|
|
|
Title: FIELD PERFORMANCE OF LARGE-STONE HOT MIX ASPHALT ON A KENTUCKY COAL HAUL ROAD
Accession Number: 00624912
Record Type: Component
Availability: Find a library where document is available Abstract: The results of a 3-year pavement performance monitoring program with a primary focus on rutting are summarized. Pavement coring was conducted to determine the magnitude and cause of rutting in individual pavement layers. A pavement trench was excavated for further examination of pavement layers. Field data indicate that rutting was concentrated in steep uphill grade locations where heavy coal trucks travel at very slow speeds. Data from pavement cores and a pavement trench indicate that rutting in the large-stone mix may have been caused by insufficient direct stone-on-stone contact, which made the mixture susceptible to permanent deformation. Observations of the pavement trench at the location where the rutting was greatest (1.8 in.) revealed no definite shear pattern within the cross section of the large-stone base layer. However, laboratory measurements indicated a significant reduction in the air voids content of the top 4 in. of the pavement after 2 years of exposure to coal haul traffic loads. This significant reduction in air voids coupled with a lack of sufficient stone-on-stone contact contributed to the plastic behavior of the material. Pavement elevation data indicate that there has been an overall settlement of the roadway. The settlement may be attributed to consolidation of the subgrade and densification of the drainage blankets caused by upward migration of fines from the dense-graded aggregate into the open-graded No. 57 layer and overall consolidation and penetration of particles along the interface between the two layers.
Supplemental Notes: This paper appears in Transportation Research Record No. 1337, Flexible Pavement Construction, Performance, and Recycling. 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 #: 01404957
Language: English
Authors: Mahboub, KamyarSimpson, AmyOduroh, PaulFleckenstein, JohnPagination: p. 71-78
Publication Date: 1992
Serial: ISBN: 0309052017
Features: Figures
(8)
; Photos
(1)
; References
(6)
; Tables
(5)
TRT Terms:
Air voids; Climbing lanes; Coal; Coal industry; Consolidation; Core samples; Deformation; Densification; Drainage blankets; Freight traffic; Haul roads; Hot mix asphalt; Laboratory tests; Monitoring; Pavement performance; Performance; Ruts (Pavements); Settlement (Structures); Soil stabilization; Subgrade (Pavements)
Uncontrolled Terms: Geographic Terms: Old TRIS Terms: Subject Areas: Design; Freight Transportation; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces
Files: TRIS, TRB, ATRI
Created Date: Sep 11 1993 12:00AM
More Articles from this Serial Issue:
|
