English

iv2splus INFONET
Verkehrsinfrastruktur, VIF2011
RAIL-SLEEPER
Verkehrsinfrastruktur
Neue Imprägnierungsmittel für die Bahnschwelle aus Holz
In this project products with a better toxicological profile than creosote are under
examination as alternatives for the impregnation of wooden railway sleepers. The
demanded key properties have to be geared to those shown by creosote: high
biological efficacy, long service-life, no increase of corrosion, low conductivity of
impregnated sleepers and high resistance against physical and chemical stress.
VIF2011
Project coordination
Holzforschung Austria - Forschungsinstitut
und akkreditierte Prüf- und
In the near future Biocide Products Directive (98/8/EC) will ban the use of creosote for
impregnation of wooden railway sleepers eventually. The aim of this project is the examination
of products with a better human- and ecotoxicological profile than creosote as alternatives for
this application. Thereby the demanded key properties have to be geared to those shown by
creosote: high biological efficacy, long service-life, no increase of corrosion of metal fixings,
low conductivity of impregnated sleepers and high resistance against physical and chemical
stress.
Überwachungsstelle der Österreichischen
Biological efficacy against all decay organism and required product concentration will be
determined in fungal experiments. Compatibility of the alternative products with metal fixings
and effects of alternative products on conductivity are investigated incorporating moisture
uptake of impregnated wood. Creosote is known to reduce moisture absorption of treated
wood, this behavior cannot be expected with the alternative products. Possibilities to achieve
this target with the modern, chromium free impregnation products are modifications of
amounts of formulation adjuvants or application of water-repellents. In this project both
approaches are attempted. Resistance against ultraviolet light, heat and low temperatures as
well as against oils and lubricants will be studied with special regard to water repellent effects.
Flammability and fire resistance of impregnated beech samples will be comparatively
investigated with untreated and creosote impregnated beech samples.
E-Mail: n.pfabigan@holzforschung.at
Gesellschaft für Holzforschung
Mag. Notburga Pfabigan
Tel.: +43-01-7982623-23
All data obtained are essentially necessary to estimate the potential of alternative
preservatives for impregnation of wooden railway sleepers.
Quelle: iV2plus Vernetzungsplattform der FFG (www.ffg.at/verkehr) und des Bundesministerium für Verkehr,
Innovation und Technologie (BMVIT), Abteilung Mobilitäts- und Verkehrstechnologien (Abt. III/I4)
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