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Gravimetric, Volumetric And Calorimetric Studies of The Surface Structure of Portland Cement

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Abstract

Dry cement powder and hardened cement paste were characterised by means of laser granulometry and volumetric measurement of the nitrogen adsorption isotherm at 77 K. Water sorption isotherms at ambient temperature were measured stepwise by means of a gravimetric apparatus. The isotherms show a very large hysteresis loop, reaching down to zero relative pressure, which reflects swelling of the cement gel. Thermoporometric measurements reveal that swelling of that gel consists in water take up within the continuously growing structure; no stable pore structure could be observed.

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Authors and Affiliations

  1. Institut für Anorganische und Analytische Chemie, der Johannes Gutenberg-Universität, D-55099, Mainz, Germany

    E. Robens & K. K. Unger

  2. Mettler Toledo GmbH, Ockerweg 3, D-35379, Giessen, Germany

    B. Benzler

  3. POROTEC GmbH, Engelthaler Strasse 31, D-60435, Frankfurt am Main, Germany

    H. Reichert

Authors
  1. E. Robens
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  2. B. Benzler
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  3. H. Reichert
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  4. K. K. Unger
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Robens, E., Benzler, B., Reichert, H. et al. Gravimetric, Volumetric And Calorimetric Studies of The Surface Structure of Portland Cement. Journal of Thermal Analysis and Calorimetry 62, 435–441 (2000). https://doi.org/10.1023/A:1010194232213

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  • DOI: https://doi.org/10.1023/A:1010194232213

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