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Study of alkaline hydrothermal activation of belite cements by thermal analysis

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Abstract

The effect of alkaline hydrothermal activation of class-C fly ash belite cement was studied using thermal analysis (TG/DTG) by determining the increase in the combined water during a period of hydration of 180 days. The results were compared with those obtained for a belite cement hydrothermally activated in water. The two belite cements were fabricated via the hydrothermal-calcination route of class-C fly ash in 1 M NaOH solution (FABC-2-N) or demineralised water (FABC-2-W). From the results, the effect of the alkaline hydrothermal activation of belite cement (FABC-2-N) was clearly differentiated, mainly at early ages of hydration, for which the increase in the combined water was markedly higher than that of the belite cement that was hydrothermally activated in water. Important direct quantitative correlations were obtained among physicochemical parameters, such as the combined water, the BET surface area, the volume of nano-pores, and macro structural engineering properties such as the compressive mechanical strength.

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Acknowledgements

The authors gratefully acknowledge the financial support by the Minister of Science and Technology (Project nº MAT 2002-04023-CO3) and the Thermal Power Station of Cercs Catalonia, Spain for supplying the fly ash.

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Authors and Affiliations

  1. Institute of Construction Science “Eduardo Torroja” (CSIC), C/Serrano Galvache, 4, 28033, Madrid, Spain

    Sara Goñi & Ana Guerrero

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  1. Sara Goñi
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  2. Ana Guerrero
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Correspondence to Sara Goñi.

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Goñi, S., Guerrero, A. Study of alkaline hydrothermal activation of belite cements by thermal analysis. J Therm Anal Calorim 99, 471–477 (2010). https://doi.org/10.1007/s10973-009-0140-2

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  • DOI: https://doi.org/10.1007/s10973-009-0140-2

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