Verification of an Asphalt Aging Test and Development of Superior RecyclingAgents and Asphalts

摘要

This study has two principal objectives: to develop a satisfactory aging test tostudy the effect of recycling on oxidative hardening and to study the effect of recycling agent composition on the properties of recycled blends. Perhaps the most significant finding is that the effect of temperature and pressure on asphalt oxidation is very asphalt dependent, and any test run at a single elevated temperature and pressure can be highly misleading. At the same time, equations have been developed which express asphalt oxidation rates in terms of both temperature and pressure so that with sufficient data, rates can be predicted at any road condition.