ABSTRACT
Previous research performed at the University of Minnesota (Zofka et al. 2005, Zofka et al. 2006, Zofka 2007 and Zofka et al. 2008) indicated that the Bending Beam Rheometer (BBR), currently used in the Performance Grading (PG) of asphalt binders, could be used to test thin asphalt mixture beams to obtain reliable measurements of creep compliance. There are significant advantages of using the BBR compared to the IDT:
• The BBR has a reasonable price and most agencies and laboratories already have it as part of the asphalt binder grading requirements.
