Natural fluorapatite as a raw material for Portland clinker

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 distributio...

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Bibliographic Details
Published in:Cement and concrete research 2018-03, Vol.105, p.72-80
Main Authors: Boughanmi, Sonia, Labidi, Islem, Megriche, Adel, El Maaoui, Mohamed, Nonat, André
Format: Article
Language:English
Subjects:
APATITES
CALCIUM OXIDES
CALORIMETRY
CARBON DIOXIDE
CEMENT INDUSTRY
Clinker
Clinker mineralogy
Dicalcium silicate
Diffraction
Fluorapatite
FLUORINE
Mapping
MATERIALS SCIENCE
Meals
MICROSCOPY
MINERALOGY
Natural fluorapatite
PHOSPHORUS OXIDES
Phosphorus pentoxide
PORTLAND CEMENT
RAW MATERIALS
REACTIVITY
SPECTROSCOPY
Tricalcium silicate
X-RAY DIFFRACTION
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Summary: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 C3S and β-C2S which still are found with high levels of P2O5. 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.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2018.01.006