Elastic anisotropy of tire shreds
- Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Civil Engineering
This paper deals with anisotropic elastic properties of large-size tire shreds used as lightweight fills in road and embankment construction. The anisotropy is a result of compaction and overburden pressure, which induce a layered structure of the shreds. Laboratory experiments conducted in a novel biaxial apparatus revealed a difference in Young`s moduli perpendicular and parallel to the layered structure; also, Poisson`s ratios differ although their values could not be determined accurately. The out-of-plane shear modulus not readily determined from the tests was assessed by means of a layered material model. The results were used for determining the settlement of two road structures containing a layer of tire shreds modeled as either an isotropic or an anisotropic elastic material. Numerical calculations using the code CIRCLY indicated that the effect of tire shreds` anisotropy on road structure settlements is moderate, and the traditional isotropic elastic analysis overestimates the actual settlements.
- OSTI ID:
- 350286
- Journal Information:
- Journal of Geotechnical and Geoenvironmental Engineering, Vol. 125, Issue 5; Other Information: PBD: May 1999
- Country of Publication:
- United States
- Language:
- English
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