Fatigue and deformation characteristics of large-aggregate mixes for bases.

Abstract

As part of a study conducted for Sabita on Heavy Duty Asphalt Pavements (HDAPs), the CSIR Division of Roads and Transport Technology developed a comprehensive and practical mix design method for large-aggregate mixes. In this paper, a framework for linking mix design parameters with the structural design process is discussed, based on dynamic tests conducted in the laboratory, complemented by Heavy Vehicle Simulator (HVS) tests on pavements containing Large-Aggregate Mixes for Bases (LAMBS). Initial results indicate that LAMBS are less sensitive than conventional mixes to the magnitude of horizontal tensile strain and that pavements containing LAMBS should be able to carry traffic in excess of 50 million E80s.