SELF-HEALING ASPHALT, FORMATION OF MICROCAPPSULAR AND ITS EFFECT ON PERFORMANCE

Abstract

Asphalt pavement roads are exposed to traffic and natural elements such as rain and oxidation, causing their relaxation ability to decrease and cracks to begin. In order to extend the life of the asphalt pavement service, measures should be taken to prevent excessive growth of cracks. One of the possible ways is to use innovative maintenance techniques, self-healing technology aimed at reversing the aging process in the asphalt binder. Self-healing microcapsules appear to be an effective way to autonomously repair microcracks, restore original mechanical properties, then slow the growth of fatigue cracks and increase the fatigue life of the flooring. In this study; After determining the properties of the microcapsules, different microcapsule ratios containing organic oils were added to the 50/70 penetration grade bitumen. Ductility self-healing tests (ASTM D113-07) were performed on bitumen samples containing 8-10% and 12% microcapsules to evaluate the self-healing capacity of asphalt mastics. Micro capsules containing rejuvenating will be a promising product to realize smart coatings. In other words, with the spread of microcracks, the crusts are split by the tip stress of the cracks, and rejuvenators have quickly filled the cracks under capillary action, indicating that the cracks have the potential to heal under this condition. Its self-healing ability partially repaired bitumen damage over its service life by comparing the properties of virgin and rejuvenated bitumen.