Aging Kinetics Study of Warm mix asphalt based on Softening Point

摘要

Warm mix asphalt is a kind of material with high resource-conserving and low emissions and it is widely used because of its many advantages such as environment-friendly and resources conservation. In order to indicated the aging process and evaluate the aging resistance of warm mix asphalt, softening points of different base asphalt and warm mix asphalt in aging process are studied via the thin film oven test respectively. Then, taking softening point as a parameter, the aging kinetics model is established and the kinetics parameters are also calculated to reflect the aging performance of different asphalts. It is indicated that warm mix asphalt has larger activation energies and lower reaction rate constant than those of base asphalt, and the characteristics of warm mix asphalt after aging are better than those of base asphalt. The aging behavior of warm mix asphalt could be well evaluated by aging kinetics model.