With the implementation of the asphalt package of European standards and the withdrawal of the equivalent British Standards in January 2008, the basis of the tests called in the Specification for Highway Works will have to change. This harmonisation of test methods for bitumen and asphalt will mean that the numerical values in requirements may need to be adjusted in order to maintain the same level of performance as prior to the change. Therefore, each test called up in the Specification for Highway Works has been reviewed alongside the harmonised European Standard that will replace it and the pair of standards have been categorised as being Identical, Related or Distinct. Comparative trials were undertaken on the tests for the determination of the texture depth of pavement surfaces, the storage stability of modified binders and the wheel-tracking properties of asphalt mixtures in order to determine what revision is needed to the numerical values of the limits imposed on those properties. (Author/publisher)
Samenvatting