KENTUCKY ROCK ASPHALT BASES AND HOT-MIX SURFACES: EXPERIMENTAL CONSTRUCTION

KENTUCKY ROCK ASPHALT WAS DEVELOPED FOR USE AS A TRAFFIC- BOUND BASE AND SURFACE ON RURAL ROADS NEAR ITS SOURCE AND THE MATERIAL DEVELOPED FOR USE AS HOT-MIXED, HOT-LAID, SKID- RESISTANT SURFACE COURSE FOR HIGH ECHELON ROADS. THE MATERIAL IS A NATURAL ASPHALTIC-SANDSTONE WHICH OCCURS IN ABUNDANCE BORDERING THE KENTUCKY COAL FIELDS. PERFORMANCE OBSERVATIONS OF THE VARIOUS TEST SECTIONS SHOW: (1) WHEN LEAN ROCK-ASPHALT IS USED AS AN EXPOSED TRAFFIC-BOUND SURFACE, THE INDIGENUOUS BITUMEN CONTENT IS TOO LOW TO PROVIDE SUFFICIENT BOND TO WITHSTAND TRAFFIC AND WEATHER BECAUSE THESE BASES ARE POROUS AND SATURATE READILY, (2) SEAL COATS ON LEAN ROCK-ASPHALT BASES IMPROVE RESISTANCE TO DETERIORATION FROM TRAFFIC AND WEATHER, HOWEVER, THE SEALED BASES BUILT TO DATE HAVE DETERIORATED TOO RAPIDLY, AND (3) THE HOT-MIXED ROCK-ASPHALT PLACED ON THE NOLIN DAM ROAD HAS EXCELLENT STABILITY AND SKID RESISTANCE. THIS SURFACE IS QUITE POROUS AND IT IS CONCLUDED THAT HIGH POROSITY IS CONSIDERED AN ESSENTIAL QUALITY FOR GOOD SKID-RESISTANCE.

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Filing Info

  • Accession Number: 00211369
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Mar 24 1994 12:00AM