Study on Critical Fracture Criterion of Asphalt Mixture Based on the Semi-Circular Bending Test

摘要

Crack resistance is an important indicator to evaluate asphalt mixture performance, so the critical fracture criterion of asphalt mixture was deeply studied based on semi-circular bending test under different temperature. The results show that Semi-circle bending test is suitable to evaluate the crack resistance of asphalt mixture; fracture toughness Jc is a more reasonable indicator of the fracture criterion for asphalt mixture than Kc; The fracture toughness calculation model of single specimen built in this paper can simplify the semi-circular bending test operation, and can reduce the number of test specimens.