Dependence of Rheological Performance on Rubber Particle Size and Quantity

Description

Dependence of Rheological Performance on Rubber Particle Size and Quantity

Anita Blasl, Juliane Kraft, Frohmut Wellner

 ABSTRACT: Currently, many efforts are undertaken to reach asphalt performance from binder performance in order to reduce costly and time consuming laboratory tests on asphalt materials. In this context, it is important to perform and develop appropriate testing methods for a comprehensive binder characterization, which requires suitable material models. Depending on the application, different models can be used to model rheological bitumen behavior. This paper focuses on the applicability of the Olard-Di Benedetto (2S2P1D) model for bitumen samples containing different amounts of rubber particles of various sizes. One purpose is to analyze the influence of the rubber components on the parameters of the investigated model. Therefore, Dynamic Shear Rheometer tests were conducted on binder samples produced in laboratory by mixing a paving bitumen (50/70) with different rubber components. Both the amount of rubber and the particle size were varied. Additionally, a paving bitumen (50/70) and a polymer modified bitumen (PmB 25/55-55) were also involved as reference bitumen. The resulting influences of the used rubber particles are illustrated through master curves, black diagrams and cole-cole plots under others by fitting the experimental data by the application of the 2S2P1D model.

KEYWORDS: Recycling, Bitumen, Tire Rubber, Rubber Modification, Dynamic Shear Rheometer (DSR), Rheology, 2S2P1D.