PROCEDURE FOR THE SELECTION OF ASPHALT CONCRETE RESURFACING THICKNESS
THE ILLINOIS DIVISION OF HIGHWAYS IS ATTEMPTING TO DEVELOP AN EMPIRICAL DESIGN PROCEDURE FOR COMPOSITE PAVEMENT. IT IS HOPED THAT THE PROCEDURE WILL DETERMINE THE THICKNESS OF ASPHALTIC CONCRETE RESURFACING NECESSARY TO EFFECTIVELY REHABILITATE EXISTING PORTLAND CEMENT CONCRETE PAVEMENTS. ALREADY COMPLETED AND PUT INTO PRACTICE ARE TWO INTERIM PROCEDURES FOR THE STRUCTURAL DESIGN OF RIGID AND FLEXIBLE PAVEMENTS THAT ARE BASED ON THE AASHO ROAD TEST PERFORMANCE EQUATIONS. THE DEVELOPMENT IS BEING MADE OF A THIRD INTERIM PROCEDURE FOR DETERMINING THE THICKNESS OF RESURFACING NEEDED IN REHABILITATING EXISTING PORTLAND CEMENT CONCRETE PAVEMENTS. THIS PROCEDURE WILL PERMIT THE DETERMINATION OF THE THICKNESS OF RESURFACING NEEDED TO REHABILITATE AN EXISTING RIGID PAVEMENT AND IS BASED ON A CONSIDERATION OF THE THICKNESS AND CONDITION OF THE EXISTING PAVEMENT, THE TYPE OF RESURFACING TO BE USED, THE VOLUME AND COMPOSITION OF TRAFFIC TO BE SERVED BY THE REHABILITATED PAVEMENT, AND THE LENGTH OF TIME THE REHABILITATED PAVEMENT IS EXPECTED TO ADEQUATELY SERVE THIS TRAFFIC. THE SAME PROCEDURES ARE BEING USED THAT WERE USED IN DEVELOPING PROCEDURES FOR RIGID AND FLEXIBLE PAVEMENT DESIGN POLICIES. FACTORS WERE DEVELOPED FOR CONVERTING PASSENGER CARS AND AVERAGE SINGLE-AND- MULTIPLE-UNIT COMMERCIAL VEHICLES INTO EQUIVALENT NUMBERS OF APPLICATIONS OF AN 18-KIP SINGLE AXLE LOAD FOR EACH OF THE FOUR CLASSIFICATIONS OF HIGHWAYS. THUS, MIXED-TRAFFIC AXLE LOADINGS WERE CONVERTED TO A COMMON DENOMINATOR TO PERMIT COMPARISONS WITH THE AASHO ROAD TEST PERFORMANCE EQUATIONS. AASHO ROAD TEST PERFORMANCE EQUATIONS WERE TESTED FOR APPLICABILITY TO ILLINOIS PAVEMENTS IN REGULAR SERVICE. RESULTS SHOW THAT BOTH RIGID AND FLEXIBLE PAVEMENT EQUATIONS PREDICTED HIGHER LEVEL OF PERFORMANCE THAN THOSE ACTUALLY OBTAINED, BUT A MODIFICATION OF THE DESIGN TERM SUITABLE MODIFIED THE EQUATION. DESIGN NOMOGRAPHS ARE PRESENTED INCLUDING A TRAFFIC FACTOR SCALE, A SOIL SUPPORT SCALE, AND A STRUCTURAL DESIGN SCALE. THE TWO PROCEDURES ARE BEING USED IN THE DEVELOPMENT OF A COMPOSITE PAVEMENT DESIGN PROCEDURE. IT IS HOPED THAT THIS DESIGN PROCEDURE WOULD BE ONE OF DETERMINING THE TOTAL STRUCTURAL DESIGN REQUIREMENTS, DETERMINING THE PORTION OF THE TOTAL REQUIREMENT THAT WOULD BE SATISFIED BY THE EXISTING PAVEMENT STRUCTURE AND USED AS THE BASE COURSE, AND DETERMINING THE THICKNESS OF NEW SURFACING NEEDED TO COMPLETELY SATISFY THE REQUIREMENTS.
- Record URL:
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Supplemental Notes:
- Paper sponsored by Committee on Salvaging Old Pavements by Resurfacing, Maintenance of Bituminous Pavements, and Maintenance of Portland Cement Concrete Pavements and presented at the 48th Annual Meeting. 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.
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Authors:
- Schwartz, Donald R
- Warning, C Ronald
- Publication Date: 1969
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 59-65
- Monograph Title: Design of overlays and pavement rehabilitation
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Serial:
- Highway Research Record
- Issue Number: 300
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Asphalt concrete; Axle load force; Composite pavements; Concrete pavements; Driver rehabilitation; Equations; Evaluation; Flexible pavements; Nomographs; Pavement design; Pavement performance; Pavements; Portland cement concrete; Resurfacing; Rigid pavements; Thickness
- Identifier Terms: AASHO Road Test
- Uncontrolled Terms: Rehabilitation
- Old TRIS Terms: Existing pavements; Thickness design
- Subject Areas: Highways; Maintenance and Preservation; Pavements;
Filing Info
- Accession Number: 00218574
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Feb 16 1970 12:00AM