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保水型聚羧酸减水剂的合成及性能研究

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摘要 文章通过优化引发剂过硫酸铵的使用量(4%),合成了具有维持混凝土良好流动性的甲基烯丙基聚氧乙烯醚-甲基丙烯酸-丙烯酰胺三元共聚羧酸型减水剂。然后为提高其保水性能,在反应过程中添加适量的乙烯基三甲基硅烷,与不使用减水剂的混凝土及未添加乙烯基三甲基硅烷的减水剂相比,这种减水剂具有维持混凝土坍落度、提高和易性、显著提高保水性的特点,其2h泌水率仅为2.1。对于混凝土和易性和强度的提高具有显著的作用。
出处 《河南建材》 2019年第4期93-93,95,共2页 Henan Building Materials
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