Evaluation of Susceptibility of Asphalt Binders to Rutting through MSCR Test

Using modified asphalt binder is one of the most effective methods to solve the rutting problem of asphalt pavement, but the
traditional G∗/sin δ parameter is not enough to characterize the rutting resistance of modified asphalt in field use. In order to
accurately evaluate the high temperature performance of asphalt and establish the relationship between the rutting resistance of
binder and mixture, two kinds of matrix asphalt and three kinds of modified asphalt were selected for DSR and MSCR tests.
G∗/sin δ, nonrecoverable creep compliance Jnr, recovery rate R, and other parameters were used to characterize the permanent
deformation resistance of the binder, and the correlation between these parameters and the results of rutting test was analyzed.
'e results show that Jnr3.2 can accurately characterize the permanent deformation resistance of asphalt, while the stress sensitivity
index Jnrdiff is not applicable to all types of modified asphalt. In contrast, Jnrslope can better reflect the stress sensitivity of asphalt,
and Jnrslope is significantly correlated with the results of rutting test.