Evaluation of Effect of Rolling Direction on Unbound Material Modulus Using Portable Seismic Pavement Analyzer (PSPA)

In order to provide adequate support to the surface layer of airfield pavement, the base, subbase and subgrade must be compacted to high density. Generally, the pavement materials are compacted by roller in the longitudinal direction. It may cause property variance between the longitudinal and the transverse directions. The Portable Seismic Pavement Analyzer for Soils (D-PSPA) was used to evaluate the effect of rolling direction on unbound material modulus. A series of D-PSPA tests were conducted on subgrade, subbase and base materials at the National Airport Pavement Test Facility (NAPTF) in both the longitudinal and the transverse directions. Single factor analysis of variance (ANOVA) was performed on test results to investigate whether there is a significant difference between the two directions. The preliminary data analysis indicates that the seismic modulus measured in the longitudinal direction is higher than the transverse direction for subbase. Higher seismic modulus was obtained in the transverse direction for base. Subgrade, on the other hand, appears to be not affected by the rolling direction.


  • English

Media Info

  • Media Type: Web
  • Pagination: pp 825-836
  • Monograph Title: Airfield and Highway Pavements 2015: Innovative and Cost-Effective Pavements for a Sustainable Future

Subject/Index Terms

Filing Info

  • Accession Number: 01568850
  • Record Type: Publication
  • ISBN: 9780784479216
  • Files: TRIS, ASCE
  • Created Date: Jun 5 2015 3:02PM