CRREL FULL-DEPTH TEST SECTIONS: PERFORMANCE DURING FIRST THREE WINTERS

The Benkelman beam was used for the pavement design of a highway in Thailand over soft, deltaic clay soils. Because little technical information on the validity of this technique over soft clays becomes available, research into testing techniques was carried out. It was found that a seasonal deflection effect occurred, that the temperature correction factor is less in tropical countries than in temperate climates, that the movement of the front leg of the Benkelman beam was significant over soft clay subgrades, and that the Canadian test procedure was preferable to the Western Association of State Highway Officials test procdure. It was concluded that design deflection criteria established by Canadian and British pavement trials were applicable to highways over soft clay subgrades, and design deflections for both the Canadian and British Benkelman beam testing procedures were determined. Benkelman beam tests were carried out during construction to check that these values were obtained, and they indicated that practically all readings fell below the design limits. The constructed pavement was therefore considered to be adequate. Tests on various pavement layers indicated that the crushed rock base course was the most effective material in reducing deflections relative to its cost over these soft clays, and this resulted in a pavement redesign that resulted in construction cost savings of $700,000. /Author/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1976/572/572-007.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=CRREL+FULL-DEPTH+TEST+SECTIONS%3A+PERFORMANCE+DURING+FIRST+THREE+WINTERS&author=R.+Eaton&publication_year=1976
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309024854
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Flexible Pavement Design. 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:
  • Eaton, Robert A
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 85-96
• Monograph Title: Pavement Design, Performance, and Rehabilitation
• Serial:
  • Transportation Research Record
  • Issue Number: 572
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bitumen; Construction; Costs; Crushed rock; Deflection; Design; Highway design; Pavement base course; Pavements; Road construction; Soft clays; Subgrade (Pavements); Temperature; Test procedures
• Uncontrolled Terms: Construction costs; Design criteria
• Old TRIS Terms: Pavement deflection
• Subject Areas: Construction; Design; Finance; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00139564
• Record Type: Publication
• ISBN: 0309024854
• Files: TRIS, TRB
• Created Date: Sep 16 1976 12:00AM