Effects of incorporating reclaimed asphalt pavement and advera additive into hot mix asphalt at warm temperature

Abstract

Through numerous research works, technologies have been developed that are sustainable and effective in minimizing the environmental impacts as well as costs. These technologies are recycling of reclaimed asphalt pavement (RAP) and warm mix asphalt (WMA) additives. Recycling of RAP is a critical necessity to save valuable aggregates, and reduce the use of costly asphalt binder. WMA technology allows asphalt mixes to be produced at lower temperatures thereby saving energy and cutting CO2 emission. The thesis aims to evaluate the benefits of using Advera as WMA additive into HMA containing RAP. Performance of HMA and WMA are evaluated for their volumetric properties, stability and flow, and strength index by varying three factors; percent RAP, Advera WMA and production temperature. The laboratory test results indicate performance of 15% recycled HMA with WMA additives at 135C is comparable to conventional recycled HMA.