patent
Electronic Resource
Chinese
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