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Title: In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction

Abstract

Eco-friendly belite calcium sulfoaluminate (BCSA) cement hydration behavior is not yet well understood. Here, we report an in-situ synchrotron X-ray powder diffraction study for the first hours of hydration of BCSA cements. Rietveld quantitative phase analysis has been used to establish the degree of reaction (α). The hydration of a mixture of ye'elimite and gypsum revealed that ettringite formation (α ∼ 70% at 50 h) is limited by ye'elimite dissolution. Two laboratory-prepared BCSA cements were also studied: non-active-BCSA and active-BCSA cements, with β- and α′{sub H}-belite as main phases, respectively. Ye'elimite, in the non-active-BCSA system, dissolves at higher pace (α ∼ 25% at 1 h) than in the active-BCSA one (α ∼ 10% at 1 h), with differences in the crystallization of ettringite (α ∼ 30% and α ∼ 5%, respectively). This behavior has strongly affected subsequent belite and ferrite reactivities, yielding stratlingite and other layered phases in non-active-BCSA. The dissolution and crystallization processes are reported and discussed in detail. -- Highlights: •Belite calcium sulfoaluminate cements early hydration mechanism has been determined. •Belite hydration strongly depends on availability of aluminum hydroxide. •Orthorhombic ye’elimite dissolved at a higher pace than cubic one. •Ye’elimite larger reaction degree yields stratlingite formation by belitemore » reaction. •Rietveld method quantified gypsum, anhydrite and bassanite dissolution rates.« less

Authors:
; ; ; ;  [1];  [2];  [3];  [1];  [4];  [1]
  1. Departamento de Química Inorgánica, Universidad de Málaga, Campus Teatinos S/N., 29071 Málaga (Spain)
  2. Unidad Técnica de Investigación de Materiales, AIDICO, Avda. Benjamín Franklin, 17 Paterna, Valencia (Spain)
  3. CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona (Spain)
  4. (Spain)
Publication Date:
OSTI Identifier:
22220836
Resource Type:
Journal Article
Journal Name:
Cement and Concrete Research
Additional Journal Information:
Journal Volume: 56; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0008-8846
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANHYDRITE; CALCIUM; CEMENTS; CRYSTALLIZATION; DISSOLUTION; FERRITE; FERRITES; GYPSUM; HYDRATION; SYNCHROTRONS; X-RAY DIFFRACTION

Citation Formats

Álvarez-Pinazo, G., Cuesta, A., García-Maté, M., Santacruz, I., Losilla, E.R., Sanfélix, S.G., Fauth, F., Aranda, M.A.G., CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona, and De la Torre, A.G., E-mail: mgd@uma.es. In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction. United States: N. p., 2014. Web. doi:10.1016/J.CEMCONRES.2013.10.009.
Álvarez-Pinazo, G., Cuesta, A., García-Maté, M., Santacruz, I., Losilla, E.R., Sanfélix, S.G., Fauth, F., Aranda, M.A.G., CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona, & De la Torre, A.G., E-mail: mgd@uma.es. In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction. United States. doi:10.1016/J.CEMCONRES.2013.10.009.
Álvarez-Pinazo, G., Cuesta, A., García-Maté, M., Santacruz, I., Losilla, E.R., Sanfélix, S.G., Fauth, F., Aranda, M.A.G., CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona, and De la Torre, A.G., E-mail: mgd@uma.es. Sat . "In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction". United States. doi:10.1016/J.CEMCONRES.2013.10.009.
@article{osti_22220836,
title = {In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction},
author = {Álvarez-Pinazo, G. and Cuesta, A. and García-Maté, M. and Santacruz, I. and Losilla, E.R. and Sanfélix, S.G. and Fauth, F. and Aranda, M.A.G. and CELLS-Alba synchrotron, Carretera BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona and De la Torre, A.G., E-mail: mgd@uma.es},
abstractNote = {Eco-friendly belite calcium sulfoaluminate (BCSA) cement hydration behavior is not yet well understood. Here, we report an in-situ synchrotron X-ray powder diffraction study for the first hours of hydration of BCSA cements. Rietveld quantitative phase analysis has been used to establish the degree of reaction (α). The hydration of a mixture of ye'elimite and gypsum revealed that ettringite formation (α ∼ 70% at 50 h) is limited by ye'elimite dissolution. Two laboratory-prepared BCSA cements were also studied: non-active-BCSA and active-BCSA cements, with β- and α′{sub H}-belite as main phases, respectively. Ye'elimite, in the non-active-BCSA system, dissolves at higher pace (α ∼ 25% at 1 h) than in the active-BCSA one (α ∼ 10% at 1 h), with differences in the crystallization of ettringite (α ∼ 30% and α ∼ 5%, respectively). This behavior has strongly affected subsequent belite and ferrite reactivities, yielding stratlingite and other layered phases in non-active-BCSA. The dissolution and crystallization processes are reported and discussed in detail. -- Highlights: •Belite calcium sulfoaluminate cements early hydration mechanism has been determined. •Belite hydration strongly depends on availability of aluminum hydroxide. •Orthorhombic ye’elimite dissolved at a higher pace than cubic one. •Ye’elimite larger reaction degree yields stratlingite formation by belite reaction. •Rietveld method quantified gypsum, anhydrite and bassanite dissolution rates.},
doi = {10.1016/J.CEMCONRES.2013.10.009},
journal = {Cement and Concrete Research},
issn = {0008-8846},
number = ,
volume = 56,
place = {United States},
year = {2014},
month = {2}
}