Study on physical and chemical characteristics of β-hemihydrate phosphogypsum
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 o...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522005939 |
| _version_ | 1818049486831747072 |
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| author | Xuemei Chen Yuanzheng Liu Qihong Wu Yi Ding Qingyuan Wang Wenjie Tang Baiyu Zhu |
| author_facet | Xuemei Chen Yuanzheng Liu Qihong Wu Yi Ding Qingyuan Wang Wenjie Tang Baiyu Zhu |
| author_sort | Xuemei Chen |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-10T10:38:21Z |
| format | Article |
| id | doaj.art-46a798be4e894a34b5f50fe639eddff5 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-12-10T10:38:21Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-46a798be4e894a34b5f50fe639eddff52022-12-22T01:52:23ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01461Study on physical and chemical characteristics of β-hemihydrate phosphogypsumXuemei Chen0Yuanzheng Liu1Qihong Wu2Yi Ding3Qingyuan Wang4Wenjie Tang5Baiyu Zhu6College 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, ChinaSichuan Huayizhongchuang New Materials Co., LTD, Chengdu 610300, ChinaCollege 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.Anhui Province Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefui 230601, ChinaCollege 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, ChinaCollege of Architechture and Civil Engineering, Chengdu University, Chengdu 610106, ChinaCollege of Architechture and Civil Engineering, Chengdu University, Chengdu 610106, ChinaCalcium 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.http://www.sciencedirect.com/science/article/pii/S2214509522005939Hemihydrate phosphogypsumMicrostructureCompatibilityHydration |
| spellingShingle | Xuemei Chen Yuanzheng Liu Qihong Wu Yi Ding Qingyuan Wang Wenjie Tang Baiyu Zhu Study on physical and chemical characteristics of β-hemihydrate phosphogypsum Case Studies in Construction Materials Hemihydrate phosphogypsum Microstructure Compatibility Hydration |
| title | Study on physical and chemical characteristics of β-hemihydrate phosphogypsum |
| title_full | Study on physical and chemical characteristics of β-hemihydrate phosphogypsum |
| title_fullStr | Study on physical and chemical characteristics of β-hemihydrate phosphogypsum |
| title_full_unstemmed | Study on physical and chemical characteristics of β-hemihydrate phosphogypsum |
| title_short | Study on physical and chemical characteristics of β-hemihydrate phosphogypsum |
| title_sort | study on physical and chemical characteristics of β hemihydrate phosphogypsum |
| topic | Hemihydrate phosphogypsum Microstructure Compatibility Hydration |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522005939 |
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