Laboratory Evaluation and Mechanistic-Empirical Performance Analysis of Polymer Coated Rubber (PCR) Mixtures

Polymer modification techniques of asphalt binders are getting popularity for the advantages of being cost effective and improving the performance of asphalt pavements. It has been found that polymer modification offers additional elastic recovery and viscosity to the neat binder. This research study attempted to evaluate one of the crumb rubbers modified asphalt technologies called “Polymer Coated Rubber (PCR)” by means of both dry and wet technology. In this study, the PCR modified mixtures (dry & wet) were compared to a traditional polymer (SBS) modified mixture to evaluate whether it can outperform the polymer modified asphalt mixture at equal or lower cost. As part of the laboratory evaluation, PCR (dry & wet) and SBS modified binders were prepared and PG tests on modified binders and several performance tests on modified mixtures were performed. Also, to better understand the long-term performance of the polymer modified mixtures under traffic loads, Mechanistic-Empirical analyses were performed. For this, a recently introduced Mechanistic-Empirical analysis software called “Mechanistic Empirical Asphalt Pavement Analysis software (MEAPA)” was used. The overall results revealed that although SBS modified mixture performed better than the PCR modified mixtures, both mixtures are expected to perform well in the field. On the other hand, PCR-wet modified mixtures perform slight better than PCR-dry.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 16p

Subject/Index Terms

Filing Info

  • Accession Number: 01763603
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-03695
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:07AM