A compact analytical material model for unconfined concrete under uni-axial compression

Title: A compact analytical material model for unconfined concrete under uni-axial compression
Author(s): P. Kumar
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: 585 - 590
Total Pages: 6
Nb references: 12
Language: English

Abstract: Chloride induced corrosion is one of the main deterioration mechanisms in reinforced concrete.
The assessment of the structures conditions often includes a determination of the chloride ingress, based on a few samples from the assumed critical positions, e.
g.
near the bottom of columns exposed to de-icing salt.
Later sampling in nearly the same positions lead, however, often to quite different assessments of the chloride ingress and different service life predictions.
The paper determines the variations of the basic parameters (chloride content, moisture content and paste content), the estimated parameters (chloride surface concentrations and coefficient of diffusion) and of the estimated service life in the presumed homogeneous areas.
The variations of the parameters are large (10 to 40 %) when the parameters are based on profiles from cores and increase when they are based on profiles from powder samples.
A compensation for the paste content was carried out, but did not reduce the variations.
These basic variations prevent reliable deterministic assessment and predictions and are probably caused by variations of the concrete in the presumed homogeneous areas.
Reliable predictions will therefore require larger number of samples or use of a probabilistic assessment of the chloride ingress and the service life.

Online publication: 2004-09-17
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13974