Application of Intelligent Compaction Technique in Real-Time Evaluation of Compaction Level During Construction of Subgrade

The long term performance of an asphalt pavement depends on the quality of the supporting subgrade. Achieving a proper compaction level is, therefore, very important. Traditionally, the level of compaction is monitored through spot checking of moisture content and dry density at some discrete points on the compacted subgrade. However, randomly selected points do not adequately represent the entire compacted area and could leave undetected soft spots. This paper presents the findings of a study investigating the ability of the Intelligent Asphalt Compaction Analyzer (IACA), developed at the University of Oklahoma, in estimating the subgrade resilient modulus ((Mr), in real-time. Field study was conducted at two different project sites. A vibratory compactor was instrumented with the IACA and the Mr values (Mr-IACA) were continuously recorded during the compaction of the stabilized subgrade. In the first project, IACA was evaluated by comparing the Mr-IACA values with the Falling Weight Deflectometer (FWD) backcalculated subgrade modulus (MFWD) (R2 = 0.63; error = ±15%). In the second project, Mr-IACA values were compared with the Mr values obtained from regression models (Mr-reg) developed based on the laboratory Mr test results (R2 =0.63; error = ±15%). In both the projects, it was found that IACA can provide the estimates of Mr with an acceptable accuracy, in real time.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee AFS10 Transportation Earthworks.
  • Corporate Authors:

    Transportation Research Board

    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Authors:
    • Barman, Manik
    • Nazari, Moeen
    • Imran, Syed Asif
    • Commuri, Sesh
    • Zaman, Musharraf
    • Beainy, Fares
    • Singh, Dharamveer
  • Conference:
  • Date: 2014

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 18p
  • Monograph Title: TRB 93rd Annual Meeting Compendium of Papers

Subject/Index Terms

Filing Info

  • Accession Number: 01506371
  • Record Type: Publication
  • Report/Paper Numbers: 14-5183
  • Files: TRIS, TRB, ATRI
  • Created Date: Feb 3 2014 9:17AM