In a coastal environment, concrete faces the severe attack of chlorides (salts) and moisture, which are the "number one" enemies of reinforcement.
In areas close to the coast (even 1 km away), seawater droplets are carried by the air and settle on surfaces. The salts penetrate deep into the concrete and, once they reach the steel, cause rapid oxidation. This leads to cracks, delamination and serious static problems.
For maximum protection, we combine special concrete with increased reinforcement overlap and, where necessary, with epoxy paints or crystalline sealing additives.
Exhibition Categories:
- C25/30 XS1: It is applied to coastal structures that are exposed to salty air but not in direct contact or immersion in seawater. It is used in columns, walls and facades of buildings near the coast, as the XS1 category protects the reinforcement from chloride corrosion, ensuring longevity in the structure.
- C25/30 XS2: It is applied to marine projects that are permanently submerged in seawater, such as pier sections, underwater piers and saltwater tanks. The XS2 category (in combination with the C25/30 strength) ensures the low permeability of the concrete, which is necessary to prevent corrosion of the reinforcement by saltwater chlorides when the element is in permanent contact with it.
- C30/37 XS3: It is applied to marine structures within the tidal zone, such as docks, piers and bridge bases, where the concrete is repeatedly wetted by seawater and then dried. The high strength C30/37 and the special XS3 composition are necessary to resist chloride corrosion which is most intense precisely in this moisture-oxygen exchange zone.
- C30/37 XS1: It is applied exclusively to coastal structures that are exposed to salt air (airborne chlorides), but are not in direct contact with seawater. It is used in the load-bearing structure and facades of buildings that are up to a few hundred meters from the coast, as its dense composition prevents salt from corroding the steel reinforcement.
- C30/37 XS2: It is applied to marine projects that are permanently submerged or in constant contact with seawater, such as pier sections, underwater bridge piers and port facility walls. The C30/37 strength and XS2 category ensure the necessary low permeability of the concrete to prevent rapid corrosion of the reinforcement by saltwater chlorides.
- C30/37 XS3: It is applied to marine structures within the tidal zone, such as docks, piers and bridge bases, where the concrete is repeatedly wetted by seawater and then dried. The high strength C30/37 and the special XS3 composition are necessary to resist chloride corrosion which is most intense precisely in this moisture-oxygen exchange zone.
