Investigation of Low- and High-temperature Properties of Plant-produced RAP Mixtures

Download or read book Investigation of Low- and High-temperature Properties of Plant-produced RAP Mixtures written by Rebecca McDaniel and published by . This book was released on 2012 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides analysis of the results of testing plant-produced hot mix asphalt (HMA) containing various levels of RAP and different grades of virgin binder. The study was undertaken initially to examine the effects of reclaimed asphalt pavement (RAP) on low-temperature properties of mixtures. In phase I of the study, mixes produced by one contractor in 2006 were tested. The results suggest that the addition of RAP stiffened the mix, but probably not to the extent expected based upon linear blending. There is evidence from other research that also suggests that there are cases when linear blending does not apply. Consequently, in phase II of the project, four more contractors replicated the experiment in their HMA plants. The objectives of the study were also expanded to include an evaluation of the extent of blending of the RAP and virgin binders in plant-produced mixtures.