| Valorization of phosphogypsum as hydraulic binder. | |
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MedLine Citation:
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PMID: 18433998 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Phosphogypsum (calcium sulfate) is a naturally occurring part of the process of creating phosphoric acid (H(3)PO(4)), an essential component of many modern fertilizers. For every tonne of phosphoric acid made, from the reaction of phosphate rock with acid, commonly sulfuric acid, about 3t of phosphogypsum are created. There are three options for managing phosphogypsum: (i) disposal or dumping, (ii) stacking, (iii) use-in, for example, agriculture, construction, or landfill. This paper presents the valorization of two Tunisian phosphogypsums (referred as G and S) in calcium sulfoaluminate cement in the following proportions: 70% phosphogypsum-30% calcium sulfoaluminate clinker. The use of sample G leads to the production of a hydraulic binder which means that it is not destroyed when immersed in water. The binder including sample S performs very well when cured in air but is not resistant in water. Formation of massive ettringite in a rigid body leads to cracking and strength loss. |
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Authors:
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T Kuryatnyk; C Angulski da Luz; J Ambroise; J Pera |
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Publication Detail:
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Type: Journal Article Date: 2008-03-12 |
Journal Detail:
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Title: Journal of hazardous materials Volume: 160 ISSN: 0304-3894 ISO Abbreviation: J. Hazard. Mater. Publication Date: 2008 Dec |
Date Detail:
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Created Date: 2008-11-05 Completed Date: 2009-02-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9422688 Medline TA: J Hazard Mater Country: Netherlands |
Other Details:
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Languages: eng Pagination: 681-7 Citation Subset: IM |
Affiliation:
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Laboratoire Génie Civil et Ingéniérie Environnementale (LGCIE), Institut National des Sciences Appliquées de Lyon, Domaine Scientifique de la Doua, Bâtiment J. Tuset, 12, Avenue des Arts, 69 621 Villeurbanne Cedex, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Calcium Sulfate
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chemistry* Construction Materials / analysis*, economics* Hardness Microscopy, Electron, Scanning Particle Size Phosphorus / chemistry* Stress, Mechanical Tunisia X-Ray Diffraction |
| Chemical | |
Reg. No./Substance:
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13397-24-5/phosphogypsum; 7723-14-0/Phosphorus; 7778-18-9/Calcium Sulfate |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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