Concrete anti-carbonation coatings: a review

Abstract

Protective coatings of the concrete surface against aggressive environments are constantly evolving. Given their diversity, the effectiveness of the latter becomes an important criterion for making the right among of a large commercialized variety, therefore, in recent years, several researchers have started research in this area and have proposed solutions to protect the surface exterior of concrete with coatings, such as organic, inorganic, mortars and paints against environmental aggressions. Among these aggressions, comes first the concrete carbonation, which is a natural phenomenon which compromises the durability of reinforced concrete structures by causing the corrosion of the reinforcements and consequently reduces the service life of these structures. This phenomenon cannot be avoided because CO₂ exists in the atmosphere, the penetration path of this harmful gas inside the concrete is the porosity of the cover concrete. This paper is a review of published works on the effectiveness of anti-carbonation coatings for the protection of reinforced concrete structures against concrete carbonation, and it also consists to presenting their classification according to the type and the selection criteria of these coatings and we end this work with conclusions and perspectives for the study of certain characteristics of these coatings, namely the durability and the adhesion to support.

Keywords:

• Review
• anti-carbonation coating
• organic coatings
• inorganic coatings
• concrete durability
• reinforcement corrosion

Disclosure statement

No potential conflict of interest was reported by the author(s).