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Application of the logarithmic procedure to absorption measurements of mass diffusivity for cement mortars

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Abstract.

This paper presents results of absorption measurements of mass diffusivity Dm, that were obtained through a logarithmic procedure concerning the advanced phase of the process. Calculations were referred to the large scale absorption experiment. The experiment covered three different types of the cement mortar with the water-cement ratio of w/c = 0.50, 0.65, 0.80, and was carried out at the temperature of T = 20, 35 and 50 °C. Five ranges of relative humidity Δϕ were studied at each temperature. Thus the absorption experiment covered 15 cycles ranging from 4 to 6 months. The experimental material made it possible to analyze structural, thermal and moisture conditions regarding mass diffusivity Dm. The experiment was furthermore a usability test for the logarithmic procedure as a tool for measurements of mass diffusivity.

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Acknowledgements.

The Measurements analyzed in this study are a part of the research project funded in the years 1998–2000 by KBN (State Committee for Scientific Research of Poland) as a grant No 7 T07E 011 14 [19]. This paper was sponsored by KBN in the frame of BW/RKH 2002–2003.

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  1. Department of Reinforced Concrete Structures and Concrete Technology, Technical University of Szczecin, Aleja Piastów 50, 70 – 311 Szczecin, Poland

    H. Garbalińska

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  1. H. Garbalińska
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Correspondence to H. Garbalińska.

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Garbalińska, H. Application of the logarithmic procedure to absorption measurements of mass diffusivity for cement mortars. Heat Mass Transfer 40, 963–972 (2004). https://doi.org/10.1007/s00231-003-0487-z

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  • DOI: https://doi.org/10.1007/s00231-003-0487-z

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