PERFORMANCE AND STRUCTURAL EVALUATION OF CRACKED AND SEATED CONCRETE

The benefits derived from rehabilitating Portland cement concrete (PCC) pavements using asphalt concrete (AC) overlays may be minimized because of reflective cracking in the AC overlay. Reflective cracks can cause early deterioration of the asphalt pavement in the form of raveling and spalling adjacent to the joints. One method that has been successful in reducing reflective cracking is known as "cracking and seating." This method involves cracking the existing PCC pavement into smaller interlocking pieces that have aggregate-to-aggregate contact. This cracked PCC pavement is then seated with a heavy pneumatic-tired roller that prevents rocking or movement of the existing pavement. This procedure reduces the potential for reflective cracking by reducing the amount of movement at the joints due to temperature changes. Cracking the existing PCC pavement into smaller pieces reduces the strength of the rigid pavement, but little information has been published on how much loss is expected. This paper addresses the reduction in pavement strength due to the "cracking and seating" method by evaluating the effective modulus. Effective modulus values for the cracked PCC pavement were determined using measured deflection basins obtained by the Falling-Weight Deflectometer (FWD) and comparing these deflection basins to those predicted by the elastic layer theory. The effective modulus values were obtained for the existing PCC pavement before and after the pavement had been cracked and seated. The effective modulus values of the pavement layers were also determined after placing each intermediate course of AC overlay.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1989/1215/1215-023.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=PERFORMANCE+AND+STRUCTURAL+EVALUATION+OF+CRACKED+AND+SEATED+CONCRETE&author=R.+Ahlrich&publication_year=1989
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1215, Pavement Management and Rehabilitation. 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
• Authors:
  • Ahlrich, R C
• Publication Date: 1989

Media Info

• Features: Photos; References; Tables;
• Pagination: p. 212-218
• Monograph Title: Pavement management and rehabilitation
• Serial:
  • Transportation Research Record
  • Issue Number: 1215
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt concrete; Before and after studies; Concrete pavements; Crack and seat treatment; Deflection; Driver rehabilitation; Falling weight deflectometers; Modulus; Overlays (Pavements); Pavement performance; Pavements; Reflection cracking; Strength of materials
• Uncontrolled Terms: Rehabilitation
• Old TRIS Terms: Effective modulus; Pavement deflection
• Subject Areas: Design; Highways; Maintenance and Preservation; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00494466
• Record Type: Publication
• ISBN: 0309048192
• Files: TRIS, TRB, ATRI
• Created Date: May 31 1990 12:00AM