Evaluation of Composite Pavements Using a Heavy Vehicle Simulator

Patricio Tapia ； M. Wasantha Kumara ； Mang Tia ； Chung-Lung Wu ； Bouzid Choubane

《International Journal of Pavement Research and Technology》 1卷1期 (2008/01) Pp. 1-11

https://doi.org/10.6135/ijprt.org.tw/2008.1(1).1

並列摘要

A full-scale experiment was performed at the APT facility located at the Florida Department of Transportation (FDOT) Material Research Park to evaluate the feasibility of using whitetopping (WT) pavements in Florida. A total of nine full-scale and instrumented WT test sections were constructed and tested using a Heavy Vehicle Simulator (HVS). A 3-D finite element model was developed to analyze the behavior of the WT pavement test sections. Six of the WT pavement test sections were constructed to have a bonded concrete-asphalt interface, while three of the test sections were intended to have an unbonded concrete-asphalt interface. Using the 3-D model, maximum tensile stresses in the pavement were computed for the critical condition when a 106.8-kN (24-kip) single axle load was placed at the mid-edge of the slab and when the temperature differential in the concrete slab was + 11.1 °C (+20 °F). Based on the computed maximum stresses in the concrete, the expected numbers of repetitions of the 106.8-kN (24-kip) single axle loads at the critical thermal condition were computed for the nine test sections. Results show that the 10cm (4inches) slabs can be used for heavy 106.8-kN (24-kip) single axle loads, but only for low-volume traffic conditions. In order to withstand the critical load without fear of fatigue failure (for an infinite number of critical load repetitions), a minimum slab thickness of 6 inches would be needed for a joint spacing of 1.2m (4ft)，and a minimum slab thickness of 20cm (8inches) would be needed for a joint spacing of 1.8m (6ft).

並列關鍵字

3-D Finite Element Mode ； Bonded Slab ； Composite Pavement ； Concrete-asphalt Interface ； Critical Loading Condition ； Partially Bonded Slab ； Shear Strength ； Temperature Differentia ； Whitetopping.