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铝酸盐型低碱液体速凝剂的合成工艺及性能研究

作者:万甜明,舒豆豆,罗率,杨志飞,赵元松

关键字:铝,酸盐型,低碱,液体,速凝剂,的,合成,工艺,及,

 
(1.常青藤科技发展有限公司,四川 成都  610065;2.四川同舟化工科技有限公司,四川 绵阳  621000)
摘要:以氢氧化钠、氢氧化钾和氢氧化铝为基础组分,通过添加改性剂合成了一种铝酸盐型低碱液体速凝剂。研究了合成工艺参数对速凝剂性能的影响,试验结果表明,最佳配比和工艺条件为:碱铝摩尔比为1.4,水玻璃、三乙醇胺、聚丙烯酰胺用量分别为速凝剂质量的2.0%、2.0%、0.2%,反应时间1.5 h,反应温度110 ℃。所制得的低碱速凝剂采用不同水泥进行测试,掺量为6%时,水泥初凝时间均小于3 min、终凝均小于8 min,同时该速凝剂1 d抗压强度均大于10 MPa,28 d抗压强度比均大于100%,符合JC 477—2005规定的一等品要求。
关键词:铝酸盐;低碱液体速凝剂;凝结时间;抗压强度;适应性  
中图分类号:TU528.042        文献标识码:A        文章编号:1001-702X(2019)06-0127-04
 
Study on synthesis process and properties of aluminate type of low alkali liquid accelerator 
WAN Tianming,SHU Doudou,LUO Shuai,YANG Zhifei,ZHAO Yuansong
(1.IVY Science & Technology Development Co. Ltd.,Chengdu 610065,China;
2.Sichuan Tongzhou Chemical Technology Co. Ltd.,Mianyang 621000,China)
Abstract:An aluminate low alkali liquid accelerator was synthesized from sodium hydroxide,potassium hydroxide and aluminum hydroxide as basic components by adding modifier. The effects of various synthetic process parameters on the performance of the accelerator were studied. The experimental results showed that the optimum ratio and process conditions were as follows:The molar ratio of alkali aluminum was 1.4,the amount of water glass,alcohol amine,polyacrylamide was 2%,2%,and 0.2% respectively,the reaction time was 1.5 h,and the reaction temperature was 110 ℃. The prepared alkali free liquid accelerator was tested by different cements. When the dosage was 6%,the cement setting time were less than 3 min,the final setting were less than 8 min,at the same time,the 1 d compressive strength of accelerating agent were greater than 10 MPa,28 d compressive strength were greater than 100%,which can reach the requirements of the first-class products in JC 477—2005.
Key words:aluminate,low alkali liquid accelerator,setting time,compressive strength,adaptability