Influence of the Saturation Degree of Concrete on Chloride Diffusion: Laboratory and Field Tests in Marine Structure 22-Year-Old

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Title: Influence of the Saturation Degree of Concrete on Chloride Diffusion: Laboratory and Field Tests in Marine Structure 22-Year-Old

Author(s): A.T.C. Guimaraes and P.R.L. Helene

Publication: Special Publication

Volume: 207

Issue:

Appears on pages(s): 169-192

Keywords: chloride; concrete; durability; marine environment; saturation degree

Date: 10/7/2002

Abstract:
The application of deterministic models based only on Fick's Laws can show considerable differences compared to the effective chloride profiles in existing marine structures. An important factor to be taken into consideration is the influence of the concrete saturation degree (SD). In the research, a laboratory test method for the influence of the SD on chloride diffusion in hardened cement paste was developed. Test results were applied to an existing marine structure with 22 years old. Results indicate that the concrete SD has a great influence on chloride diffusion and requires further research. It also shows that the SD should be taken into account when estimating the service life of concrete structures and a model is proposed.