Concrete with Reduced Environmental Impact Using Ternary Binders: Positioning Durability Performances Through a Performance-Based Approach

The ecological transition is one of the main challenges for construction actors who are committed to reducing the environmental footprint of structures. In this context, stakeholders in the concrete sector must have a range of tools and solutions to reduce CO2 emissions from concrete structures. The development of concretes with a lower carbon impact is one of the major solutions but requires an evolution of the standardization by allowing, for instance, a better contribution of mineral additions in binders to reduce carbon impact. This study focuses on the evaluation of the main mechanical and durability properties of around twenty concretes made from ternary binders to reduce the carbon impact of the material: compressive strength, porosity, electrical resistivity, accelerated carbonation, chlorides migration. The durability properties are compared on the one hand to concrete compatible with the current standard context, and on the other hand to the threshold values ​​used as part of a validation of the durability of concrete using a performance-based approach. The results highlight that these lower carbon impact solutions are compatible with durability requirements and support the need to evolve the traditional rules for specifying concrete to promote their use.