APPLICATION OF ROAD TEST FORMULAS IN STRUCTURAL DESIGN OF PAVEMENT

THE ANALYSIS OF DATA OBTAINED IN THE AASHO ROAD TEST CONTROLLED TRAFFIC STUDIES RESULTED IN A SET OF EQUATIONS THAT EXPLAINS THE PERFORMANCE OF TEST PAVEMENTS IN TERMS OF PAVEMENT DESIGN, AXLE LOAD AND CONFIGURATION, AND NUMBER OF AXLE LOAD APPLICATIONS. WORK IS DISCUSSED THAT IS BEING PERFORMED BY THE ILLINOIS DIVISION OF HIGHWAYS IN EXAMINING THE ROAD TEST PERFORMANCE EQUATIONS BY COMPARING THE PERFORMANCE OF ILLINOIS PAVEMENTS OF VARIOUS DESIGNS SERVING UNDER TRAFFIC CONDITIONS FOR PERIODS OF TIME WITH THE PERFORMANCE PREDICTED BY THE EQUATIONS. THE PAVEMENTS SELECTED FOR STUDY ARE IN THE RURAL PRIMARY SYSTEM IN AREAS WHERE THE ROAD BED SOILS ARE SIMILAR TO THOSE OF THE ROAD TESTS. THE RESULTS OF THE ILLINOIS STUDY ENCOURAGE THE BELIEF THAT THE ROAD TEST PERFORMANCE EQUATIONS CAN BE MODIFIED SUITABLY FOR PRACTICAL APPLICATION TO RURAL HIGHWAY PAVEMENTS SERVING UNDER NORMAL ENVIRONMENTAL CONDITIONS BY APPLYING DATA FROM EXISTING PAVEMENTS. IT ALSO APPEARS THAT THE EQUATIONS CAN NOT BE APPLIED TO REGULAR RURAL HIGHWAY PAVEMENTS WITHOUT MODIFICATION. DEFINITE TRENDS APPEAR TO HAVE BEEN ESTABLISHED BETWEEN ACTUAL PERFORMANCE OF ILLINOIS PAVEMENTS AND THE PERFORMANCES PREDICTED BY THE ROAD TEST EQUATIONS WHEN SUITABLY MODIFIED. THE STUDY SUGGESTS RELATIVELY SIMILAR PROCEDURES FOR DEVELOPING FACTORS TO MODIFY THE EQUATIONS SO THEY CAN BE APPLIED DIRECTLY TO THE DESIGN AND EVALUATION OF HIGHWAY PAVEMENTS. THE MODIFICATIONS THAT APPEAR TO BE NECESSARY ARE BROUGHT ABOUT BY DIFFERENCES IN BEHAVIOR IN PAVEMENTS SUBJECTED TO LONG TIME TRAFFIC WHILE UNDERGOING GRADUAL DETERIORATION FROM CLIMATIC EXPOSURE AND EXPOSURE TO THE GENERALLY ACKNOWLEDGED ADVERSE EFFECTS OF THE WINTER MAINTENANCE PROCEDURES COMMONLY USED.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/sr/sr73/73-020.pdf
• Supplemental Notes:
  • pp 299-313, 13 FIG, 1 TAB 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
• Corporate Authors:

  Highway Research Board

  2101 Constitution Avenue, NW
  Washington, DC    20418

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Chastain, W E
• Conference:
  • Highway Research Board Conference on the AASHO Road Test
  • Location: St Louis MO, United States
  • Date: 1962-5-16 to 1962-5-18
• Publication Date: 1962

Media Info

• Monograph Title: THE AASHO ROAD TEST - PROCEEDINGS OF A CONFERENCE HELD MAY 16-18, 1962, ST. LOUIS, MISSOURI
• Serial:
  • Highway Research Board Special Report
  • Issue Number: 73
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Axle load force; Equations; Pavement design; Pavement performance; Pavements; Rural highways; Serviceability; Structural design
• Identifier Terms: AASHO Road Test
• Uncontrolled Terms: Serviceability Index
• Old TRIS Terms: Highway pavement
• Subject Areas: Design; Highways; Pavements;

Filing Info

• Accession Number: 00205794
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 26 1970 12:00AM