Linear and Nonlinear Viscoelastic Behaviour of Unmodified and Modified Binders and Asphalts
Professor G.D. Airey (NTEC) - Supervisor
Professor A.C. Collop (formerly NTEC) - Supervisor
Professor S.F. Brown (NTEC) - Supervisor
Behzad Rahimzadeh - Research Student
Background
Due to increased traffic loads, traffic volumes, tyre pressures and new complex axle configurations of trucks and aeroplanes, there has been an increased demand for more realistic and rational assessment of pavement material behaviour; particularly in terms of their dynamic stress-strain responses. The study of rheological properties of binders and asphalt mixtures provides a means of achieving this requirement.
Aims
The aim of this research is to undertake linear and non-linear rheological evaluation of modified and unmodified binders and asphalt mixtures. The binder testing consists of Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) evaluation of the linearity and rheological properties of a range of modified and unmodified binders. The asphalt mixture testing comprises uniaxial tension-compression testing of cylindrical asphalt mixture specimens.