SERVICE - LIFE ESTIMATION FOR CONCRETE STRUCTURES IN MARINE ENVIRONMENT
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Published:2005
V H Nguyen, T A T Ngo, 2005. "SERVICE - LIFE ESTIMATION FOR CONCRETE STRUCTURES IN MARINE ENVIRONMENT", Admixtures - Enhancing Concrete Performance: Proceedings of the International Conference held at the University of Dundee, Scotland, UK on 6 July 2005, Ravindra K. Dhir, Peter C. Hewlett, Moray D. Newlands
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Concrete structures in marine environment are damaged mainly by the effecting of chloride ions. So far, to estimate the service-life of marine structures is based on the determination of chloride ion penetration into concrete. The Whiting or modified Whiting method based on total electric charge passed (coulombs) is rapid, but only qualitative. The chloride amount determined in drilled cores from specimens after testing can be used to calculate the diffusion coefficient, and then, using Fick's law to predict the service-life. It seems to be a quantitative. For an attempt to study the influence of different admixtures on the chloride ion penetration into concrete, and then the service-life of concrete, a research was produced with puzzolan and inhibitors admixtures. The results obtained by two methods are coincided, but with mineral (supplementary) admixtures as silicafume and/or fly ask, the chloride permeability can be used as measure to estimate the service-life of concrete, but do not with inhibitors.
INTRODUCTION
EXPERIMENTAL PROGRAMME
RESULTS AND DISCUSSIONS
CONCLUSIONS
REFERENCES
