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A platform for research: civil engineering, architecture and urbanism
Preparation method of early-strength polycarboxylate superplasticizer for prefabricated member
The invention discloses a preparation method of an early-strength polycarboxylic acid water reducing agent for a prefabricated member, and belongs to the field of water reducing agent preparation.The preparation method of the early-strength polycarboxylic acid water reducing agent comprises the steps that acrylic acid, mercaptopropionic acid and soft water are mixed to form a material A, and a reducing agent and water are mixed to form a material B. The preparation method of the water reducing agent comprises the steps that a thermometer and a speed regulating stirrer are installed; the preparation method comprises the following steps: adding soft water, methyl allyl polyethenoxy ether 2400, an oxidizing agent and an auxiliary reducing agent into a four-neck flask of a reflux condensing tube and a dropwise adding device, stirring and heating to 25 DEG C, dropwise adding the material A and the material B at the same time, uniformly dropwise adding the material A for 3 hours, uniformly dropwise adding the material B for 3.5 hours, after dropwise adding the material B, curing for 1.5 hours, and then adding a 30% sodium hydroxide aqueous solution and water to obtain the polycarboxylate superplasticizer. The early-strength polycarboxylate superplasticizer for the prefabricated member is reliable in quality, and when the polycarboxylate superplasticizer is used, fresh concrete is good in workability, the concrete setting time is short, and the early strength is high.
本发明公开了一种预制件用早强聚羧酸减水剂的制备方法，属于减水剂的制备领域，本发明减水剂的制备方法为：丙烯酸、巯基丙酸、软水混合为A料，还原剂、水混合为B料，所述的减水剂的制备方法为：在装有温度计、调速搅拌器，回流冷凝管及滴加装置的四口烧瓶中，加入软水、甲基烯丙基聚氧乙烯醚2400、氧化剂、助还原剂，然后搅拌加热至25℃，然后同时滴加A料、B料，A料均匀3小时滴完，B料均匀3.5小时滴完，B料滴完后，熟化1.5小时，然后加入30％的氢氧化钠水溶液，以及水，即得聚羧酸减水剂。本发明的预制件用早强聚羧酸减水剂的品质可靠，且该聚羧酸减水剂使用时：新拌混凝土和易性好，混凝土凝结时间短、早期强度高。
Preparation method of early-strength polycarboxylate superplasticizer for prefabricated member
The invention discloses a preparation method of an early-strength polycarboxylic acid water reducing agent for a prefabricated member, and belongs to the field of water reducing agent preparation.The preparation method of the early-strength polycarboxylic acid water reducing agent comprises the steps that acrylic acid, mercaptopropionic acid and soft water are mixed to form a material A, and a reducing agent and water are mixed to form a material B. The preparation method of the water reducing agent comprises the steps that a thermometer and a speed regulating stirrer are installed; the preparation method comprises the following steps: adding soft water, methyl allyl polyethenoxy ether 2400, an oxidizing agent and an auxiliary reducing agent into a four-neck flask of a reflux condensing tube and a dropwise adding device, stirring and heating to 25 DEG C, dropwise adding the material A and the material B at the same time, uniformly dropwise adding the material A for 3 hours, uniformly dropwise adding the material B for 3.5 hours, after dropwise adding the material B, curing for 1.5 hours, and then adding a 30% sodium hydroxide aqueous solution and water to obtain the polycarboxylate superplasticizer. The early-strength polycarboxylate superplasticizer for the prefabricated member is reliable in quality, and when the polycarboxylate superplasticizer is used, fresh concrete is good in workability, the concrete setting time is short, and the early strength is high.
本发明公开了一种预制件用早强聚羧酸减水剂的制备方法，属于减水剂的制备领域，本发明减水剂的制备方法为：丙烯酸、巯基丙酸、软水混合为A料，还原剂、水混合为B料，所述的减水剂的制备方法为：在装有温度计、调速搅拌器，回流冷凝管及滴加装置的四口烧瓶中，加入软水、甲基烯丙基聚氧乙烯醚2400、氧化剂、助还原剂，然后搅拌加热至25℃，然后同时滴加A料、B料，A料均匀3小时滴完，B料均匀3.5小时滴完，B料滴完后，熟化1.5小时，然后加入30％的氢氧化钠水溶液，以及水，即得聚羧酸减水剂。本发明的预制件用早强聚羧酸减水剂的品质可靠，且该聚羧酸减水剂使用时：新拌混凝土和易性好，混凝土凝结时间短、早期强度高。
Preparation method of early-strength polycarboxylate superplasticizer for prefabricated member
一种预制件用早强聚羧酸减水剂的制备方法
LIU BIN (author) / QUE YUANYANG (author) / YE ANCHENG (author) / ZHANG JUN (author)
2022-06-28
Patent
Electronic Resource
Chinese
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