The di- and tricalcium silicate dissolutions

Nonat, A.; Perrey, D.

doi:10.1016/J.CEMCONRES.2013.01.017

Title: The di- and tricalcium silicate dissolutions

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Abstract

In this study, a specially designed reactor connected to an ICP spectrometer enabled the careful determination of the dissolution rates of C{sub 3}S, C{sub 2}S and CaO, respectively, over a broad range of concentration of calcium and silicates under conditions devoid of C–S–H. The kinetic laws, bridging the dissolution rates and the undersaturations, were obtained after extrapolation of rate zero allowing the estimation of the true experimental solubility products of C{sub 3}S (K{sub sp} = 9.6 · 10{sup −23}), C{sub 2}S (K{sub sp} = 4.3 · 10{sup −18}) and CaO (K{sub sp} = 9.17 · 10{sup −6}). The latter are then compared to the solubilities calculated from the enthalpies of formation. We propose that the observed deviations result from the protonation of the unsaturated oxygen atoms present at the surface of these minerals. Hydration rates measured in cement pastes or in C{sub 3}S pastes are in excellent agreement with the kinetic law found in this study for C{sub 3}S under conditions undersaturated with respect to C–S–H.

Authors:

Nonat, A.; Perrey, D. ^[1]

Institut Carnot de Bourgogne UMR5209 CNRS, 9 avenue Alain Savary, BP 47870, 21078 Dijon Cedex (France)

Publication Date:: Wed May 15 00:00:00 EDT 2013

OSTI Identifier:: 22220795

Resource Type:: Journal Article

Journal Name:: Cement and Concrete Research

Additional Journal Information:: Journal Volume: 47; 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; CALCIUM; CALCIUM OXIDES; CALCIUM SILICATES; CEMENTS; DESIGN; DISSOLUTION; EXTRAPOLATION; FORMATION HEAT; HYDRATION; KINETICS; OXYGEN; SOLUBILITY; SURFACES

Citation Formats


                    Nicoleau, L., E-mail: luc.nicoleau@basf.com, Nonat, A., and Perrey, D. The di- and tricalcium silicate dissolutions.  United States: N. p., 2013. 
        Web.  doi:10.1016/J.CEMCONRES.2013.01.017.

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                    Nicoleau, L., E-mail: luc.nicoleau@basf.com, Nonat, A., & Perrey, D. The di- and tricalcium silicate dissolutions.  United States.  https://doi.org/10.1016/J.CEMCONRES.2013.01.017

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                    Nicoleau, L., E-mail: luc.nicoleau@basf.com, Nonat, A., and Perrey, D. 2013.  
        "The di- and tricalcium silicate dissolutions".  United States.  https://doi.org/10.1016/J.CEMCONRES.2013.01.017.

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@article{osti_22220795,

  title        = {The di- and tricalcium silicate dissolutions},

  author       = {Nicoleau, L., E-mail: luc.nicoleau@basf.com and Nonat, A. and Perrey, D.},

  abstractNote = {In this study, a specially designed reactor connected to an ICP spectrometer enabled the careful determination of the dissolution rates of C{sub 3}S, C{sub 2}S and CaO, respectively, over a broad range of concentration of calcium and silicates under conditions devoid of C–S–H. The kinetic laws, bridging the dissolution rates and the undersaturations, were obtained after extrapolation of rate zero allowing the estimation of the true experimental solubility products of C{sub 3}S (K{sub sp} = 9.6 · 10{sup −23}), C{sub 2}S (K{sub sp} = 4.3 · 10{sup −18}) and CaO (K{sub sp} = 9.17 · 10{sup −6}). The latter are then compared to the solubilities calculated from the enthalpies of formation. We propose that the observed deviations result from the protonation of the unsaturated oxygen atoms present at the surface of these minerals. Hydration rates measured in cement pastes or in C{sub 3}S pastes are in excellent agreement with the kinetic law found in this study for C{sub 3}S under conditions undersaturated with respect to C–S–H.},

  doi          = {10.1016/J.CEMCONRES.2013.01.017},

  url          = {https://www.osti.gov/biblio/22220795},
  journal      = {Cement and Concrete Research},

  issn         = {0008-8846},

  number       = ,

  volume       = 47,

  place        = {United States},

  year         = {Wed May 15 00:00:00 EDT 2013},

  month        = {Wed May 15 00:00:00 EDT 2013}

}

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