FACTORS INVOLVED IN THE DESIGN OF ASPHALTIC PAVEMENT SURFACES

A REVIEW IS PRESENTED ON ASPHALTIC SURFACE COURSE MATERIALS, PROPERTIES, TESTS, AND DESIGN CONSIDERATIONS. THE FACTORS WHICH INFLUENCE THE DESIGN OF ASPHALTIC SURFACES IN TERMS OF LOADING CONDITIONS, STRENGTH REQUIREMENTS AND MIX PROPERTY ARE SPECIFICALLY STUDIED. THESE FACTORS INCLUDE: RHEOLOGICAL PROPERTIES, FRACTURE OR TENSILE STRENGTH, THERMAL STRESSES, FATIGUE CHARACTERISTICS, AND DURABILITY OR LONG-TIME PERFORMANCE. A BRIEF REVIEW IS INCLUDED OF SUCH FACTORS AS DESIGN FOR STANDING LOADS, DESIGNS FOR BRAKING AND ACCELERATION AND DESIGNS FOR ORTHOTROPIC BRIDGE DECKS. LITERATURE REVIEW HAS SHOWN THAT IT IS POSSIBLE TO ANALYZE ASPHALTIC MIXTURES ACCORDING TO THE THEORY OF ELASTICITY FOR A GIVEN SITUATION AS REPRESENTED BY THE MODULUS OF ELASTICITY OR STIFFNESS MODULUS. THE METHODS HAVE BEEN DEVELOPED WHICH MAKE IT POSSIBLE TO READILY PREDICT THE STIFFNESS MODULUS OVER A WIDE RANGE OF TEMPERATURES AND TIMES OF LOADING FROM A COMPARATIVELY LIMITED NUMBER OF TESTS. ASPHALTIC MATERIALS ARE TREATED AS ELASTIC OR LINEAR VISCOELASTIC MATERIALS MOST OF THE TIME. FRACTURE STRENGTH OF ASPHALTS AND ASPHALTIC CONCRETE WAS EVALUATED AT VARIOUS TEMPERATURES AND LOADING CONDITIONS. TENSILE STRENGHT OF ASPHALTIC CONCRETE AT LOW TEMPERATURES HAVE BEEN REPORTED AT VALUES RANGING FROM 550 TO 1400 PSI WITH STRAINS OF APPROXIMATELY 1 PERCENT. THERMAL STRESSES IN ASPHALTIC CONCRETE CAN BE CALCULATED ON THE BASIS OF THE KNOWLEDGE OF THE THERMAL PROPERTIES OF AN ASPHALTIC-AGGREGATE SYSTEM AND TEMPERATURE CONDITIONS. FATIGUE PROPERTIES WERE CONSIDERED ONE OF THE MORE IMPORTANT ASPECTS OF THE INVESTIGATION BECAUSE IT COMBINED ASPHALTIC CONCRETE PROPERTIES WITH THE STRUCTURAL DESIGN REQUIREMENTS OF AN ASPHALT-TYPE PAVEMENT. TEST PROCEDURES ARE DESCRIBED, WHICH WHEN COMBINED WITH MULTI-LAYERED THEORY FOR COMPUTING STRESS AND STRAIN IN THE ASPHALTIC SURFACING, CAN BE USED AT LEAST QUALITATIVELY TO PREDICT EXPECTED PERFORMANCE. THE STIFFNESS MODULUS IS SHOWN TO BE A GOOD DETERMINANT OF FATIGUE LIFE. IN REGARD TO DURABILITY, THERE APPEARS TO BE A DEFINITE CORRELATION ESTABLISHED BETWEEN ASPHALT CONSISTENCY AND LONG-TERM PERFORMANCE. REQUIREMENTS FOR THE DESIGN OF ASPHALTIC SURFACINGS SUBJECTED TO UNIQUELY HIGH STRESS DUE TO STANDING LOADS, ACCELERATION, OR DECELERATION ARE DISCUSSED. TEST METHODS FOR EACH FACTOR ARE DISCUSSED.

  • Availability:
  • Supplemental Notes:
    • No 39, pp 1-112, 126 FIG, 40 TAB, 169 REF, 1 APP
  • Authors:
    • Finn, F N
  • Publication Date: 1967

Media Info

  • Serial:
    • NCHRP Report
    • Issue Number: 39
    • Publisher: Transportation Research Board
    • ISSN: 0077-5614
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 00205568
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: May 24 1994 12:00AM