Study on physical and chemical characteristics of β-hemihydrate phosphogypsum
Source abstract
Abstract
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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Rock Mechanics and Modeling · Tailings Management and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Phosphogypsum recycling: a review of environmental issues, current trends, and prospects10.3390/app11041575 ↗
2. Hydrogen-enriched syngas production by lignite chemical looping gasification with composite oxygen carriers of phosphogypsum and steel slag10.1016/j.energy.2021.122927 ↗
3. Effect of neutralization on the setting and hardening characters of hemihydrate phosphogypsum plaster10.1016/j.conbuildmat.2018.09.095 ↗
4. Phosphogypsum as a construction material10.1016/j.jclepro.2017.08.049 ↗
5. Influence of phosphorus from phosphogypsum on the initial hydration of portland cement in the presence of superplasticizers10.1016/j.cemconcomp.2017.07.029 ↗
6. A novel dynamic business model to quantify the effects of policy intervention on solid waste recycling industry: A case study on phosphogypsum recycling in Yichang, China10.1016/j.jclepro.2022.131779 ↗
7. Chemical treatment of phosphogypsum and its potential application for building and construction, 2nd international conference on sustainable materials processing and manufacturing10.1016/j.promfg.2019.06.007 ↗
8. Investigation on the hydration of hemeihydrate phosphogypsum after post treatment10.1016/j.conbuildmat.2019.116864 ↗
9. Reuse of phosphogypsum as hemihydrate gypsum: the negative effect and content control of H3PO410.1016/j.resconrec.2021.105830 ↗
10. Determination of utilization strategies for hemihydrate phosphogypsum in cemented paste backfill: used as cementitious material or aggregate10.1016/j.jenvman.2022.114687 ↗
11. Low cost and high efficiency utilization of hemihydrate phosphogypsum: used as binder to prepare filling material10.1016/j.conbuildmat.2018.02.022 ↗
12. Effect of varying water content and extreme weather conditions on the mechanical performance of sludge bricks solidified/stabilized by hemihydrate phosphogypsum, slag, and cement10.1016/j.conbuildmat.2021.125286 ↗
13. Preparation of eco-friendly lightweight gypsum: use of beta-hemihydrate phosphogypsum and expanded polystyrene particles10.1016/j.conbuildmat.2021.123837 ↗
14. Study on the improvement of the waterproof and mechanical properties of hemihydrate phosphogypsum-based foam insulation materials10.1016/j.conbuildmat.2019.117014 ↗
15. Effect of phosphatic and fluoride impurities of phosphogypsum on the properties of selenite plaster10.1016/S0008-8846(03)00068-1 ↗
16. Microstructural analyses of phosphogypsum generated by Brazilian fertilizer industries10.1016/j.matchar.2007.02.001 ↗
17. Hydration reaction and microstructural characteristics of hemihydrate phosphogypsum with variable pH10.1016/j.conbuildmat.2021.125891 ↗
18. Gregg · 1982
19. Dehydration pathways of gypsum and the rehydration mechanism of soluble anhydrite γ-CaSO410.1021/acsomega.8b03476 ↗
20. Li · 2012
21. Scrivener · 2016
22. Calcium sulphate hemihydrate hydration leading to gypsum crystallization10.1016/j.pcrysgrow.2007.01.002 ↗
23. Effect of eutectic phosphorus on properties of gypsum and its mechanism
24. Effect of phosphonate additive on crystallization of gypsum in phosphoric and sulfuric acid medium10.1002/crat.200290001 ↗
25. Hydration characteristics and mechanism analysis of b-calcium sulfate hemihydrate10.1016/j.conbuildmat.2021.123714 ↗
26. Hydration reactions and microstructural characteristics of hemihydrate with citric and malic acid10.1016/j.conbuildmat.2008.07.022 ↗
27. The effect of different cation on the hydration and indurations process of a-hemihydrates gypsum based on double-layer theory
28. Mullin · 2001
29. GB/T 28627-2012, Gypsum plaster. Beijing: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, 2012.
30. Effect of citric acid on setting inhibition and mechanical properties of gypsum building plasters10.1016/j.conbuildmat.2011.06.072 ↗