Durability of reinforced concrete structures can be considerably improved by appropriate surface technologies. Three different surface technologies are available at present, namely surface impregnation, sealing and coating. It is of utmost importance to make a clear distinction between these protective measures, as each one serves a distinct purpose. Water repellent surface impregnation of concrete is an efficient method to prevent chloride penetration into concrete. In this way service life of reinforced concrete structures in aggressive environment can be extended significantly. To achieve this goal it is mandatory to follow strict rules.
The main aim of the project was to formulate recommendations for water repellent treatment of reinforced concrete structures.
The following steps took place:
- Literature review and analysis of the existing European standards and recommendations
- Draft Recommendation
- Interviews to find oud opinions of practicing engineers
- Review by the company of a practice object
- Final formulation of recommendations
The aim was to summarize the progress made in recent years in the research of new knowledge for water repellent treatment of reinforced concrete structures in a user-friendly and practical recommendations. Recommendation for planning, application and quality control were compiled, which have been used on several occasions successfully, therefore the aim of the project was achieved.
S.J. Meier and F.H. Wittmann, Hydrophobieren von Betonoberflächen – Empfehlungenfür Planung und Applikation;Traitementhydrofuge de la surface des structures enbéton – Recommendations pour la planification et l’execution, Swiss Federal Office forRoads, ASTRA Report No. 591 (2005)