PAVEMENT REHABILITATION: BACKGROUND AND INTRODUCTION
RAPIDLY INCREASING VOLUMES OF TRAFFIC ARE STRESSING ROADS BEYOND THEIR ORIGINAL ROAD-CARRYING CAPABILITY DESIGN. MUCH OF THE REHABILITATION AND REINFORCEMENT IS BEING ACCOMPLISHED BY MAINTENANCE FORCES OR BY MAINTENANCE CONTRACTS, WHEREAS IT SHOULD BE ACCOMPLISHED BY RECONSTRUCTION. RECONSTRUCTION CONTRACTS ACCOMPLISH MORE THAN SIMPLY STRENGTHENING THE RIDING SURFACE. SUCH CONTRACTS USUALLY INVOLVE BRINGING ROADS UP TO MODERN STANDARDS BY WIDENING THE ROADWAY, WIDENING THE SHOULDERS, FLATTENING THE SLOPES, AND ELIMINATING HAZARDS SUCH AS EXCESSIVE VERTICAL AND HORIZONTAL CURVATURE. HOWEVER, RECONSTRUCTION REQUIRES THE COMMITMENT OF MORE FUNDS. FINANCES ARE INADEQUATE. A COMPREHENSIVE NEEDS STUDY IN MINNESOTA SHOWS ESTIMATES OF THE COST OF BRINGING THE STATE TRUNK HIGHWAYS UP TO STANDARD. BECAUSE OF LACK OF FINANCES, A RESURFACING PROGRAM IS BEING CONDUCTED TO MAINTAIN A REASONABLE STANDARD OF ADEQUACY. OVERLAYS OF BITUMINOUS SURFACING ARE PROVIDED TO FURNISH A GOOD RIDING SURFACE AND EXISTING SLOPING CURBS ARE REMOVED ON THE OLDER PAVEMENTS. THE COST FOR THIS TYPE OF PROGRAM ARE CITED. IF THE RESURFACING HAS A TEN-YEAR LIFE, WHICH APPEARS REASONABLE, WITH ADEQUATE ROUTINE MAINTENANCE, IT APPEARS TO BE A GOOD INVESTMENT. PRIORITIES FOR RESURFACING PROJECTS ARE BEING ESTABLISHED BY EMPLOYING THE PRESENT SERVICE ABILITY INDEX (PSI) USED ON THE AASHO ROAD TEST AT OTTAWA, ILLINOIS, FOR THE EVALUATION OF PAVEMENT SECTIONS. ON THE BASIS OF THESE SURVEYS, PAVEMENTS WITH LOW PSI RATINGS ARE RECEIVING FIRST CONSIDERATION FOR RESURFACING. THE UNIVERSITY OF MINNESOTA IS DEVELOPING RELATIONSHIPS FOR PREDICTING THE SURFACE LIFE OF FLEXIBLE SURFACES AND THE SERVICE LIFE AFTER RESURFACING. IT IS HOPED THAT THESE RATINGS WILL PROVE USEFUL FOR THE 1972 AND SUBSEQUENT RESURFACING PROGRAMS. DEPENDING ON THE CONDITION OF THE PAVEMENT, RESURFACING HAS VARIED FROM A SPOT LEVELING COURSE TO CORRECT THE MORE SERIOUSLY DETERIORATED AREAS, TO A LEVELING COURSE AND WEARING COURSE, AND FINALLY TO TWO COURSES CONSISTING OF LEVELING AND WEARING COURSES. THE AGGREGATE USE HAS BEEN ALMOST EXCLUSIVELY GRAVEL, WITH OR WITHOUT THE ADDITION OF FILLER TO THE WEARING COURSE MIXTURE.
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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:
- Swanberg, John H
- Publication Date: 1969
Media Info
- Media Type: Digital/other
- Pagination: pp 1-3
- 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: Bituminous materials; Driver rehabilitation; Evaluation; Highways; Leveling; Maintenance management; Needs assessment; Overlays (Pavements); Pavement maintenance; Pavement performance; Pavements; Reconstruction; Resurfacing; Stresses; Surface treating; Traffic volume; Wearing course (Pavements)
- Non-Preferred Terms: Serviceability
- Uncontrolled Terms: Maintenance costs; Rehabilitation; Serviceability Index
- Old TRIS Terms: Bituminous surfacing; Leveling course
- Subject Areas: Design; Highways; Maintenance and Preservation; Pavements;
Filing Info
- Accession Number: 00218566
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Feb 16 1970 12:00AM