Lifecycle costs of in-situ rejuvenation and warm-mix porous asphalt technologies

Abstract

This study evaluated the lifecycle costs associated with in-situ rejuvenation and the use of warm-mix porous asphalt mixtures (WM-ZOAB) and compared them with traditional resurfacing maintenance. The results indicated that the economic impacts of in-situ rejuvenation maintenance strategies were lower by about 6% compared to their counterpart resurfacing. Further, the sensitivity analysis suggested that the gasoline prices, traffic growth rate, discount factor, milling costs, and asphalt mix prices were the most influential factors affecting the lifecycle costs. In addition, the study highlighted that the WM-ZOAB alternatives must function satisfactorily for a design life of at least about 13 years in order to be recognized as cost-effective pavement solutions. The research findings support the transition towards sustainable pavement technologies, while emphasizing the importance of comprehensive economic assessments in decision-making.