Natural fluorapatite as a raw material for Portland clinker. (March 2018)

• Record Type: Journal Article
• Authors: Boughanmi, Sonia; Labidi, Islem; Megriche, Adel; El Maaoui, Mohamed; Nonat, André
• Is Part Of: Cement and concrete research. Volume 105(2018)
• Page Start: 72
• Page End: 80
• Publication Date: 2018-03
• Subjects: Natural fluorapatite -- Clinker mineralogy -- Reactivity; Cement -- Periodicals; Cement -- Research -- Periodicals; Concrete -- Periodicals; Concrete -- Research -- Periodicals; Ciment -- Périodiques; Béton -- Périodiques; Cement; Concrete; Periodicals; 620.135
• DOI: 10.1016/j.cemconres.2018.01.006
• Languages: English
• ISSNs: 0008-8846

Abstract

Abstract: The present work focuses on the mineralogy and the reactivity of clinkers made from the integration of natural fluorapatite in the raw meals with percentages ranging from 0 up to15%. The samples were characterized by infrared spectrometry, X-ray diffraction and microscopy techniques. The distribution of phosphorous and fluorine into clinkers minerals was determined by MEB/EDS mapping. The mineralogical composition was determined by XRD/Rietveld and the samples reactivity followed by isothermal microcalorimetry. It has been found that fluorine stabilizes C3 S and β-C2 S which still are found with high levels of P2 O5 . Cements obtained from up to 8% natural fluorapatite incorporation still present acceptable properties. Natural fluorapatite could have an important potential as decarbonised source of CaO contributing to decrease the CO2 emission in cement industry.