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A study of the carbonation profile of cement pastes by thermogravimetry and its effect on the compressive strength

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Abstract

In a previous work, the authors have carbonated totally high initial strength and sulfate-resistant Portland cement pastes. In order to solve the mechanical problems caused by the intense carbonation that occurred during those experiments, new carbonation conditions were applied in this study. The obtained products were analyzed with respect to the carbonation reactions by thermogravimetry and compressive mechanical strength. Comparative analysis with reference pastes obtained without carbonation at the same age shows that CO2 capture increases with carbonation time. However, there is an optimum time, up to which the carbonation treatment does not affect the mechanical properties of the paste. Below this time, the lower is the carbonation time the higher is the increase of compressive strength, when compared to that of the reference pastes processed at same operating conditions without carbonation.

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Acknowledgements

The authors acknowledge the experimental assistance of the Rio de Janeiro Federal University Chemical School Thermal Analysis and Civil Engineering Structure Laboratories and the financial support of the National Research Council (CNPq).

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Authors and Affiliations

  1. Civil Engineering Program, COPPE, Rio de Janeiro Federal University, Rio de Janeiro, Brazil

    Alex Neves Junior, Romildo Dias Toledo Filho & Eduardo de Moraes Rego Fairbairn

  2. Mato Grosso Federal University – UFMT, Campus of the Araguaia, Barra do Garças-MT, Brazil

    Alex Neves Junior

  3. School of Chemistry, Rio de Janeiro Federal University, Rio de Janeiro, Brazil

    Jo Dweck

Authors
  1. Alex Neves Junior
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  2. Romildo Dias Toledo Filho
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  3. Eduardo de Moraes Rego Fairbairn
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  4. Jo Dweck
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Correspondence to Alex Neves Junior.

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Neves Junior, A., Filho, R.D.T., Fairbairn, E.M.R. et al. A study of the carbonation profile of cement pastes by thermogravimetry and its effect on the compressive strength. J Therm Anal Calorim 116, 69–76 (2014). https://doi.org/10.1007/s10973-013-3556-7

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  • DOI: https://doi.org/10.1007/s10973-013-3556-7

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