The marine environment has proven very damaging to concrete structures, primarily due to corrosion of the reinforcing steel. This corrosion is an electro-chemical phenomenon from permeation of water, oxygen, and chlorides through the concrete. Substantial progress has been made towards rendering the concrete impermeable through inclusion in the mix of pozzolans and water-reducing admixtures. Adequate cover of such concrete over the reinforcement will then reduce the rate of permeation below critical levels. Other means include external coatings on the concrete surface and epoxy-coated reinforcement. Cathodic protection may be employed as a remedial measure. Recent successful experience in the North Sea, Arctic, tropics, and even the Mideast give confidence that long-term durability can be provided for concrete structures in the marine environment.
Design and construction of concrete ocean structures to ensure long-term durability
Auslegung und Konstruktion von meerestechnischen Betonbauten zur Sicherung langer Lebensdauer
1989
8 Seiten, 1 Quelle
Conference paper
English
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