Effect of fines on mechanical properties of soil-tire chip mixtures

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:564018

Tatlisoz, N ^[1]; Benson, C H; Edil, T B ^[2]

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1. International United Consultants, Inc., Istanbul (Turkey)
2. Univ. of Wisconsin, Madison, WI (United States). Dept. of Civil and Environmental Engineering

Large quantities of waste tires can be beneficially used by incorporating them into structural fill employed in earthwork projects such as highway embankments and backfills for retaining structures. These applications require knowledge of the bulk mechanical properties of tire chips and soil-tire chip mixtures. The objective of the study described in this paper was to evaluate the mechanical properties and behavior of waste tire chips and their mixtures with fine- and coarse-grained soils. Large-scale laboratory testing equipment was used to conduct the study. Tests were conducted to evaluate shear strength, deformability, and compressibility. Mixtures made with typical backfill soils such as clean sand, sandy silt, and clay were tested. Results of the tests show that tire chips and soil-tire chip mixtures behave like soils, but are more compressible and also require more deformation to mobilize their ultimate shear strength. Incorporation of tire chips in the backfill results in a reduction in unit weight and, for mixtures containing sand or sandy silt, an increase in shear strength. In contrast, clay-tire chip mixtures have the same or lower shear strength as clay alone. Strength envelopes for sand-tire chip mixtures can be non-linear, and have virtually no cohesion intercept. Mixtures containing sandy silt behave similar to mixtures made with sand, except the shear strength envelope for the sandy silt-tire chip mixture is linear and has a cohesion intercept. Sand-tire chip and sandy silt-tire chip mixtures exhibit similar long-term compression behavior.

• OSTI ID: 564018
• Report Number(s): CONF-970195--; ISBN 0-8031-2470-8
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
BACKFILLING
BENCH-SCALE EXPERIMENTS
MECHANICAL PROPERTIES
ROADS
SHEAR PROPERTIES
SOILS
TIRES
WASTE MANAGEMENT
WASTE PRODUCT UTILIZATION