Abstract:
THIS PAPER REPORTS THE STUDY OF APPROXIMATELY 60 MILES OF ASPHALTIC CONCRETE PAVEMENT UNDER ACTUAL TRAFFIC CONDITIONS. THE PAVEMENTS VARY FROM 3 TO 8 YEARS OF AGE AND REPRESENT SEVEN CONSTRUCTION PROJECTS. RECOVERY OF THE ASPHALT CEMENT WAS ACCOMPLISHED BY A SIMPLIFIED ABSON METHOD. CHECK TESTS WERE MADE ON THIS METHOD TO DETERMINE ANY EFFECT IT MIGHT HAVE ON ARKANSAS ASPHALTS. DENSITY, ASPHALT CONTENT, AND GRADATION OF AGGREGATE OF THE PAVEMENTS WERE DETERMINED. THE ASPHALT CEMENT RECOVERED FROM THE PAVEMENTS WERE SUBJECTED TO PENETRATIONS, DUCTILITY, SOFTENING POINT, AND ASH CONTENT TESTS. IN SOME CASES THE THIN-FLIM OVEN TEST WAS ALSO MADE. GENERALLY, THE RESULTS INDICATE A RAPID REDUCTION IN THE DUCTILITY OF THE ASPHALT WITH TIME THERE IS ALSO A DECIDED BUT LESS RAPID REDUCTION IN THE PENETRATION OF THE ASPHALT. SAMPLES OF THE PAVEMENT WERE HEATED, REMOLDED, AND TESTED BY THE MARSHALL METHOD. USUALLY, THE STABILITIES WERE QUITE HIGH. /HRB/
Supplemental Notes:
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