Field Evaluation of Reconstructed Roadways Incorporating Full-Depth Reclamation

Several miles of the Kancamagus Highway (Route 112) in New Hampshire were rehabilitated during the 2005 construction season. As part of a research project sponsored by the Recycled Materials Resource Center (RMRC), three test sections were established along a section of that highway where different reconstruction techniques were used: conventional reconstruction, full depth reclamation (FDR), and FDR with cement stabilized base. During the 2005-2006 winter and spring, elevation surveys were conducted to examine frost heave behavior. In 2006, those three test sections were folded into a larger research project sponsored by the New Hampshire Department of Transportation (NH DOT) and USDA Forest Service. For that project, extensive Falling Weight Deflectometer (FWD) testing was conducted during the 2008 spring thaw period to investigate variations in pavement stiffness that result from seasonal changes in temperature and moisture. An additional elevation survey was conducted in July 2009 to check for rutting in the wheel paths. Results of this research suggest that full depth reclamation provides an economic and environmentally friendly alternative for roadway reconstruction. The 2005-2006 data show that the two FDR test sections exhibited more frost heave than the box cut section, presumably due to frost-susceptible subgrade soils which remained in place in those sections. On the other hand, the 2008 FWD data suggest that the overall stiffness of all three test sections was similar. Four years after the initial reconstruction, survey data indicates that little to no rutting has occurred, and visual inspection observed only minimal cracking.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References; Tables;
  • Pagination: 15
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01155557
  • Record Type: Publication
  • Report/Paper Numbers: 10-1791
  • Files: BTRIS, TRIS, TRB
  • Created Date: Jan 25 2010 10:49AM