Measurement of Diffusion Coefficients in Building Materials Using the Initial Rate of Sorption

João M.P.Q. Delgado

doi:10.4028/www.scientific.net/DDF.258-260.85

Paper Titles

On the Role of Diffusion in the Oxidation of Fe, Ni, Co and the Fe-Sn Alloy by Calcium and Sodium Sulfates
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Use of Sγ Momentums for the Modeling of Tracer Transport in Homogeneous Porous Media
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Interdiffusion Between Ni-Based Superalloy and MCrAlY Coating
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Diffusion and Stress in Tungsten; Different Time Scales
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Measurement of Diffusion Coefficients in Building Materials Using the Initial Rate of Sorption
p.85

The Role of Reducibility in Achievement of the Minimal Coke Consumption in the Blast Furnace Smelting
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Mathematical Model of Sintering of Powder Solids
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Interphase Diffusion with Curved Phase Boundaries
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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 258-260Measurement of Diffusion Coefficients in Building...

Measurement of Diffusion Coefficients in Building Materials Using the Initial Rate of Sorption

Abstract:

This work presents experimental values of molecular diffusion coefficient, obtained with samples of building materials, using a non-stationary process of moisture absorption. The experiments covered four different types of building materials (with two selected ranges of relative humidity) and were carried out in the range of temperatures between 20°C and 40°C. The results show that the increase in temperature resulted in an increase in molecular diffusion coefficient and the relative humidity also influenced the molecular diffusion in a uniform manner. Finally, a good agreement with literature values was found.

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Periodical:

Defect and Diffusion Forum (Volumes 258-260)

Pages:

85-90

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.258-260.85

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Online since:

October 2006

Authors:

João M.P.Q. Delgado

Keywords:

Building Material, Diffusion Coefficient, Relative Humidity (RH), Sorption, Temperature

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