Backcalculated Asphalt Stiffness in a Pavement Section in New Mexico

Asphalt concrete (AC) is considered spatially homogeneous material while analyzing and designing asphalt pavement. However, stiffness of AC along wheel path and middle of wheel path may not be same considering the continuous compaction by wheel loading. This study conducted monthly falling weight deflectometer (FWD) test to determine the AC stiffness on a pavement section on Interstate 40 (I-40) in the state of New Mexico, USA from 2013 to 2015. The AC stiffnesses on the wheel path, on the middle of the wheel path, on the shoulder with friction course and on the shoulder without friction course have been determined. It is mentionable that the driving lane and the shoulder have same geometry, materials and compaction effort. Results show that stiffness along the wheel path is almost same to that of along the middle of wheel path. Shoulder without friction course has stiffness greater than that of lane AC stiffness and shoulder with friction course. In addition, FWD backcalculated moduli at different temperatures are found to be close to the laboratory determined complex moduli between 0.1 Hz and 0.5 Hz of loading.


  • English

Media Info

  • Media Type: Web
  • Pagination: pp 67-74
  • Monograph Title: Geo-China 2016: Material, Design, Construction, Maintenance, and Testing of Pavement

Subject/Index Terms

Filing Info

  • Accession Number: 01609612
  • Record Type: Publication
  • ISBN: 9780784480090
  • Files: TRIS, ASCE
  • Created Date: Jul 21 2016 3:10PM