Study on physical and chemical characteristics of β-hemihydrate phosphogypsum

Xuemei Chen; Yuanzheng Liu; Qihong Wu; Yi Ding; Qingyuan Wang; Wenjie Tang; Baiyu Zhu

Case Studies in Construction Materials (Dec 2022)

Study on physical and chemical characteristics of β-hemihydrate phosphogypsum

Xuemei Chen,
Yuanzheng Liu,
Qihong Wu,
Yi Ding,
Qingyuan Wang,
Wenjie Tang,
Baiyu Zhu

Affiliations

Xuemei Chen: College of Architechture and Civil Engineering, Chengdu University, Chengdu 610106, China; Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion and Utilization Technology, Chengdu University, Chengdu 610106, China
Yuanzheng Liu: Sichuan Huayizhongchuang New Materials Co., LTD, Chengdu 610300, China
Qihong Wu: College of Architechture and Civil Engineering, Chengdu University, Chengdu 610106, China; Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion and Utilization Technology, Chengdu University, Chengdu 610106, China; Corresponding author at: College of Architechture and Civil Engineering, Chengdu University, Chengdu 610106, China.
Yi Ding: Anhui Province Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefui 230601, China
Qingyuan Wang: College of Architechture and Civil Engineering, Chengdu University, Chengdu 610106, China; Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Building Materials Conversion and Utilization Technology, Chengdu University, Chengdu 610106, China
Wenjie Tang: College of Architechture and Civil Engineering, Chengdu University, Chengdu 610106, China
Baiyu Zhu: College of Architechture and Civil Engineering, Chengdu University, Chengdu 610106, China

Journal volume & issue: Vol. 17
p. e01461

Abstract

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Calcium sulfate hemihydrate is the most widely used binder for gypsum-based materials. This paper investigates the physical and chemical characteristics of β-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 characteristics, 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.

Published in Case Studies in Construction Materials

ISSN: 2214-5095 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/case-studies-in-construction-materials

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