Highways Agency Reports

Research shows that specifications for bituminous road-making materials which rely solely on composition, do not guarantee that pavements all have the same performance. materials produced to comply with present recipe specifications can cover a range of mechanical properties and therefore, it might be more appropriate to specify the material by end product performance criteria rather than a recipe. A literature review was undertaken to assess test methods for hotrolled asphalt (HRA) wearing courses. Using this and other sources of information an evaluation of the available test methods was carried out. From this evaluation a research programme is proposed to evaluate the potential of tests for specifying end product requirements for HRA wearing courses.