无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
环境·健康·安全

球磨时间对磷石膏基胶凝材料性能影响研究

  • 许晴莹 ,
  • 杨鼎宜 ,
  • 吕伟 ,
  • 李想 ,
  • 钱云峰 ,
  • 杜保聪
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  • 1.扬州大学建筑科学与工程学院,江苏 扬州 225127
    2.扬州大学绿色建筑材料研究所
    3.湖北昌耀新材料股份有限公司
许晴莹(1997— ),女,硕士研究生,研究方向为工业废弃物的资源化利用;E-mail:1054249887@qq.com

收稿日期: 2021-11-10

  网络出版日期: 2022-05-31

基金资助

国家重点研发计划(2018YFD1101002)

Effect of grinding time on properties of phosphogypsum based cementitious materials

  • Qingying XU ,
  • Dingyi YANG ,
  • Wei Lü ,
  • Xiang LI ,
  • Yunfeng QIAN ,
  • Baocong DU
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  • 1.College of Civil Science and Engineering,Yangzhou University,Yangzhou 225127,China
    2.Research Institute of Green Building Materials,Yangzhou University
    3.Hubei Changyao New Material Stock Corporation

Received date: 2021-11-10

  Online published: 2022-05-31

摘要

以原状磷石膏为研究对象,在用热重分析与相组成分析技术探究磷石膏脱水温度与时间的基础上,研究了球磨时间对原状磷石膏粒径大小及分布、磷石膏硬化体以及磷石膏-水泥胶结料性能的影响。原状磷石膏脱水温度为130 ℃、脱水时间为60 min。在0~20 min,延长球磨时间可以有效降低磷石膏-水泥胶结料的流动度,缩短凝结时间,磷石膏硬化体以及磷石膏-水泥胶结料的力学强度先提高后降低。最优球磨时间为15 min,此时原状磷石膏粒径约为29 μm;所得的磷石膏-水泥胶结料具有较好的力学性能和耐水性能。

本文引用格式

许晴莹 , 杨鼎宜 , 吕伟 , 李想 , 钱云峰 , 杜保聪 . 球磨时间对磷石膏基胶凝材料性能影响研究[J]. 无机盐工业, 2022 , 54(5) : 101 -108 . DOI: 10.19964/j.issn.1006-4990.2021-0681

Abstract

Taking undisturbed phosphogypsum as the research object,on the basis of exploring the dehydration temperature and time of phosphogypsum by thermogravimetric analysis and phase composition analysis,the effect of grinding time on the size and distribution of intact phosphogypsum,hardened phosphogypsum and properties of phosphogypsum?cement binder was studied.The dehydration temperature was 130 ℃ and the dehydration time was 60 min of original phosphogypsum.In 0~20 min,the fluidity of phosphogypsum cement cements could be reduced effectively by prolonging the grinding time,and the setting time could be effectively shortened.The mechanical strength of phosphogypsum hardened body and phosphogypsum?cement increased firstly and then decreased.The optimal grinding time was 15 min,and the particle size of the original phosphogypsum was about 29 μm.The obtained phosphogypsum cement binder had better mechanical properties and its water resistance was improved.

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