| Title | Investigation of Low- and High-Temperature Properties of Plant-Produced RAP Mixtures |
|---|---|
| Record ID | 65998 |
| Personal Name Creator |
McDaniel, Rebecca S.; Shah, Ayesha; Huber, G. |
| Personal Name Contributor |
Copeland, Audrey |
| Corporate Creator | United States. Federal Highway Administration. Office of Pavement Technology; United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development |
| Corporate Contributor |
Purdue University. North Central Superpave Center; Turner-Fairbank Highway Research Center |
| Publisher | United States. Federal Highway Administration. Office of Pavement Technology |
| Publication Date | 20120101 |
| Language | English |
| Abstract | Asphalt prices, supply issues, and growing interest in sustainable construction practices are leading to increased use of reclaimed asphalt pavement (RAP) in greater amounts and in more types of mixes. When using more than 15–20 percent RAP under most current specifications (State and national), contractors must change the virgin binder grade added to the mix. This frequently means using a less commonly available binder, which may be more expensive. 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 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. |
| Rosap ID | dot:41731 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/41731 |
| TRT Terms | Reclaimed asphalt pavements; Asphalt pavements; Recycled materials; Pavement performance |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
1366192 |
| Contract Number | DTFH61-08-P-00165 |
| Report Number | FHWA-HRT-11-058 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/65000/65900/65998/FHWA-HRT-11-058.pdf |
| Alternative URL | https://www.fhwa.dot.gov/publications/research/infrastructure/pavements/11058/index.cfm |
| Format | |
| Database | NTL Digital Repository |