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Title: FIELD AND LABORATORY EVALUATION OF THE MECHANICAL BEHAVIOR OF UNBOUND GRANULAR MATERIALS IN PAVEMENTS
Accession Number: 00641441
Record Type: Component
Availability: Find a library where document is available Abstract: Laboratory and full-scale pavement studies were conducted as a part of an overall program to evaluate the engineering properties and performance of eight gradings of unbound granular roadbase materials. A repeated load triaxial testing program was conducted in conjunction with shear box and permeability tests on unbound mixes with grading curves ranging between the two extremes of the envelope currently used as a specification in the United Kingdom. After analyzing the laboratory results, full-scale trials were conducted using eight experimental gradings. The pavement test strip was divided into eight 22-m bays. Dynamic cone penetrometer, density, and moisture content measurements were performed on the subgrade, capping layer, and roadbase material. The performance of each bay under heavy traffic was monitored for 6 months. The rut depth profile was recorded using an automatic computerized rut profiler, and deflection measurements were recorded weekly by the deflectograph. Falling weight deflectometer testing was conducted three times. The objective of the research was to identify a material that would allow free drainage and hence reduce pumping and excess pore water pressure but maintain a high in situ stiffness with good resistance to permanent deformation.
Supplemental Notes: This paper appears in Transportation Research Record No. 1406, Construction Robotics and Automation, and Foundations Engineering. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Construction robotics and automation, and foundations engineering Monograph Accession #: 01403255
Language: English
Authors: Kamal, M ADawson, A RFarouki, O THughes, DABSha'at, A APagination: p. 88-97
Publication Date: 1993
Serial: ISBN: 0309055539
Features: Figures
(12)
; References
(15)
; Tables
(1)
TRT Terms:
Accelerated tests; Aggregate gradation; Cone penetrometers; Deflection; Density; Drainage; Field tests; Granular materials; Laboratory tests; Moisture content; Pavement performance; Pavements; Performance evaluations; Permeability; Pore water pressures; Properties of materials; Repeated loads; Rutting; Stiffness; Triaxial shear tests
Old TRIS Terms: Subject Areas: Design; Geotechnology; Highways; Hydraulics and Hydrology; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I42: Soil Mechanics
Files: TRIS, TRB, ATRI
Created Date: Jan 25 1994 12:00AM
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