In charge of theme 1 (WG1)

Christian CLERGUE – SIGMA concrete (

Two types of durability tests exist:

  • sustainability indicators characterizing the properties of concrete in relation to resistance to external aggressions and for supplying aging models (example: chlorine ions diffusion coefficient towards the protection of reinforcement in the marine environment);
  • accelerated ageing tests (example: accelerated carbonation).

Degrado CementoDurability tests constitute the base of the performantial approach of concrete durability. The objective of the national project is to have, for each exposure class of the concrete defined in the standard NF EN206-1, one or more indicators related to tests that allow to compare and/or to assess the capacity of a concrete to withstand a given degradation. To be legitimate and operational, these tests must have a robust technical repository which makes consensus (procedures, data fidelity modes, effect of concrete age) and that could be applied to the vast majority of used concrete at present and in the future. They must also be measured at intervals consistent with the constraints of construction, with limited test durations (less than 3 months) and test methods simple enough to be accessible to a large number of laboratories and economically acceptable. Working proposals for durability tests are therefore in an overall objective to make operational deployment of the performantial approach throughout all the stages of life of a concrete (specification, formulation, production and construction, controls, and ageing monitoring). The principle is to rely on work in progress and coming, to make it possible to emerge consensus and deepen the critical points and the gaps; and this in close contact with standardization groups (GEF8 and GEDUB especially), the national working groups (the AFGC including sustainability indicators database) and European (CEN, RILEM for example) work.

This ambition is available in several common objectives thant concerns all the types of aggressions:

Objective 1 : Consolidate standard tests (or close to standard) to obtain a technical reference

Objective 2 : study some new protocoles to fill gaps, improve knwoledge and technical references

Objective 3 : Define a use frame of durability tests for evaluating durability of existing structures

Objective 4 : Improve use frame of durability tests to facilitate dissamination of the performantial approach