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Title: INVESTIGATION OF THE INTERRELATIONSHIP BETWEEN BASE PAVEMENT STIFFNESS AND ASPHALT OVERLAY COMPACTION
Accession Number: 00605672
Record Type: Component
Availability: Find a library where document is available Abstract: The degree that base pavement support influences the compactibility of an asphaltic concrete (AC) overlay was determined. As a secondary objective, the FAA Eastern Region in-place air voids compaction standard was compared with the FAA National percent Marshall density compaction standard. Field data were collected on three paving projects in FAA's Eastern Region. Nondestructive testing (NDT) was used to quantify the stiffness of base pavements before construction of overlay. After overlay construction, the unit weights of the asphalt overlays were determined at the same locations at which NDTs were performed, and in-place air voids and percent Marshall densities were computed. Statistical techniques were used to investigate correlations between stiffness and AC density (i.e., unit weight, in-place air voids, and percent Marshall density). Although a mild correlation between stiffness and density was found at one project, no general trends were detected for the other projects or from regression analyses performed on combined data bases. This finding may suggest that base pavement stiffness is not a primary variable affecting overlay compaction on airport pavements; however, the effect of stiffness may have been masked by other external variables such as temperature, rolling, mix properties, or quality control. Finally, apparent inconsistencies in acceptable quality level and payment were observed between FAA Eastern Region and FAA National density acceptance plans. A follow-up study was initiated by FAA to evaluate the basis both of Eastern Region and National acceptance plans for AC. Recently completed, the new study made definitive recommendations for both acceptance plans with regard to (a) acceptance requirements; (b) quality control requirements; (c) acceptance limits for air voids, stability, flow, and density; and (d) a payment adjustment plan for density.
Supplemental Notes: This paper appears in Transportation Research Record No. 1282, Transportation Construction 1990. 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 #: 01411066
Authors: McQueen, Roy DPagination: p. 33-40
Publication Date: 1990
Serial: ISBN: 0309050596
Features: References
(17)
; Tables
(3)
TRT Terms:
Acceptance; Adjustment factors; Air voids; Airport runways; Asphalt concrete; Base course (Pavements); Compactibility; Correlation analysis; Density; Equipment maintenance; Field studies; Flow; Nondestructive tests; Overlays (Pavements); Payment; Quality control; Recommendations; Regression analysis; Specifications; Stability (Mechanics); Standards; Statistical analysis; Stiffness
Uncontrolled Terms: Old TRIS Terms: Subject Areas: Construction; Data and Information Technology; Design; Finance; Highways; Maintenance and Preservation; Materials; Pavements; Research; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings
Files: TRIS, TRB, ATRI
Created Date: Mar 31 1991 12:00AM
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