Evaluation of tire bale performance as fill material for roadbed construction in semi-arid Texas.

摘要

This paper presents the results of research conducted to compare the performance of a test road constructed at the city of Brownsville landfill, Texas using tire bales as fill material with that of a conventional road with soil as fill material. Deflection cells were placed at various locations along both road sections to measure deformation.;Heavy landfill trucks were used to provide loading (stress) to the roadbed and deflection data were collected. The Stress-strain plots indicated that the conventional road exhibited less deflection (0.04 inches) compared to (2.05 inches) for the tire bale road section at a stress of 7,730 psf. The data also suggests current technology for a tire bale road of this type may be more suitable for loads 6490 lbs. Above these load values, the roadbed deflection increases significantly.;Stress-strain comparison with standard material lab tests completed by researchers at UT Austin demonstrated a 6.00% strain (Zornberg et al., 2005) while field tests with tire bales filled with sand and compacted into the road bed showed an average strain of 0.55%.