Accession Number:

ADA275171

Title:

Granular Bases for Heavily Loaded Pavements

Descriptive Note:

Final rept Feb 1988-Dec 1990

Corporate Author:

NOTTINGHAM UNIV (UNITED KINGDOM)

Personal Author(s):

Report Date:

1993-03-01

Pagination or Media Count:

171.0

Abstract:

This research improves the understanding of the permanent deformation characteristics of granular materials under repeated, reversed shear loadings in flexible pavements. In the laboratory, triaxial tests provided vertical repeated loadings, and a hollow cylinder apparatus was used to apply reversing shear stresses and associated rotating principal planes. The laboratory tests were analogous to larger scale tests that were run, using vertical plate and tire loadings. It was found that higher material densities lead to large improvements in permanent deformation resistance, and permanent deformation is significantly more when stresses are reversed in both the laboratory and in the field. The findings were validated, using two fully-instrumented pilot scale trafficking tests.

Subject Categories:

  • Miscellaneous Materials
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE