CONDITION SURVEYS USED IN OKLAHOMA TO EVALUATE FLEXIBLE PAVEMENT DESIGN

THE PROCEDURE IS OUTLINED FOR MAKING FLEXIBLE PAVEMENT CONDITION SURVEYS AND ITS USE IN EVALUATING THE FLEXIBLE PAVEMENT DESIGN OF THE OKLAHOMA HIGHWAY DEPARTMENT. THE FLEXIBLE PAVEMENT DESIGN WAS ADOPTED IN 1947. THE THICKNESS DESIGN USES CALIFORNIA BEARING RATIO CURVES. THE TESTING PROGRAM TO EVALUATE THE PERFORMANCE OF THE PAVEMENT COLLECTED DATA ON THE FOLLOWING CLASSES: (1) CONSTRUCTION SUCH AS TYPICAL PAVEMENT SECTION, TYPE OF CONSTRUCTION, AND QUALITY TESTS OF MATERIALS MADE DURING CONSTRUCTION, (2) OTHER EXISTING DATA WHICH INCLUDED GEOLOGY, WEATHER, ORIGINAL SOIL SURVEYS, TRAFFIC DATA, AND MAINTENANCE COSTS, (3) FIELD DATA WHICH INCLUDED CONDITIONING SURVEYS OF THE PAVEMENT STRUCTURE, ROUGHOMETER SURVEYS, FIELD CHECKS OF THE ORIGINAL SOIL SURVEYS, AND PEDOLOGICAL SOIL SURVEYS, (4) FIELD TESTS INCLUDING PLATE BEARING TESTS, BENKELMAN BEAM DEFELCTION TESTS, FIELD CALIFORNIA BEARING RATIO TESTS, DENSITY TESTS, MOISTURE TESTS, AND THE TAKING OF SAMPLES FOR LABORATORY TESTING, AND (5) LABORATORY TESTS WHICH INCLUDED ROUTINE LABORATORY TESTING TO DETERMINE WHETHER FIELD SAMPLES CONFORMED TO SPECIFICATIONS FOR THE SUBBASE, BASE, AND SURFACE COURSES. MAINTENANCE COSTS PER MILE WERE CALCULATED. THE DEPRECIATION PER MILE PER YEAR OF THE PAVEMENT STRUCTURE WAS USED AS A BASIC FACTOR IN THE STUDY TO DETERMINE THE RELATIONSHIP AND EFFECT OF THE FOLLOWING: (1) LOAD SUPPORTING ABILITY OF THE PAVEMENT STRUCTURE AS DETERMINED BY PLATE BEARING TESTS AND BENKELMAN BEAM DEFLECTION TESTS, (2) THICKNESS OF THE 'AS BUILT' PAVEMENT STRUCTURE, (3) TRAFFIC AND WHEEL-LOAD DENSITIES, (4) SOIL AND GEOLOGICAL EXTENTS, (5) CLIMATIC CONDITIONS, (6) QUALITY OF SUBBASE, BASE, AND SURFACE COURSES OF THE PAVEMENT STRUCTURE, (7) THE ORIGINAL CONSTRUCTION COSTS OF THE PAVEMENT STRUCTURE, AND (8) THE MAINTENANCE COST SINCE COMPLETION OF THE PAVEMENT STRUCTURE. A RAPID DEPRECIATION RATE WAS FOUND INDICATING THAT THE PAVEMENT STRUCTURE WAS UNDESIGNED FOR THE POOREST SOIL TYPES AND RESULTED IN THE DEVELOPMENT OF AN INTERIM DESIGN METHOD WHICH EXTENDED THE DESIGN CURVE TO GIVE GREATER THICKNESS OF THE PAVEMENT STRUCTURE FOR THE POOREST SOILS. THE RELATIONSHIP BETWEEN THE SUBGRADE INDEX NUMBERS AND THE CALIFORNIA BEARING RATIOS OF THE SOILS WAS DETERMINED, AND THE APPROPRIATE PAVEMENT THICKNESS WAS DETERMINED FROM STANDARD CBR CURVES FOR SUBGRADE INDEX NUMBERS.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/289/289-005.pdf
• Supplemental Notes:
  • No 289, pp 75-79, 1 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.
• Authors:
  • Ferguson, R P
• Conference:
  • 40th Annual Meeting of the Highway Research Board
  • Location: Washington DC, United States
  • Date: 1961-1-9 to 1961-1-13
• Publication Date: 1961

Media Info

• Media Type: Digital/other
• Pagination: 5p
• Monograph Title: Flexible pavement design developments 1961
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 289
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Benkelman beam; Building materials; California bearing ratio; Climate; Coefficient of subgrade reaction; Condition surveys; Construction; Costs; Density; Field tests; Flexible pavements; Geological surveying; Maintenance management; Measurement; Pavement design; Pavement performance; Plate bearing test; Quality control; Road meters; Soils; Testing; Thickness
• Uncontrolled Terms: Construction costs; Maintenance costs
• Old TRIS Terms: Cbr testing; Density measurement; Quality control testing; Thickness design
• Subject Areas: Construction; Finance; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00205748
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 28 1994 12:00AM