Abstract
The 'Virginia Smart Road test section' project provides an excellent opportunity to test various hypotheses regarding pavement performance, material characteristics, and their combinations. The flexible pavement section includes 12 segments of approximately 100 meters in length, which have been thoroughly studied using a complex arrangement of sensors installed beneath the roadway during its construction. During pavement construction, a Falling Weight Deflectometer (FWD) was used to collect deflection data by applying different loads on the pavement surface. In addition, the resilient modulus of the granular subbase material (21-B) was evaluated. The results of the resilient modulus for the subbase layer (21-B) in the 'Virginia Smart Road' indicate that the material modulus is a function of stress, and its behavior can be predicted using a k-θ model. The deflection results from the FWD testing confirm the stress-dependence of the moduli; however, the FWD results show a less pronounced influence of stress state on the moduli. In general, the modulus obtained through backcalculation can be compared with the modulus measured in the laboratory.
References
Al Qadi, I.L., Nassae, W.M., Louzili, A., Flintsh, G.W,. And Freeman T.E. "Flexible Pavement Instrumentation at the Virginia Smart Road", preprint 00 1275, Transportation Research Board 79 Annual Meeting, January 2000, Washington, DC, 2000.
AASHTO, Standart Test Method for Determining the Resilient Modulus of Soils and Aggregate Materials, AASHTO Designation: TP46 94. AASHTO Provisional Standard, 1994.
Hicks, R.G., Factors Influencing resilient Response of Granular Materials, Ph.D thesis, University of California, Berkeley, CA, 1970.
Allen, J. J., and Thompson, M. R.. Resilient Response of Granular Materials Subjected to Time Dependent Lateral Stresses, Transportation Rewanch Reverd, no. 510, pp 1-13, 1974.
Khedr, S. 1985, Deformation Characteristics of Granular Base course in Flexible Pavements, Tianiportation Research Revond, no. 1043, pp 131 138
Uzan, J., Characterization of Granulat Materials, Transportation Rexxanh Reverd, ne 1022, pp.52 59, 1985.
Wintezak, M. W and Rada, G. 1981. Comprehensive Evaluation of Laboratory Resilient Moduli Results for Granular Material, Transportation Research Record No. 810, pp.23 3.3.
Ullidtz. P. 1998. Modeling Flexible Pavement Response and Performance, Polyteknisk Forlog Lyngby, Denmark.
Huang, Y. J., Pavement Analysis and Design. Prentice Hall, Inc., NJ, 1993.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright (c) 2025 Jenny Chaverri (Traductor/a)