RELATIONSHIPS OF AASHO ROAD TEST PAVEMENT-PERFORMANCE OF DESIGN AND LOAD FACTORS.

A SAMPLE IS PRESENTED OF THE PAVEMENT PERFORMANCE DATA AT THE AASHO ROAD TEST AND AN EXPLANATION OF HOW THE DATA WERE SUMMARIZED BY MEANS OF EMPIRICAL EQUATIONS FOR FLEXIBLE AND RIGID PAVEMENT PERFORMANCE. PRESENT SERVICEABILITY AND HISTORIES FOR EACH TEST SECTION WERE PLOTTED AGAINST LOAD APPLICATIONS, THEN SMOOTHED INTO SERVICEABILITY TRENDS BY USE OF MOVING AVERAGES. THE GENERAL FORMULAS ARE PRESENTED FOR FLEXIBLE PAVEMENT SERVICEABILITY TRENDS AND FOR PERFORMANCE OF RIGID PAVEMENT. ALL OF THE POWERS AND COEFFICIENTS IN THE FLEXIBLE AND RIGID PERFORMANCE EQUATIONS WERE DETERMINED THROUGH REGRESSION ANALYSIS OF THE FACTORIAL EXPERIMENT DATA. CRITERIA USED FOR THE SELECTION OF EQUATIONS TO EXPRESS SERVICEABILITY TRENDS: (1) MODELS WERE PREFERRED WHOSE AVERAGE LOG W RESIDUALS WERE SMALLER, (2) MODELS WERE PREFERRED THAT WERE RELATIVELY LESS COMLICATED IN ALGEBRAIC FORM, AND (3) MODELS WERE PREFERED WHOSE EXTRAPOLATED CHARACTERISTICS SEEMED TO AGREE BEST WITH PAST EXPERIENCE AND PRESENT EXPECTATIONS. TERMINAL SERVICEABILITY IS FIXED AT A PARTICULAR VALUE IN PERFORMANCE EQUATIONS. GRAPHS OF RELATIONSHIPS AMONG DESIGN, LOAD AND APPLICATIONS ARE PRESENTED. THE FIRST ROAD TEST OBJECTIVE WAS TO DETERMINE THE EFFECTS OF PARTICULAR PAVEMENT DESIGN AND AXLE LOAD FACTORS ON PAVEMENT PERFORMANCE. IT IS CONSIDERED THAT OF THE CURVES SHOWN AND OTHER CURVES THAT CAN BE COMPUTED FROM THESE PERFORMANCE EQUATIONS SATISFY THE MAIN OBJECTIVES FOR THE FACTORIAL EXPERIMENTS.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/sr/sr73/73-013.pdf
• Supplemental Notes:
  • pp 198-207, 12 FIG 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:
  • Carey Jr, W N
  • Irick, P 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; Flexible pavements; Mathematical analysis; Pavement design; Pavement performance; Regression analysis; Rigid pavements; Serviceability
• Identifier Terms: AASHO Road Test
• Uncontrolled Terms: Serviceability Index
• Subject Areas: Data and Information Technology; Design; Highways; Pavements;

Filing Info

• Accession Number: 00207117
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 26 1970 12:00AM