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Elaboration and thermal study of iron–phosphorus-substituted dicalcium silicate phase

Benarchid, My.Y. / Diouri, A. / Boukhari, A. / Aride, J. / Rogez, J. / Castanet, R.

AbstractIn the present work, we examine the simultaneous effect of iron and phosphorus additions on the calcium carbonate decomposition in CaCO3, SiO2, Fe2O3 and P2O5 mixtures at the molar ratio CaCO3/SiO2=2. The formation of the dicalcium silicate Ca2SiO4 is also studied. The temperatures of the decarbonation and the enthalpy evolution during the heating of the mixtures are measured. The additions of Fe2O3 and P2O5 oxides decrease the onset temperature of the CaCO3 decomposition. The energy consumption of decarbonation at about 835 °C is lowered when the dopant concentrations increase. Synthesized solid solutions are analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The free-lime quantity is determined by chemical analysis. The mineralogical analysis at room temperature of the products of the reaction shows the presence of iron–phosphorus-doped β, α′ and α-C2S modifications.

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Elaboration and thermal study of iron–phosphorus-substituted dicalcium silicate phase

Benarchid, My.Y. / Diouri, A. / Boukhari, A. / Aride, J. / Rogez, J. / Castanet, R.

AbstractIn the present work, we examine the simultaneous effect of iron and phosphorus additions on the calcium carbonate decomposition in CaCO3, SiO2, Fe2O3 and P2O5 mixtures at the molar ratio CaCO3/SiO2=2. The formation of the dicalcium silicate Ca2SiO4 is also studied. The temperatures of the decarbonation and the enthalpy evolution during the heating of the mixtures are measured. The additions of Fe2O3 and P2O5 oxides decrease the onset temperature of the CaCO3 decomposition. The energy consumption of decarbonation at about 835 °C is lowered when the dopant concentrations increase. Synthesized solid solutions are analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The free-lime quantity is determined by chemical analysis. The mineralogical analysis at room temperature of the products of the reaction shows the presence of iron–phosphorus-doped β, α′ and α-C2S modifications.

Elaboration and thermal study of iron–phosphorus-substituted dicalcium silicate phase

Benarchid, My.Y. / Diouri, A. / Boukhari, A. / Aride, J. / Rogez, J. / Castanet, R.

AbstractIn the present work, we examine the simultaneous effect of iron and phosphorus additions on the calcium carbonate decomposition in CaCO3, SiO2, Fe2O3 and P2O5 mixtures at the molar ratio CaCO3/SiO2=2. The formation of the dicalcium silicate Ca2SiO4 is also studied. The temperatures of the decarbonation and the enthalpy evolution during the heating of the mixtures are measured. The additions of Fe2O3 and P2O5 oxides decrease the onset temperature of the CaCO3 decomposition. The energy consumption of decarbonation at about 835 °C is lowered when the dopant concentrations increase. Synthesized solid solutions are analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The free-lime quantity is determined by chemical analysis. The mineralogical analysis at room temperature of the products of the reaction shows the presence of iron–phosphorus-doped β, α′ and α-C2S modifications.

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Title:

Elaboration and thermal study of iron–phosphorus-substituted dicalcium silicate phase

Contributors:

Benarchid, My.Y. (author) / Diouri, A. (author) / Boukhari, A. (author) / Aride, J. (author) / Rogez, J. (author) / Castanet, R. (author)

Published in:

Cement and Concrete Research ; 34 ; 1873-1879

Publication date:

2004-01-30

Size:

7 pages

ISSN:

DOI:

https://doi.org/10.1016/j.cemconres.2004.01.030

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Calorimetry , Thermal analysis , X-ray diffraction , Ca<inf>2</inf>SiO<inf>4</inf> , SEM

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