PERFORMANCE COMPARISON BETWEEN A CONVENTIONAL OVERLAY AND A HEATER-SCARIFICATION OVERLAY

The heater-scarification technique has become one of the most commonly accepted forms of pavement surface recycling in use today. This has been due primarily to the record of successful performance exhibited by these projects over a relatively long period of time. The performance characteristics of a typical heater-scarification overlay project are analytically examined and compared with those of a conventional overlay. The comparison examines fatigue cracking caused by wheel loadings and thermal-fatigue cracking caused by daily temperature cycles. The results are presented for one combination of aged asphalt and recycling agent and one overlay type. The results show that for this combination the commonly held statement that a 19- to 25-mm (0.75- to 1.0-in) depth of heater scarification with 38-mm (1.5 in) of overlay will perform as well as 89 mm (3.5 in) of conventional overlay has some validity. The calculations illustrate the need for laboratory testing to select the best recycling agent for the particular asphalt being recycled and the need to tailor the characteristics of the recycled binder to produce the desired product. (Author)

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1981/821/821-002.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=PERFORMANCE+COMPARISON+BETWEEN+A+CONVENTIONAL+OVERLAY+AND+A+HEATER-SCARIFICATION+OVERLAY&author=S.+Carpenter&publication_year=1981
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309032638
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Characteristics of Bituminous-Aggregate Combinations to Meet Structural Requirements. 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:
  • Carpenter, Samuel H
• Conference:
  • 60th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1981-1-12 to 1981-1-16
• Publication Date: 1981

Media Info

• Media Type: Print
• Features: Figures; Photos; References;
• Pagination: pp 4-12
• Monograph Title: Bituminous mixes, concrete pavements and structures, testing and construction prices
• Serial:
  • Transportation Research Record
  • Issue Number: 821
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Binders; Cracking; Fatigue (Physiological condition); Fracture mechanics; Heaters; Laboratory tests; Overlays (Pavements); Pavement performance; Pavements; Recycling; Scarifying; Thermal stresses
• Old TRIS Terms: Pavement recycling; Thermal fracture
• Subject Areas: Highways; Materials; Pavements; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00348696
• Record Type: Publication
• ISBN: 0309032638
• Files: TRIS, TRB
• Created Date: Jun 30 1982 12:00AM