Oberflächenschutzsysteme für das Erstellen von hochbeständigen Betonkonstruktionen / Protective Coatings of Concrete Structures for High Durability

In practice concrete structures are often exposed to various environmental impacts which determine strongly durability of concrete and concrete structures. Costs of restoration of damaged concrete structures may be extremely high, in some cases higher than demolition and rebuilding. Not only real costs and financial investment for repair measures may be exorbitant, but limited use and negative impacts on the environment have to be taken into consideration too. In this paper a concept to reach sufficient durability is being developed in which technical, ecological and economical requirements are implied. For the realisation of this concept cement-based coatings with particular high resistance against chloride penetration and carbonation play a central role. It will be shown in this contribution that this type of coatings can protect the load bearing structure in an efficient way for a predetermined period. In this way long-term durability of concrete structures and reinforced elements exposed to aggressive environment can be achieved in both an economic and ecologic way.