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Title:

PERFORMANCE OF UNBONDED CONCRETE OVERLAY PROJECT IN CANADA

Accession Number:

00676543

Record Type:

Component

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Order URL: http://worldcat.org/isbn/0309060567

Abstract:

The rehabilitation of concrete freeways has challenged highway authorities for many years. This challenge has been met with the use of various techniques such as full- and partial-depth repairs, diamond grinding, and unbonded overlays. In 1989 the Ontario Ministry of Transportation constructed a project to demonstrate the feasibility of using these techniques on the freeways in its jurisdiction and to monitor the long-term performance of the freeways rehabilitated by these various techniques. The project incorporated the use of full-depth and partial-depth repairs, which was followed by diamond grinding and joint sealant replacement on the northbound lanes. The southbound lanes received a 180-mm-thick undoweled plain-jointed unbonded portland cement concrete overlay, which is the focus of this study. Design of the overlay was undertaken by using PCA design guides, which used the familiar Corps of Engineers square root equation. During the design phase falling-weight deflectometer (FWD) testing was undertaken to assess the pavement condition. Following construction an extensive program was implemented to systematically monitor long-term performance. The program included FWD testing for corner-to-center deflection ratios and joint load transfer efficiencies, along with roughness and skid resistance testing and condition surveys. Roughness and skid resistance measurements have been completed on an annual basis, with FWD testing and condition surveys carried out as needed. The design and construction of the unbonded overlay are highlighted, and the results of the performance monitoring program carried out on this 4-year-old project are detailed.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1449, Design and Rehabilitation of Pavements. 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 Accession #:

01401288

Language:

English

Authors:

KAZMIEROWSKI, T J
Sturm, Harry

Pagination:

p. 169-173

Publication Date:

1994

Serial:

Transportation Research Record

Issue Number: 1449
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309060567

Features:

Figures (4) ; References (8)

Geographic Terms:

Subject Areas:

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Files:

TRIS, TRB

Created Date:

Apr 10 1995 12:00AM

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