Mark Alexander | South Africa Durability Index Approach: Premises and development
Автор: fib International Federation Structural Concrete
Загружено: 2023-09-12
Просмотров: 295
The workshop aimed to better define distributions for the critical chloride content, Ccrit, and when they can be applied. Although Ccrit is only required for use in chloride ingress models, models themselves will not be discussed as it would broaden the topic too much.
One of the objectives of fib WG 8.9 “Deterioration processes” consists in developing further present models for calculating service life, but also to use other approaches not based in modelling. One of the approaches is the use of so-called “durability Indicators”, which is popular from the application of the test ASTM 1202 based on measuring the coulombs registered in a specimen submitted to an electric field. The durability Indicators based on results of the pass-not-pass-test have been taken by several countries and Administrations but without a homogenization of the meaning, the significance and the relation to the period of service life desired. In the present MC 2020, the Indicators have been incorporated as a second level of Approximation for evaluation of service life in spite of the different approaches behind the concept.
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