Evaluating the Effects of Using Recycled Asphalt Pavements on Fatigue Properties of Warm Mix Asphalt

Abstract

This paper presented an experimental study to characterize thestiffness modulus and fatigue life of warm mix asphalt mixturecontaining recycled asphalt pavements (RAP) with and withouta rejuvenating agent. For this purpose, warm mix asphaltswere produced using Sasobit and Asphamin as two of the mostcommon additive materials. The following five mixes were preparedand tested: a mix with 30% RAP, two mixes with 30%RAP plus warm mix asphalt additives, and two mixes with 30%RAP plus warm mix asphalt additives and a rejuvenating agent.The results indicated no significant difference in the stiffnessmodulus of warm mix asphalt mixtures containing RAP andconventional mixtures including recycled asphalt pavement.However, the indirect tensile fatigue test results showed thatthe addition of the warm mix asphalt additives and rejuvenatingagent improved the fatigue life of the mixtures at differenttemperatures.