COMPACTION OF DEEP LIFT BITUMINOUS STABILIZED BASE

A STREET CONSTRUCTION PROGRAM WAS CONDUCTED USING BITUMINOUS STABILIZED BASE WHICH IS A HOT-PLANT MIX OF BANK RUN GRAVEL AND ASPHALT CEMENT HAVING A PENETRATION OF 85 TO 100. PAVEMENT TEST CORES FROM A SINGLE FIVE INCH LIFT CONSTRUCTION PROVED TO BE 1 PERCENT BETTER COMPACTED THAN THE CORES FROM PAVEMENT CONSTRUCTED WITH TWO 2-1/2 INCH LIFTS. INDICATIONS WERE THAT TEMPERATURE COULD BE A FACTOR IN OBTAINING THESE DENSITIES. THE TEMPERATURES WERE RECORDED WITH THERMOCOUPLES TO CONFIRM THAT TEMPERATURE ASSISTED THE COMPACTION EFFORT. IN SUBSEQUENT WORK, THE GRADATION OF THE MIX WAS ADJUSTED TO OBTAIN THE DESIRE TO PRESENT VOIDS. RESULTS INDICATE THAT MIXED DESIGN IS IMPORTANT IN SINGLE LIFT CONSTRUCTION. LIFTS OF 12, 15, AND 18 INCHES WERE CONSTRUCTED. TEST RESULTS REVEALED THAT: (1) HOT PLANT MIX STABILIZED BASE CAN BE CONSTRUCTED IN A SINGLE LIFT TO ANY DESIGN DEPTH, (2) THICK LIFTS RETAIN HEAT FOR A LONGER PERIOD OF TIME AND THUS PROVIDE AMPLE TIME FOR ROLLING, (3) HEAVY RUBBER TIRED ROLLERS ARE VERY EFFECTIVE FOR COMPACTING THICK LIFTS, AND (4) THE LAY-DOWN TEMPERATURE OF THE MIX IS IMPORTANT BECAUSE THERE IS A RELATIONSHIP BETWEEN LAY-DOWN TEMPERATURE, THE COMPACTION FORCE AND THE DEPTH OF LIFT. A TEMPERATURE-COMPACTION RELATIONSHIP WAS SUBSTANTIATED INDICATING CONSIDERATION OF: (1) VOLUME-THE DEPTH OF THE LIFT, (2) PRESSURE-THE COMPACTION FORCE AND (3) TEMPERATURE - THE LAY-DOWN TEMPERATURE.

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Filing Info

  • Accession Number: 00210780
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 6 1994 12:00AM