Paper number 1281

INTERFACE PROPERTIES BETWEEN A STEEL PRE-STRESSING STRAND AND AN EPOXY MATRIX.

J. Van Vooren¹, B. Van Vooren², D. Van Hemelrijck¹

1Free University of Brussel, Dept. of Mechanics of Materials and Constructions,
Pleinlaan 2, 1050 Brussels, Belgium.
2Dywidag-Systems International nv
Industrieweg 25 - B3190 Boortmeerbeek

Summary

The mechanical properties of the interface between a steel pre-stressing strand and an epoxy matrix as used in a combined wedge-bond anchorage were studied. This type of anchorage transfers the loads between the bridge deck and the pylons. As for the fiber-matrix interface in composite materials the pull-out test was used to characterise the interface behaviour. The influence of the bondlength on important characteristics as for instance initial debonding and the pull-out force was investigated.

Keywords

interface, pre-stressing strand, pull-out test, gradual debonding.