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Author(s):	Kusterle, Wolfgang; Pichler, Walter; Saxer, Andreas
Title:
Abstract:	Das sekundäre Entwässerungssystem von Verkehrstunneln kann durch Versinterungen stark beeinträchtigt werden. Die Zusammensetzung des Bergwassers und spezielle Umgebungsbedingungen sind dafür als Haupteinflussfaktoren anzusehen. Die Zusammensetzung zementgebundener Baustoffe kann jedoch ebenfalls dieses Versinterungspotenzial erhöhen. Ein einfaches Prüfverfahren kann helfen, dieses Potenzial abzuschätzen. Erste Erfahrungen mit diesem Verfahren zur Beurteilung von Spritzbeton, die beeinflussenden Parameter, dessen Genauigkeit und die Grenzen des Verfahrens werden vorgestellt. Reduced Leaching Behaviour of Sprayed Concrete The drainage system of traffic tunnels may be blocked by precipitations. Main influencing factors being the chemical composition of the water penetrating into the tunnel drainage system and the tunnel layout. Another influencing factor may be the composition of cementitious materials used. A simple, straight forward testing procedure is presented, which can be useful for detecting a potential leaching process. First experiences with this test method applied for sprayed concrete, its limits, precision and the influencing factors are presented.
Source:	Beton- und Stahlbetonbau 106 (2011), No. 12
Page/s:	847-852
Language of Publication:	German

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