ADVANCED CHARACTERIZATION OF GRANULAR MATERIALS FOR MECHANISTIC BASED PAVEMENT DESIGN

The recent adoption and use of mechanistic concepts in pavement design made it possible to more realistically characterize the unbound aggregates component of the pavement by incoporating the new advances in characterization, i.e., anisotropic, stress path dependent behavior, and accounting for the most damaging field conditions. This paper mainly focuses on the use of a unique triaxial testing machine, referred to as University of Illinois FastCell (UI-FastCell), for determining in the laboratory the stress induced anisotropic resilient properties of twelve aggregates with varying material types and properties. In the selection process, consideration was given to both "good" and "poor" performing granular base/subbase materials obtained from 7 different states. The directional dependency of resilient properties is adequately determined; and nonlinear stress dependent models are developed to characterize the resilient moduli of the 12 aggregates under extreme loadings. Finally, the effect of aggregate quality on anisotropic modular ratios corresponding to horizontal and vertical pulsing conditions is investigated.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 51-72
  • Monograph Title: PAVEMENT SUBGRADE, UNBOUND MATERIALS, AND NONDESTRUCTIVE TESTING

Subject/Index Terms

Filing Info

  • Accession Number: 00799102
  • Record Type: Publication
  • ISBN: 9780784405093
  • Report/Paper Numbers: GSP No. 98
  • Files: TRIS
  • Created Date: Sep 3 2000 12:00AM