ASPHALT SURFACE DETERIORATION PROPERTIES OF TEST PAVEMENT WITH CARBON BLACK ADDITIVE DURING SIX YEARS SURVICE

Abstract

 It has been pointed out that asphalt pavement deteriorates in very surface due to the weathering effects, especially for ultraviolet light attack, during long term servicing. As one of the countermeasures, carbon black additives technique has been studied to extend the service life by shielding ultraviolet light. In a test pavement on a newly constructed bypass road, carbon black was added to the asphalt mixture in order to verify the performance in a field, and the follow-up survey has been conducted up to six years in actual toad traffic servicing. As a result, it was found that asphalt deterioration is particularly remarkable in the part 10 mm from the pavement surface, and that the addition of carbon black can inhabit surface clack initiation corresponding to a period of several years by asphalt deterioration control against ultraviolet light.