The role of rejuvenators in embedded damage healing for asphalt pavement

Rejuvenator encapsulation technique showed great potential for extrinsic asphalt pavement damage healing. Once the capsules are embedded within pavement, healing is activated on-demand via progressing microcrack. When microcrack encounters capsule, fracture energy at tip opens capsule and releases rejuvenator. Then released rejuvenator wets crack surfaces, diffuses into softens aged bitumen, allowing two broken edges to come in contact, preventing further deterioration. The quality speed of repair process strongly depend on rejuvenator, thus it important choose a proper with good abilities restore lost properties bitumen from ageing show sustainable performance after To this aim, three different rejuvenators were studied ranked based their rejuvenated including physical properties, rheological chemical re-ageing. Furthermore, these encapsulated calcium alginate tests indicate diameter, mechanical resistance thermal stability influenced by findings will benefit development optimization system towards better effect pavement. • dosage used less than that RAP. type amount need be optimized system. Re-ageing test evaluation capable encapsulating rejuvenators. largely determines performance.