Contact forces in non-bonded pavement materials
Journal article, 2007

We have studied macroscopic stress distributions in horizontal and vertical directions in non-bonded aggregates, as well as the contact forces (local stresses) at the contact areas ("microscopic'). A ring chamber was used to study the horizontal and vertical stresses under static vertical loads, whereas contact area stresses were measured using pressure film placed in different parts of the equipment. The pressure films reveal elevated contact forces at some contact areas in response to the applied load, and the grain size range of the particles also influences the stress (contact force) distribution: fine-grained aggregates distribute forces more evenly than coarse-grained aggregates. When an open fraction of aggregates is used, the coarse-grained aggregates have a greater role in supporting loads, as higher contact forces are transmitted across contact areas between large aggregate particles.

aggregate

BEAD PACKS

non-bonded materials

chamber

FLUCTUATIONS

ring

stress distribution

road

pressure film

Author

M. B. Farmani

University of Oslo

H. Memarian

University of Tehran

Jan Hansson

Chalmers, Civil and Environmental Engineering, GeoEngineering

M. B. Dusseault

University of Waterloo

Road Materials and Pavement Design

1468-0629 (ISSN)

Vol. 8 3 483-503

Subject Categories

Civil Engineering

DOI

10.3166/RMPD.8.483-503

More information

Latest update

11/5/2018