Using two-way ANOVA and hypothesis test in evaluating crumb rubber modification (CRM) agitation effects on rheological properties of bitumen

The effect of CRM aspects on rheological properties of asphalt binder such as improvement in the performance grade (PG) for low, intermediate, and high service temperatures are evaluated and the binder’s dynamic viscosity changes were studied in this research. Enhancement also resulted in the binder’s fatigue and rutting indices. At the same time, the effects of low/high shear blending conditions on the rheological properties were investigated. The effect of interactions between blending conditions and modifier content were studied by utilizing the analysis of variance (ANOVA) method and hypothesis tests.