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A model for non-Fickian moisture transfer in wood



Title: A model for non-Fickian moisture transfer in wood
Author(s): K. Krabbenhoft, L. Damkilde
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 37
Issue: 273
Issue date: 2004-11-01
Publication year: 2004
Pages: 615 - 622
Total Pages: 8
Nb references: 22
Language: English


Abstract: The effect of elevated temperatures on basic hygric and thermal properties of three types of glass fiber reinforced cement composites (GFRC) is analyzed in the paper.
The main difference in the composition of particular GFRC is the use of wollastonite and vermiculite in two of them instead of usual sand aggregates.
The composites containing wollastonite and vermiculite are found to have about four times lower thermal conductivity and two to three times lower thermal diffusivity in room temperature conditions.
After heating the samples to 800°C and subsequent cooling, a decrease in room-temperature thermal conductivity as high as 50% and an increase in moisture diffusivity in the range of one to two orders of magnitude are observed for all types of studied materials.
The application of wollastonite and vermiculite exhibits a positive effect on the high temperature linear thermal expansion coefficient.
On the other hand, for temperatures higher than 450°C the thermal diffusivity of materials with wollastonite and vermiculite is higher than of common GFRC with sand aggregates.


Online publication: 2004-09-17
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/14036


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