Durability of water repellents in a marine environment
Schueremans, L.; Van Gemert, D.; Friedel, M.; Giessler-Blank, S. (2008). Durability of water repellents in a marine environment, in: DeClercq, H. et al. (Ed.) Hydrophobe V. 5th International Conference on Water Repellent Treatment of Building Materials. pp. 357-367
In: DeClercq, H.; Charola, A.E. (Ed.) (2008). Hydrophobe V. 5th International Conference on Water Repellent Treatment of Building Materials. Aedificatio Publishers: Freiburg. ISBN 978-3-931681-92-0. , more
The paper deals with the quay-wall of the new container terminal at Zeebrugge Harbor, Belgium, that has been protected against chloride ingress. For this purpose a water repellent agent based on isobutyltriethoxysilane was applied immediately after construction in 1993 and evaluated in a preliminary research program. To assess the effectiveness of the water repellent treatment in service, three subsequent on-site surveys were conducted in 1996, 1998, and 2005. The obtained data are used to feed the deterioration models related to chloride ingress into the structure and increased carbonation depth. As a result, the failure probability for the durability limit state function related to the preset service life is estimated. The latter is compared with general accepted target failure probabilities. Because of the relative extensive data sequence, the long-term effectiveness and thus durability of the treatment can be assessed in an objective way.
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