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254

Modeling of structural performances under coupled environmental and weather actions



Title: Modeling of structural performances under coupled environmental and weather actions
Author(s): K. Maekawa, T. Ishida
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 35
Issue: 254
Issue date: 2002-12-01
Publication year: 2002
Pages: 591 - 602
Total Pages: 12
Nb references: 26
Language: English


Abstract: Chloride penetration and moisture diffusion are two important transport processes for studying the long-term durability of concrete.
The chloride penetration and moisture transfer in concrete are considered as two coupled transport processes.
An experimental study was conducted for determining the related material parameters in the coupled transport processes.
For the coupled moisture diffusion,we consider that the total moisture flux J (t) H is resulted from two driving forces:the gradient of moisture H ,and the gradient of free chloride C(f) ,that is,J(t) H =D H-H grad (H )-D H-Cl grad (C (f),).
In this formulation,two transport parameters are involved:the moisture diffusion coefficient D H-H ,and the coupled moisture diffusion coefficient due to chloride diffusion D(H-Cl.
) .
A seepage test was designed specifically for determining the two transport parameters.
The test data showed that the chloride penetration accelerates the moisture diffusion significantly.
The two transport parameters were determined using the present test data.
The result showed that D(H-Cl) is not a constant,but depends linearly on the free chloride concentration.


Online publication: 2002-10-27
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13934


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