Abstract
Abstract:
Durability and sustainability with respect to concrete structures are two important concepts that have to be defined critically to determine whether the former results in the latter.
While there is no agreement on the latter‟s definition, there is little disagreement that the concept is a desirable objective. This study focuses on the contribution of concrete durability through the development of the South African durability index (DI). The DI approach is based on the premise that the durability of RC structures is largely controlled by the quality and thickness of the cover layer protecting the reinforcement. The approach utilizes service life models that depend on the relevant indexes in their formulation to give performance-based specifications.
This integrated approach allows the use of marginal and new materials in concrete. In addition, the DI approach results in durable concrete structures that require minimal repair during their service life bringing about a savings in costs and material usage