Eight-Year Field Performance of Portland Cement and Asphalt Stabilized Full-Depth Reclamation Projects

The long-term performance of in situ recycled pavements under service loads has rarely been documented. A number of performance-related questions remain unanswered as to how different pavement recycling methods compare to traditional techniques, such as mill and overlay. This research investigated and compared the structural and functional condition of three full-depth reclamation (FDR) projects. Rutting, fatigue cracking, transverse cracking, and international roughness index (IRI) performance were used to assess the pavement’s functional condition. FDR is a deep in situ pavement recycling method involving pulverizing and reusing existing materials from distressed pavements. Trial sections were constructed in 2008 as part of a Virginia Department of Transportation (VDOT) FDR demonstration project. Foamed asphalt (2.7% with 1% cement), asphalt emulsion (3.5%), and Portland cement (5%) were used as stabilizing treatments for the base layers. Several distress surveys were conducted for the pavement sections, both before and after construction. An automated road analyzer was used to collect distress data over a period of 8 years. Rutting was higher for the foamed asphalt and emulsion sections, but remained well below the maximum allowed by VDOT. The structural and functional capacities of the pavements improved irrespective of the stabilizing treatment used. The load-related distresses seemed to be more critical to the overall condition of the asphalt sections, while the non-load related distresses played a key role in the cement sections. The IRI was better for the cement-stabilized sections compared to the asphalt-stabilized sections. The FDR sections performed better compared to their corresponding reference sections.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 263-272
  • Monograph Title: Airfield and Highway Pavements 2019: Design, Construction, Condition Evaluation, and Management of Pavements

Subject/Index Terms

Filing Info

  • Accession Number: 01717914
  • Record Type: Publication
  • ISBN: 9780784482452
  • Files: TRIS, ASCE
  • Created Date: Jul 18 2019 3:01PM