Hot mix asphalt fracture mechanics: A fundamental crack growth law for asphalt mixtures
Additional Document Info
Recent laboratory and field studies at the University of Florida have led to the development of a viscoelastic fracture mechanics-based crack growth law for asphalt mixtures that is capable of fully describing both initiation and propagation of cracks in asphalt mixtures for any combination of loading and temperature conditions. The model requires the determination of only four fundamental mixture parameters that can be obtained from less than one hour of testing using the SuperPave Indirect Tension Test (IDT). These parameters can account for micro-damage, crack propagation, and healing for stated loading conditions, temperatures, and rest periods. This paper summarizes the developments leading to the model, and describes the model and its potential use in the areas of mixture design and optimization, performance-based specifications, and pavement design.