Self-Healing Technology of Asphalt Pavements

Abstract

 Cap heal reduces the environmental  pollution and improves the performance of asphalt  pavement. Since large amount of budget is allocated to road  construction, so there is a need to implement more  economically and environmentally sustainable practices.  However rheological properties of the pavement after using  rejuvenator were determined by penetration, softening point,  viscosity and ductility. Cap heal as a rejuvenating agent is  used to restore aged asphalt of different aging degree and the  effect of cap heal on the reclaimed properties is investigated.  The results indicate that cap heal can make the properties of  aged asphalt restore its strength properties and make it  durable, anticreeping and self healing. The main aim of using  this cap heal is to make it economical and feasible by saving  the maintenance cost. The mixing amount of cap heal  increases with the aging degree. For the asphalt sample  which aged for 5h, 2% of mixing amount can make the  penetration, softening point, ductility of aged asphalt  restores. For the asphalt sample which aged for 7.5h and 10h,  4% of mixing amount can make the penetration, softening  point, ductility of aged asphalt restores. Compared with  original asphalt, the construction temperature of regenerating  asphalt increases slightly. Adhesion ability between  aggregate and asphalt is affected by cap heal and anti stripping materials are expected to be used.