Drying of porous building materials: hydraulic diffusivity and front propagation

Title: Drying of porous building materials: hydraulic diffusivity and front propagation
Author(s): D. A. Lockington, J.-Y. Parlange, D. A. Barry, C. Leech
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 36
Issue: 261
Issue date: 2003-08-01
Publication year: 2003
Pages: 448 - 452
Total Pages: 5
Nb references: 9
Language: English

Abstract: One-dimensional drying of a porous building material is modelled as a nonlinear diffusion process.
The most difficult case of strong surface drying when an internal drying front is created is treated in particular.
Simple analytical formulae for the drying front and moisture profiles during second stage drying are obtained when the hydraulic diffusivity is known.
The analysis demonstrates the origin of the constant drying front speed observed elsewhere experimentally.
Application of the formulae is illustrated for an exponential diffusivity and applied to the drying of a fired clay brick.

Online publication: 2003-06-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13791