Title:
Chloride Ingress in Concrete Structures: Extrapolation
of Observations
Author(s):
Per Goltermann
Publication:
Materials Journal
Volume:
100
Issue:
2
Appears on pages(s):
114-119
Keywords:
concrete; corrosion; deterioration
DOI:
10.14359/12550
Date:
3/1/2003
Abstract:
The concrete bridges in the infrastructure in the western world have reached an age where the costs of the maintenance activities have reached a level comparable to the cost of construction of new bridges. One of the main causes is chloride ingress and the resulting corrosion of reinforcement. The chloride concentration profiles are often determined from samples and used as a basis for assessment of the structure’s current conditions and for the prediction of future performance. The author has collected in a European research project a large number of chloride profiles from structures (own inspections and literature) and test panels (literature) to establish an empirical model for the extrapolation of observed chloride profiles and to determine the variation in presumed homogeneous areas of the structure. The predictions from the model are compared to actual values and the variations are explained through the observed variation of the input.