The purpose of this report is to present a state of the art on research directed to understanding the phenomenon of aging of asphalt-aggregate mixtures. Short-term and long-term effects will be considered. Also included is a review of test methods that have been used to assess the effects of aging. Recommendations will be made for aging procedures and test methods which show promise for laboratory investigation. Following preliminary tests, more detailed testing will be done, which will ultimately lead to development of standard proceduresfor aging mixtures. Such procedures may be incorporated in a mix design or mix analysis system so that the effects of aging on the fundamental - properties of asphalt mixtures can be assessed.

2 ex. Identisk med: SHRP-A-305