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贵州磷建筑石膏用缓凝剂的研究

作者：陈尚伟1，赵友缘2，葛庆梅2，丛航2

关键字：贵州,磷,建筑,石膏,用缓,凝剂,的,研究,贵州,

　
（1.贵州中建建筑科研设计院有限公司，贵州 贵阳  550025；
2.贵州大学 化学与化工学院化学系，贵州 贵阳  550025）
    摘要：研究了柠檬酸、三聚磷酸钠及骨胶蛋白质缓凝剂对贵州磷石膏凝结时间和强度的影响。结果表明，骨胶蛋白质缓凝剂相较于柠檬酸和三聚磷酸钠具有更好的缓凝效果。掺加骨胶蛋白质缓凝剂时，在对磷石膏强度影响相对较小的前提下能有效延长磷石膏的凝结时间，并且掺加骨胶蛋白质缓凝剂的磷石膏硬化体具有较好的微观晶体形貌，因此，优选骨胶蛋白质作为贵州磷石膏的缓凝剂。
    关键词：缓凝剂；贵州磷石膏；凝结时间；强度；晶体形貌
    中图分类号：TU528.042+.3        文献标识码：A        文章编号：1001-702X（2022）12-0114-04
 
Study on retarders for phosphogypsum building plaster in Guizhou
CHEN Shangwei1，ZHAO Youyuan2，GE Qingmei2，CONG Hang2
（1.Guizhou Architectural Science Research & Design Institute Limited Company of CSCEC，Guiyang 550025，China；
2.Department of Chemistry，School of Chemistry and Chemical Engineering，Guizhou University，Guiyang 550025，China）
    Abstract：In this paper，the effect of three kinds of retarders，including citric acid，sodium tripolyphosphate and bone glue protein，on the setting time and strength of Guizhou phosphogypsum was explored. The results showed that the bone glue protein retarder had better retarding effect than citric acid and sodium tripolyphosphate. When bone glue protein retarder is added，the setting time of phosphogypsum can be effectively prolonged under the premise of relatively small influence on the strength of phosphogypsum，and the sclerotic body of phosphogypsum mixed with bone glue protein retarder has good micro crystal morphology. Therefore，bone glue protein is preferred as the retarder for Guizhou phosphogypsum.
    Key words：retarder，Guizhou phosphogypsum，setting time，strength，crystal morphology