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新型无碱液体速凝剂的研制

作者:吴文贤

关键字:新型,无碱,液体,速凝剂,的,研制,科之,杰,

 
(科之杰新材料集团有限公司,福建 厦门  361101)
    摘要:为解决当前无碱速凝剂普遍存在的稳定性差、强度偏低、与水泥相容性问题突出等问题,采用丙烯酰铵(AM)、过硫酸铵(APS)、丙烯酸(AA)、巯基乙酸(TGA)和酒石酸氢钾(KHT)反应制得悬浮稳定剂(Point-XF);采用乙二胺四乙酸(EDTA)、三乙醇胺(TEOA)、对甲苯磺酸(PTSA)和苯二酚(HQ)反应制得络合增强剂(Point-ZQ);再通过正交试验确定Point-XF、Point-ZQ、硫酸铝[Al2(SO4)3]、羟甲基纤维素(HMC)和乙二酸的最佳用量,制得一种新型无碱液体速凝剂(Point-SN3)。试验结果表明,Point-SN3不仅能有效促进水泥水化,缩短凝结时间及提高早期强度,而且还具有较高的稳定性,对不同水泥具有良好的适应性。
    关键词:无碱速凝剂;合成;凝结时间;稳定性;适应性
    中图分类号:TU528.042        文献标识码:A        文章编号:1001-702X(2022)06-0124-05
 
Preparation of a novel alkali free liquid accelerator
WU Wenxian
(KZJ New Materials Group Co. Ltd.,Xiamen 361101,China)
    Abstract:In order to solve the problems of poor stability,low strength,prominent compatibility with cement and so on,a suspension stabilizer(Point-XF) was prepared by using ammonium acrylamide(AM),ammonium persulfate(APS),acrylic acid(AA),thioglycolic acid(TGA) and potassium hydrogen tartrate(KHT) under certain reaction conditions. Ethylenediamine tetraacetic acid (EDTA),triethanolamine(TEOA),p-toluenesulfonic acid(PTSA) and hydroquinone(HQ) were used to prepare a complexation enhancer (Point-ZQ) under certain reaction conditions. Then,Point-XF,Point-ZQ,aluminumsulfate[Al2(SO4)3],hydroxymethyl cellulose(HMC)and oxalic acid were used to prepare an alkali free liquid accelerator(Point-SN3) by the best process determined by orthogonal test. The test results show that Point-SN3 can not only effectively promote cement hydration,shorten setting time and improve early strength,but also has high stability and good adaptability with a variety of cements.
    Key words:alkali free liquid accelerator,synthesis,setting time,stability,adaptability