Abstract:
In meso-scale, bituminous mixture consists of bituminous mortar, aggregate and voids. The mechanical parameters of bituminous mortar are important parts of meso-scale properties of bituminous mixture and they have very significant effect on the tensile strength. To this end, a loading fixture is designed. Tensile tests for 9 groups of specimens at different loading rate and temperatures are carried out, and the whole tensile curve for bituminous is obtained. From the curve, the maximum tensile stress
σmax, the stiffness
Knn, and the displacement of failure process
U are determined. The parameters obtained are essential to simulate the cracking behavior of bituminous mixture using the cohesive constitutive model.