FLEXIBLE PAVEMENT PERFORMANCE STUDY

THE OBJECTIVES OF THIS STUDY WERE /A/ TO RELATE THE PERFORMANCE OF FLEXIBLE PAVEMENTS TO THEIR DESIGN, LOADING AND ENVIRONMENTAL CONDITIONS, AND /B/ TO CHECK THE VALIDITY OF THE DESIGN METHOD IN USE IN 1950. TWENTY-TWO PAVEMENT SECTIONS, RANGING IN LENGTH FROM 4 TO 26 MILES, WERE INCLUDED WHICH WERE CONSIDERED TO BE REPRESENTATIVE OF THE DESIGNS, SOILS, ENVIRONMENTAL CONDITIONS AND TRAFFIC EXISTING WITHIN THE STATE. SAMPLING AND TESTING OF THE PAVEMENT STRUCTURE COMPONENTS AND ROADBED MATERIALS WERE ACCOMPLISHED AT SEVERAL STATIONS IN EACH PAVEMENT SECTION. INITIAL DATE COLLECTED FOR EACH STATION INCLUDED' THICKNESSES OF COMPONENTS, PHYSICAL CHARACTERISTICS, MOISTURE-DENSITY RELATIONS, LABORATORY CBR VALUES, R-VALUE OF UNTREATED COMPONENTS, AND VARIOUS PHYSICAL CHARACTERISTICS OF THE BITUMINOUS MIXES. IN ADDITION, DESIGN TRAFFIC DATA FOR EACH PAVEMENT SECTION WERE OBTAINED. SUBSEQUENTLY THE FOLLOWING DATA WERE COLLECTED' FIELD MOISTURE AND DENSITY, AND TRAFFIC VOLUME AND CLASSIFICATION FOR 1951 TO 1955, INCLUSIVE, CBR VALUES FOR 1951 AND 1952, ROUGHOMETER INDEXES FOR 1953 AND 1954 AND ANNUAL SUFFICIENCY RATINGS FOR 1953 TO 1962, INCLUSIVE. THE FLEXIBLE PAVEMENT DESIGN METHOD ADOPTED IN 1947 IS DESCRIBED. ANALYSES OF THE PERFORMANCE OF 11 PAVEMENT SECTIONS DESIGNED BY THAT METHOD AND MODIFICATIONS ADOPTED IN 1955 ARE DISCUSSED. IT WAS FOUND /A/ THAT THE SUFFICIENCY RATING USED, TOGETHER WITH THE OTHER INFORMATION OBTAINED, IS A FAIRLY EFFECTIVE TOOL FOR DETERMINING THE ADEQUACY OF THE DESIGN METHOD, AND /B/ THAT 82 PERCENT OF THE PAVEMENTS USING THE DESIGN METHOD PERFORMED SATISFACTORILY. REFERECES' COLORADOS FLEXIBLE PAVEMENT DESIGN METHOD. HRB BULL. NO. 126, 1956.

  • Supplemental Notes:
    • Hpr-1/3/, 1477
  • Corporate Authors:

    Colorado Department of Highways

    4201 East Arkansas Avenue
    Denver, CO  USA  80222
  • Publication Date: 1965

Subject/Index Terms

Filing Info

  • Accession Number: 00206264
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Dec 1 1994 12:00AM