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Durability of hydrophobie treatments on concrete - results from laboratory tests
For many year hydrophobic agents have been used to reduce water ingress into buildings and structures. Since the applications of traditional materials in early civilizations the chemical composition of water repellent materials has been optimized. However, an estimation of their durability is not yet possible, especially in the field of hydrophobic surface treatments for concrete . The main objective aim of this work was the evaluation of possible deterioration mechanisms that might lead to a loss of effectiveness of water repellent treatments and hence their durability. In order to investigate a spectrum of commercially available products, six different hydrophobic agents with different organic residues as well as different solvent types were investigated. These were applied to two different types of concrete. The specimens were aged artificially by accelerated carbonation, exposure to UV-light and high-alkaline environment. After artificial ageing different performance parameters were measured, such as contact angle, water absorption and impregnation depth. Furthermore, some samples were analyzed with the new NMR-Mouse technology. The results show possible ways to separate different degradation mechanisms and their influences on the performance of hydrophobic treatments. The NMR-Mouse technology reveals to be a promising possibility of measuring the impregnation depth of hydrophobic treatments non-destructively.
Durability of hydrophobie treatments on concrete - results from laboratory tests
For many year hydrophobic agents have been used to reduce water ingress into buildings and structures. Since the applications of traditional materials in early civilizations the chemical composition of water repellent materials has been optimized. However, an estimation of their durability is not yet possible, especially in the field of hydrophobic surface treatments for concrete . The main objective aim of this work was the evaluation of possible deterioration mechanisms that might lead to a loss of effectiveness of water repellent treatments and hence their durability. In order to investigate a spectrum of commercially available products, six different hydrophobic agents with different organic residues as well as different solvent types were investigated. These were applied to two different types of concrete. The specimens were aged artificially by accelerated carbonation, exposure to UV-light and high-alkaline environment. After artificial ageing different performance parameters were measured, such as contact angle, water absorption and impregnation depth. Furthermore, some samples were analyzed with the new NMR-Mouse technology. The results show possible ways to separate different degradation mechanisms and their influences on the performance of hydrophobic treatments. The NMR-Mouse technology reveals to be a promising possibility of measuring the impregnation depth of hydrophobic treatments non-destructively.
Durability of hydrophobie treatments on concrete - results from laboratory tests
Die Haltbarkeit von Hydrophobierbehandlungen auf Beton - Ergebnisse von Laborversuchen
Büttner, T. (author) / Raupach, M. (author)
2008
12 Seiten, 6 Bilder, 3 Tabellen, 5 Quellen
Conference paper
English
Haltbarkeit , Oberflächenbehandlung , Hydrophobierbehandlung , wasserabstoßendes Mittel , Beton , Laborversuch , experimentelles Ergebnis , Schädigungsmechanismus , Produktvergleich , künstliche Alterung , Ultraviolettbestrahlung , Aufkohlung , alkalisches Medium , Eindringtiefe , Kernresonanzspektrometrie
Hydrophobie schützt. Verschmutzungsverhalten von Fassadenfarben
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