Investigation of the Influence of Warm Mix Asphalt Additive Dose on theWorkability, Cracking Susceptibility, and Moisture Susceptibility of AsphaltMixtures Containing Reclaimed Asphalt Pavement

摘要

In this study, the influence of the dose of two Warm Mix Asphalt (WMA) additives (Advera(R) AndSasobit(R)) on the binder properties and mixture properties in terms of workability, cracking susceptibilityand moisture susceptibility was investigated. Two Superpave mixtures, a 12.5 mm with 10 percentReclaimed Asphalt Pavement (RAP) and a 19.0 mm with 25 percent RAP, were used for this study.Binder testing showed that the addition of Sasobit(R) At any dosage tested changed the performance grade ofthe binder and decreased the binder viscosity. The addition of Advera(R) at the dosage tested did notchange the performance grade of the binder and only marginally changed the binder viscosity.Workability testing of the mixtures showed that both WMA additives improved the workability of themixtures at any dosage tested. Moisture susceptibility testing showed that the WMA additives tested atany dose increased the moisture susceptibility of the mixtures. Cracking susceptibility testing showed thatthe addition of Advera(R) increased the cracking resistance of the mixtures at any dosage tested, whereas theaddition of Sasobit(R) only increased the cracking resistance of the mixture at a dose of 1.5 percent.