MICHIGAN BITUMINOUS EXPERIMENTAL ROAD-FINAL REPORT

AN EXPERIMENTAL TEST ROAD USING VARIOUS MATERIALS WAS CONSTRUCTED IN MICHIGAN IN AN ATTEMPT TO CORRELATE ACTUAL CONSTRUCTION AND IN-SERVICE PERFORMANCE WITH LABORATORY RESULTS OF NEW SOURCES OF ASPHALT CEMENT. NO PROBLEMS AROSE FROM THESE NEW ASPHALT SOURCES BUT SUBSEQUENT PERFORMANCE OF THE TEST ROAD PROVIDED JUSTIFICATION FOR PERMITTING THEIR USE. STATISTICAL ANALYSES WERE CONDUCTED TO DETERMINE HOW WELL THE VARIOUS TEST SECTIONS PERFORMED. THESE SHOWED A WIDE DISPERSION OR VARIATION IN QUANTITATIVE VALUES OBTAINED FOR THE VARIOUS PROPERTIES OF THE ASPHALT CEMENTS USED AND PAVEMENT DENSITIES, REGARDLESS OF THE MANNER IN WHICH THE DATA WERE GROUPED. PLOTS ARE PRESENTED OF SPECIFIC GRAVITIES AND PENETRATIONS OF RECOVERED ASPHALT EXPRESSED AS A PERCENTAGE OF ORIGINAL PENETRATION VERSUS LENGTH OF PAVEMENT SERVICE IN MONTHS. THESE PLOTS OF DATA FROM WHEEL TRACK PAVEMENT CORES INDICATE AN INCREASE IN PAVEMENT DENSITY UP TO SOME MAXIMUM VALUE AND THEN VERY LITTLE CHANGE. MUCH MORE RUTTING DEVELOPED IN TRAFFIC LANES THAN IN PASSING LANES. NO SIGNIFICANT CORRELATION WAS INDICATED BETWEEN RUTTING AND VERTICAL ALIGNMENT. IN GENERAL, THE GREATEST RUTTING OCCURRED IN THE OUTERMOST LANE AROUND HORIZONTAL CURVES, INDICATING THAT A COMPONENT OF CENTRIFUGAL FORCE CONTRIBUTED TO AN INCREASED FORCE APPLIED NORMAL TO THE PAVEMENT SURFACE IN THESE AREAS. ANOTHER SIGNIFICANT INDICATION IS THAT MORE RUTTING OCCURRED IN THE NORTHBOUND TRAFFIC LANE THAN THE SOUTHBOUND. IT IS BELIEVED THAT THIS IS DUE TO NORTHBOUND TRUCK TRAFFIC BEING MORE HEAVILY LOADED, BECAUSE OF NUMEROUS GRAVEL PITS AT THE SOUTH END OF THE TEST PROJECT. NO CORRELATION COULD BE ESTABLISHED REGARDINT THE RELATION OF INCREASE IN RUT DEPTH TO DECREASE IN ASPHALT VISCOSITY.

  • Supplemental Notes:
    • Vol 36, pp 582-614, 8 FIG, 23 TAB, 5 REF, 3 APP
  • Authors:
    • Serafin, P J
    • Kole, L L
    • Chritz, A P
  • Conference:
  • Publication Date: 1967-2

Subject/Index Terms

Filing Info

  • Accession Number: 00206682
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 6 1994 12:00AM