ABSTRACT
The move towards performance based specifications for blacktop materials and the requirement for practitioners to have a greater fundamental understanding of bituminous mixtures, has generated an extensive amount of testing in U.K. laboratories in an effort to develop data banks for the generic types of material compositions used in the U.K. Such extensive testing has been facilitated by the availability and universal acceptance of the Nottingham Asphalt Test (NAT) Cooper and Brown (1989), which allows a fundamental assessment of mix samples to be carried out through a suite of easily executable tests.
