Author(s)

D.M. Tan, E.K. Tschegg & S.E. Tschegg-Stanzl

Abstract

Fracture mechanical characterization of asphalt aggregate mixtures at different temperatures D.M. Tan," E.K. Tschegg,* S.E. Tschegg-Stanzl" " Institute of Met. and Physics, University of Agriculture, A-1190 Vienna, Austria * Institute of Applied and Technical Physics, Technical University Vienna, A-1040 Vienna, Austria ABSTRACT Three kinds of fracture mechanical concepts (linear elastic fracture mechanics, energy fracture resistance and strain-softening) to characterize asphalt aggregate mixtures at different temperatures are discussed in this paper. The results show that linear fracture mechanics is valid if asphalt fracturing takes place at -20°C. Fracture energy resistance and strain-softening models on the other hand can characterize the fracture properties of crack extension in the whole tested temperature range and therefore reveal appropriate parameters for computer aided assessment and control as well as for damage simulation. 1. INTRODUCTION Asphalt

Keywords