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Title: INVERTED FLEXIBLE PAVEMENT RESPONSE AND PERFORMANCE
Accession Number: 00713509
Record Type: Component
Availability: Find a library where document is available Abstract: An inverted section consists of an unstabilized crushed-stone base sandwiched between a lower cement-stabilized layer and the upper asphalt concrete (AC) surfacing. Two inverted full-scale instrumented pavement sections were tested to rutting or fatigue failure in a laboratory facility. One inverted section had a 152-mm (6-in.) cement-stabilized silty sand subbase. The inverted sections were loaded up to 4.4 million load repetitions at failure. A 28.9-kN (6,500-lb) uniform circular loading was applied to the surface and systematically moved to prevent a punching failure. The inverted sections exhibited better performance compared to conventional and full-depth AC sections also tested. The inverted sections had lower vertical stresses on the subgrade and lower resilient surface deflections than the other sections. The rigid cement-stabilized subbase was effective in bridging a weak subgrade. The inverted section made optimum use of the compressive characteristics of the unstabilized aggregate base where stresses were compressive. A nonlinear finite-element program, GT-PAVE, was used to calculate the resilient pavement response. GT-PAVE did a reasonable job of simultaneously predicting the measured deformation and stress and strain response at six points in the different layers of the inverted sections. A sensitivity analysis indicates the use of a 152-mm (6-in.) unstabilized aggregate base and a 152- to 203-mm-thick (6- to 8-in.) cement-stabilized subbase to be an attractive inverted section design.
Supplemental Notes: This paper appears in Transportation Research Record No. 1482, Pavement Design and Analysis. 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: Monograph Accession #: 01399799
Language: English
Authors: Tutumluer, ErolBarksdale, Richard DPagination: p. 102-110
Publication Date: 1995
Serial: Features: Figures
(6)
; References
(20)
; Tables
(4)
TRT Terms:
Base course (Pavements); Cement; Cement treated soils; Crushed rock; Deflection; Deformation; Deformation curve; Finite element method; Flexible pavements; Load tests; Pavement performance; Pavements; Resilience (Materials); Sensitivity analysis; Silty sands; Soil stabilization; Stresses; Subbase (Pavements); Thickness
Uncontrolled Terms: Old TRIS Terms: Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces
Files: TRIS, TRB, ATRI
Created Date: Nov 7 1995 12:00AM
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