Study on physical and chemical characteristics of β-hemihydrate phosphogypsum

被引：25

作者：

Chen, Xuemei ^{[1
,2
]}

Liu, Yuanzheng ^{[3
]}

Wu, Qihong ^{[1
,2
]}

Ding, Yi ^{[4
]}

Wang, Qingyuan ^{[1
,2
]}

Tang, Wenjie ^{[1
]}

Zhu, Baiyu ^{[1
]}

机构：

[1] Chengdu Univ, Coll Architechture & Civil Engn, Chengdu 610106, Peoples R China

[2] Chengdu Univ, Sichuan Prov Engn Res Ctr City Solid Waste Energy, Chengdu 610106, Peoples R China

[3] Sichuan Huayizhongchuang New Mat Co LTD, Chengdu 610300, Peoples R China

[4] Anhui Jianzhu Univ, Anhui Prov Key Lab Adv Bldg Mat, Hefui 230601, Peoples R China

来源：

CASE STUDIES IN CONSTRUCTION MATERIALS | 2022年 / 17卷

关键词：

Hemihydrate phosphogypsum; Microstructure; Compatibility; Hydration; GYPSUM; HYDRATION; ACID;

D O I：

10.1016/j.cscm.2022.e01461

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Calcium sulfate hemihydrate is the most widely used binder for gypsum-based materials. This paper investigates the physical and chemical characteristics of beta-hemihydrate phosphogypsum aiming to promote the utilization of phosphogypsum on a large scale. A comparative study of HPG, HFG and HNG based on particle characteristics, composition analysis, hydration charac-teristics, microstructure, and compatibility with admixtures was performed. The results show that the acidic hydration environment and co-crystallized phosphate are particular for HPG. The optimal admixtures for HPG are protein retarder and polycarboxylate superplasticizer. Besides, an increase in HPG particle fineness would promote hydration and improve mechanical strength in the presence of a water reducer. The comparable strength and the same hydration mechanism support that HPG is a competitive binder with HFG and HNG. These findings are desirable for industrial application.

引用

页数：16

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