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Title: The effect of Cr{sub 2}O{sub 3} and P{sub 2}O{sub 5} additions on the phase transformations during the formation of calcium sulfoaluminate C{sub 4}A{sub 3} S-bar

Abstract

The study describes the influence of chromium and phosphorus additions on the phase transformations during the formation of the calcium sulfoaluminate Ca{sub 4}Al{sub 6}SO{sub 16} from CaCO{sub 3}-Al{sub 2}O{sub 3}-CaSO{sub 4} mixtures. The temperatures of decarbonation reaction were measured by means of differential thermal analysis. The enthalpy variations at different heating temperatures were determined by isothermal calorimetry. The results show that the Cr{sub 2}O{sub 3} and P{sub 2}O{sub 5} additions lower the onset temperature of decarbonation. The energy requirement at high temperature of the doped mixtures is less, compared to that of mixtures without dopants. The formation of solid solutions is followed by X-ray diffraction. The higher concentrations of additives hinder the formation of the C{sub 4}A{sub 3} S-bar phase.

Authors:
 [1];  [2]
  1. Laboratoire TECSEN, UMR 6122, CNRS-FST de Saint Jerome, Case 251, Avenue Escadrille Normandie Niemen, 13397 Marseille Cedex 20 (France)
  2. Laboratoire TECSEN, UMR 6122, CNRS-FST de Saint Jerome, Case 251, Avenue Escadrille Normandie Niemen, 13397 Marseille Cedex 20 (France). E-mail: j.rogez@univ.u-3mrs.fr
Publication Date:
OSTI Identifier:
20793252
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 35; Journal Issue: 11; Other Information: DOI: 10.1016/j.cemconres.2005.06.005; PII: S0008-8846(05)00152-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; CALCIUM CARBONATES; CALCIUM SULFATES; CALORIMETRY; CHROMIUM OXIDES; DIFFERENTIAL THERMAL ANALYSIS; DOPED MATERIALS; ENTHALPY; PHASE TRANSFORMATIONS; PHOSPHORUS ADDITIONS; PHOSPHORUS OXIDES; SOLID SOLUTIONS; X-RAY DIFFRACTION

Citation Formats

Benarchid, My.Y., and Rogez, J. The effect of Cr{sub 2}O{sub 3} and P{sub 2}O{sub 5} additions on the phase transformations during the formation of calcium sulfoaluminate C{sub 4}A{sub 3} S-bar. United States: N. p., 2005. Web. doi:10.1016/J.CEMCONRES.2005.0.
Benarchid, My.Y., & Rogez, J. The effect of Cr{sub 2}O{sub 3} and P{sub 2}O{sub 5} additions on the phase transformations during the formation of calcium sulfoaluminate C{sub 4}A{sub 3} S-bar. United States. doi:10.1016/J.CEMCONRES.2005.0.
Benarchid, My.Y., and Rogez, J. Tue . "The effect of Cr{sub 2}O{sub 3} and P{sub 2}O{sub 5} additions on the phase transformations during the formation of calcium sulfoaluminate C{sub 4}A{sub 3} S-bar". United States. doi:10.1016/J.CEMCONRES.2005.0.
@article{osti_20793252,
title = {The effect of Cr{sub 2}O{sub 3} and P{sub 2}O{sub 5} additions on the phase transformations during the formation of calcium sulfoaluminate C{sub 4}A{sub 3} S-bar},
author = {Benarchid, My.Y. and Rogez, J.},
abstractNote = {The study describes the influence of chromium and phosphorus additions on the phase transformations during the formation of the calcium sulfoaluminate Ca{sub 4}Al{sub 6}SO{sub 16} from CaCO{sub 3}-Al{sub 2}O{sub 3}-CaSO{sub 4} mixtures. The temperatures of decarbonation reaction were measured by means of differential thermal analysis. The enthalpy variations at different heating temperatures were determined by isothermal calorimetry. The results show that the Cr{sub 2}O{sub 3} and P{sub 2}O{sub 5} additions lower the onset temperature of decarbonation. The energy requirement at high temperature of the doped mixtures is less, compared to that of mixtures without dopants. The formation of solid solutions is followed by X-ray diffraction. The higher concentrations of additives hinder the formation of the C{sub 4}A{sub 3} S-bar phase.},
doi = {10.1016/J.CEMCONRES.2005.0},
journal = {Cement and Concrete Research},
number = 11,
volume = 35,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2005},
month = {Tue Nov 15 00:00:00 EST 2005}
}