Prediction of Thermally-Induced Reflective Cracking Using Full-Scale Test Data

Abstract

Reflective cracking is not addressed in the current Federal Aviation Administration (FAA) Advisory Circular for asphalt concrete (AC) overlaid rigid pavements. This paper presents the development of a reflective cracking model using full-scale test data. The prediction model reflected all three-stage process involving crack initiation, propagation, and final failure. Regression models were established to relate varies parameters including overlay temperature, cracking strain, crack propagation rate, number of loading cycles, and crack length. Based on the validation study results, it was shown that a reasonable prediction of the overlay fatigue life can be forecast. It was also demonstrated that lack of considering fracture healing effect during rest periods could result in substantial overestimate of the crack propagation rate and therefore premature overlay failure.