Simplified modelling of calcium leaching of concrete in various environments

Title: Simplified modelling of calcium leaching of concrete in various environments
Author(s): B. Gérard, C. Le Bellego, O. Bernard
Paper category : journal
Serial title: Concrete Science and Engineering
Abreviated Serial title: Concr. Sc. Eng.
ISSN: 1295-2826
Publisher: RILEM Publications SARL
Volume: 4
Issue: 16
Issue date: 2002-12-01
Publication year: 2002
Pages: 632 - 640
Total Pages: 9
Nb references: 18
Language: English

Abstract: Deterioration of concrete structures subjected to
aggressive water is often characterized by the leaching of
calcium from hydrates.Since calcium leaching is a non-
linear phenomenon,which is inf luenced by a wide range
of parameters,the residual service life of the structures
affected by such deterioration cannot be predicted satisfac-
torily on the basis of experimental results alone.In order
to provide more fundamental information on this phe-
nomenon,a numerical model was developed.The model
considers the thermodynamic equilibrium between the
pore solution and the various hydrated phases.In addi-
tion,the deterioration mechanism is treated from a
macroscopic point of view.This model has been first vali-
dated on cement paste samples leached by deionised
water.Second,extension to other kinds of environment
and materials was done by considering modification of the
chemical equilibrium between pore solution and solid
hydrates.

Online publication: 2002-10-30
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00