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现代化工  2021, Vol. 41 Issue (9): 101-106    DOI: 10.16606/j.cnki.issn0253-4320.2021.09.021
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
磷石膏复合胶凝材料的制备及胶结过程研究
魏兴1,2,3, 郑光亚1,2,3, 何宣志1,2,3, 张志远1,2,3, 张云开1,2,3, 夏举佩1,2,3
1. 昆明理工大学化学工程学院, 云南 昆明 650500;
2. 云南省磷化工节能与新材料重点实验室, 云南 昆明 650500;
3. 云南省高校磷化工重点实验室, 云南 昆明 650500
Preparation and cementation process of phosphogypsum composite cementing material
WEI Xing1,2,3, ZHENG Guang-ya1,2,3, HE Xuan-zhi1,2,3, ZHANG ZHi-yuan1,2,3, ZHANG Yun-kai1,2,3, XIA Ju-pei1,2,3
1. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China;
2. Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials, Kunming 650500, China;
3. The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming 650500, China
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摘要 为了促进磷石膏资源化利用,以磷石膏、无水石膏、钢渣和P·Ⅱ52.5水泥为原材料,通过复配方法制备磷石膏复合(PSGW)胶凝材料并对其水化胶结过程进行研究。结果表明,当磷石膏质量分数为35%、无水石膏质量分数为5%、钢渣质量分数为10%、P·Ⅱ52.5水泥质量分数为50%时,制备出的PSGW胶凝材料3 d抗折强度为4.9 MPa、抗压强度为35.3 MPa;28 d抗折强度为6.9 MPa、抗压强度为51.5 MPa、软化系数为0.88,满足P·O42.5 R等级要求。通过对PSGW胶凝材料进行XRD、FT-IR和SEM表征分析发现,该体系水化产物主要为棒状钙矾石、板块状水化硅酸钙、氢氧化钙和重结晶的二水硫酸钙。
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魏兴
郑光亚
何宣志
张志远
张云开
夏举佩
关键词:  磷石膏  胶凝材料  软化系数  水化机理    
Abstract: In order to promote the utilization of phosphogypsum,phosphogypsum composite cementing material (PGSM) is prepared through complex formulation method using phosphogypsum,anhydrous gypsum,steel slag and P·Ⅱ 52.5 cement as raw materials,and its hydration and cementitious process is studied.Experimental results show that PSGW cementing material is prepared reasonably when the contents of phosphogypsum,anhydrous gypsum,steel slag and P·Ⅱ 52.5 cement is 35%,5%,10% and 50%,respectively.The flexural strength and compressive strength of the material in 3 d is 4.87 MPa and 35.26 MPa,respectively,and the flexural strength and compressive strength in 28 d is 6.92 MPa and 51.51 MPa,respectively,and its softening coefficient is 0.88,which meet the requirement of P·O 42.5 R grade.Through the characterization of PSGW cementing materials by XRD,FT-IR and SEM,the hydration products of the system include mainly clonite ettringite,plate hydrated calcium silicate,calcium hydroxide and recrystallized calcium sulfate dihydrate.
Key words:  phosphogypsum    cementing material    softening coefficient    hydration mechanism
收稿日期:  2020-10-22      修回日期:  2021-07-09           出版日期:  2021-09-20
ZTFLH:  TH3  
基金资助: 国家自然科学基金项目(21566018)
通讯作者:  夏举佩(1966-),男,学士,教授,研究方向为固体废弃物共伴生资源利用,通讯联系人,xjp6661@163.com    E-mail:  xjp6661@163.com
作者简介:  魏兴(1993-),男,硕士研究生,研究方向为固体废弃物共伴生资源利用,1639306725@qq.com
引用本文:    
魏兴, 郑光亚, 何宣志, 张志远, 张云开, 夏举佩. 磷石膏复合胶凝材料的制备及胶结过程研究[J]. 现代化工, 2021, 41(9): 101-106.
WEI Xing, ZHENG Guang-ya, HE Xuan-zhi, ZHANG ZHi-yuan, ZHANG Yun-kai, XIA Ju-pei. Preparation and cementation process of phosphogypsum composite cementing material. Modern Chemical Industry, 2021, 41(9): 101-106.
链接本文:  
https://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2021.09.021  或          https://www.xdhg.com.cn/CN/Y2021/V41/I9/101
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