FOUNDATIONS FOR FLEXIBLE PAVEMENTS

FLEXIBLE PAVEMENTS HAVE IN RECENT YEARS BEEN SUBJECTED TO WHEEL LOADS OF INCREASING MAGNITUDE. EXPERIMENTS INDICATE THAT FAILURES ARE PRIMARILY DUE TO PROGRESSIVE PLASTIC DEFORMATION OF THE FOUNDATION WHICH, WITH SUFFICIENT REPETITIONS, CAUSES EXCESSIVE DEFLECTION AND BENDING OF THE BASE AND PAVEMENT. THE REPORT INCLUDES (1) A DISCUSSION OF THE VARIOUS TYPES OF PAVEMENT DEFLECTION, (2) A DESCRIPTION OF ELECTRIC GAUGE EQUIPMENT FOR MEASURING THE DEFLECTION OF PAVEMENTS UNDER BOTH STATIC AND MOVING WHEEL LOADS, (3) A DESCRIPTION OF THE CALIFORNIA BEARING RATIO TEST AND A DESIGN CHART FOR USE WITH THIS TEST, AND (4) A SUMMARY OF THE DEFLECTION AND TRAFFIC TESTS MADE ON A SPECIAL RUNWAY TEST SECTION WHICH WAS CONSTRUCTED AT A WESTERN AIRFIELD BY THE U. S. ENGINEERS FOR CHECKING THE DESIGN CRITERIA FOR HEAVY WHEEL LOADS. /AUTHOR/

• Record URL:
  • https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/22/22-005.pdf
• Supplemental Notes:
  • Vol 22, pp 100-143, 29 FIG, 18 PHOT, 2 APP. 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:
  • Porter, O J
• Publication Date: 1943

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Twenty-Second Annual Meeting of the Highway Research Board Held at Hotel Statler, St. Louis, Missouri December 1-4, 1942
• Serial:
  • Highway Research Board Proceedings
  • Volume: 22
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Airport runways; Bending; California bearing ratio; Deflection; Deflection tests; Design; Flexible pavements; Foundations; Motion; Motor vehicles; Pavement design; Pavements; Plastic deformation; Static loads; Testing; Wheel loads
• Uncontrolled Terms: Design criteria; Moving vehicles
• Old TRIS Terms: Cbr testing; Pavement deflection
• Subject Areas: Design; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00205603
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Jan 26 1970 12:00AM