The results of a recent study conducted for FHWA are described in this paper. The objective of the study was to develop a ready reference that describes available nondestructive testing (NDT) devices and methods for use in designing the thickness of asphalt concrete overlays for flexible pavements. The report was developed to serve as a guide to practicing highway engineers who are considering the purchase of new equipment or developing (or modifying) overlay design procedures for flexible pavements. Selected overlay design procedures that use NDT input are reviewed. Important components related to the use of NDT data with overlay design procedures are discussed. The following items and their relation to overlay design of flexible pavements using deflection data are discussed in depth: seasonal influences on deflections, location of test points on the pavement surface, frequency of testing, need for cores and laboratory testing, type of NDT measurements (i.e., maximum deflection, basin characterization), additional field measurements that are required, corrections to NDT measurements for temperature and so forth, pavement properties calculated or inferred from the NDT measurements, method used to distinguish between different design sections, relationships that are used to convert NDT measurements to design parameters, relationships that relate design parameters to the useful life of the pavement, and the NDT devices that are available for use.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 11-20
  • Monograph Title: Nondestructive pavement evaluation and overlay design
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00452639
  • Record Type: Publication
  • ISBN: 0309038170
  • Files: TRIS, TRB
  • Created Date: Aug 27 2004 9:59PM