ABSTRACT
ABSTRACT. Concrete structures in the marine environment are subject to extreme exposure conditions and poor durability performance is commonplace. The durability of existing marine concrete structures can be assessed by measuring the state of deterioration particularly with regard to steel corrosion. This is done by determining the chloride content at the reinforcement, measuring the concrete resistivity and by potential mapping. These indicators are discussed and results of case studies of marine structures in South Africa are presented. Recommendations are made for a more rational system of ensuring durability which relies on appropriate performance specifications rather than the present prescriptive approach. The advantages of early assessment of potential durability using performance specifications and a strategy for implementation of the approach is suggested.
