FLEXIBLE PAVEMENT DESIGN AND MANAGEMENT: SYSTEMS FORMULATION

AN OPERATIONAL PAVEMENT SYSTEMS MODEL (SAMP5), THAT ORGANIZES THE OVER-ALL INFLUENCING FACTORS SUCH AS MATERIALS CHARACTERISTICS, CONSTRUCTION TECHNIQUES, MAINTENANCE REQUIREMENTS, AND ECONOMICS WITHIN A SUITABLE FRAMEWORK FOR FLEXIBLE PAVEMENT DESIGN AND MANAGEMENT HAS BEEN FORMULATED. A COMPUTER PROGRAM HAS BEEN PREPARED USING 58 TO 100 INPUT VARIABLES, AND THE AASHO INTERIM GUIDES FOR DESIGN OF FLEXIBLE PAVEMENTS AS THE STRUCTURAL SUBSYSTEM. DETAILED DESCRIPTIONS FOR USER GUIDES, INPUT FORMS AND DATA FEEDBACK, AND STORAGE SYSTEMS ARE NEEDED FOR MORE EASY IMPLEMENTATION. THE PROCEDURES ARE BEING SUBJECTED TO A SENSITIVITY ANALYSIS AND PILOT TESTING. PROJECT EFFORTS WERE DIVIDED INTO TWO SEPARATE BUT COORDINATED ACTIVITIES, NAMELY, SYSTEMS FORMULATION, AND MATERIALS CHARACTERIZATION. A CONCEPTUAL PAVEMENT SYSTEMS DIAGRAM WAS PREPARED TO ILLUSTRATE THE INTERRELATION OF MANY INPUTS AND SUBSYSTEMS INVOLVED IN A PAVEMENT DESIGN AND MANAGEMENT PROCESS. THE MAJOR CONCLUSIONS OF THE RESEARCH INCLUDE RECOMMENDATIONS FOR A SYSTEMS ENGINEERING APPROACH TO DESCRIBE THE BEHAVIOR AND PERFORMANCE OF THE PAVEMENT SYSTEM AND THE FUNCTIONS OF ITS COMPONENT PARTS; IMPROVEMENTS TO SAMPS INCLUDED THE USE OF ELASTIC LAYERED THEORY AND THE LATEST MATERIALS CHARACTERIZATION INFORMATION; MODIFICATION AND IMPROVEMENT OF THE SUBSYSTEMS AND ULTIMATE UPGRADING OF THE MODEL TOWARD A "PAVEMENT MANAGEMENT SYSTEM." IN THE CHARACTERIZATION OF MATERIALS, CONSTITUTIVE EQUATIONS WERE SELECTED WHICH ADEQUATELY MODELED THE RESPONSE OF PAVING MATERIALS TO THE LOADING CONDITIONS TO WHICH THEY ARE LIKELY TO BE SUBJECTED AS COMPONENTS OF A PAVEMENT. IMPORTANT FINDINGS IN REGARD TO ASPHALTIC CONCRETE, GRANULAR OBSERVATIONS: TEMPERATURE IS THE MOST SIGNIFICANT FACTOR OBSERVATIONS: TEMPERATURE IS THE MOT SIGNIFICANT FACTOR IN DETERMINING THE RESPONSE OF ASPHALTIC CONCRETE; THE RESPONSE OF GRANULAR MATERIALS IS TIME-INDEPENDENT AND COMPLETELY RECOVERABLE; AND WATER CONTENT EXERTS A SIGNIFICANT INFLUENCE ON THE RESPONSE OF THE SUBGRADE SOIL.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/nchrp/nchrp_rpt_139.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00775614
• Supplemental Notes:
  • 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:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • McCullough, B F
  • Hudson, W R
• Publication Date: 1973

Media Info

• Media Type: Digital/other
• Features: Figures; References;
• Pagination: 64 p.
• Serial:
  • NCHRP Report
  • Issue Number: 139
  • Publisher: Transportation Research Board
  • ISSN: 0077-5614

Subject/Index Terms

• TRT Terms: Asphalt concrete; Cohesive soils; Computer programs; Diagrams; Equations; Evaluation; Flexible pavements; Granular materials; Management; Materials; Pavement design; Pavement performance; Pavements; Systems analysis
• Uncontrolled Terms: Characteristics
• Subject Areas: Administration and Management; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00206077
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Nov 14 1973 12:00AM