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Title: ROAD TEST TO DETERMINE IMPLICATIONS OF PREVENTING THERMAL REFLECTION CRACKING IN ASPHALT OVERLAYS
Accession Number: 00173944
Record Type: Component
Availability: Transportation Research Board 500 Fifth Street, NW Find a library where document is available Abstract: In predominantly cold climatic regions, thermal cracking of asphalt pavements and its reflection through bituminous resurfacings is a problem of great concern to the pavement engineers. Reflection cracking causes poor riding quality prematurely, reduces the useful life of a resurfacing, requires accelerated maintenance, and results in an uneconomic use of physical and fiscal resources. Over the years, many treatments have been tried to minimize the reflection cracking in bituminous resurfacing. These treatments have exhibited varying degrees of success; however, none has been consistently successful under all conditions. In Ontario, Canada, eight test sections were constructed in 1971 to determine a viable alternative to the predominantly used conventional resurfacing. A special feature of this experimental road is the two test sections in which the existing asphalt surface was pulverized and used with or without additional asphalt binder as a base for the resurfacing. In this paper, the phenomenon of thermal cracking and its mechanisms and manifestations are discussed. The experimental road is described and the performance of its various test sections over the past 5 years is documented. An economic analysis is conducted in which the trade-offs between the initial construction and the future maintenance costs of various treatments are compared to the costs of a conventional resurfacing. This analysis concludes that pulverization of the existing pavement surface and use of that surface as a base for resurfacing is the most viable alternative to a conventional resurfacing. The paper also describes three full-scale contracts, totaling about 50 km (31 miles), in which treatment was recently used in Ontario. /Author/
Supplemental Notes: Publication of this paper sponsored by Committee on Design of Composite Pavements and Structural Overlays. 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 #: 01411478
Authors: Kher, RameshPagination: pp 37-44
Publication Date: 1977
Serial: ISBN: 030902658X
Media Type: Digital/other
Features: Figures
(9)
; Maps; Photos; Tables
(3)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Construction; Design; Finance; Highways; Maintenance and Preservation; Pavements; Vehicles and Equipment
Files: TRIS, TRB
Created Date: May 18 1978 12:00AM
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