FIELD EXPERIMENTS WITH POWDERED RUBBER IN BITUMINOUS ROAD CONSTRUCTION

THREE FIELD EXPERIMENTS ARE REPORTED WHICH WERE CONDUCTED WITH POWDERED RUBBER IN BITUMINOUS ROAD SURFACES. THE FOLLOWING THREE SECTIONS WERE CONSTRUCTED: (1) POWDERED NATURAL RUBBER WAS INCORPORATED IN THE BITUMINOUS CONCRETES AND ASPHALT WEARING SURFACE, (2) A SIMILAR SURFACE WAS CONSTRUCTED TO WHICH RECLAIMED POWDERED RUBBER WAS ADDED, (3) A SEAL TREATMENT WITH CUT-BACK ASPHALT WAS CONSTRUCTED TO WHICH NATURAL POWDERED RUBBER WAS ADDED AND MIXED IN THE DISTRIBUTER PRIOR TO APPLICATION. IDENTICAL CONTROL SECTIONS WITHOUT RUBBER WERE CONSTRUCTED ADJACENT TO THE EXPERIMENTAL ONES FOR PURPOSES OF COMPARISON. COMPLETE RECORDS WERE SECURED AT THE TIME OF CONSTRUCTION CONCERNING MATERIALS, QUANTITIES, PROCEDURES, TEMPERATURES, WORKABILITY, ETC. FOLLOW-UP STUDIES SINCE CONSTRUCTION INCLUDED VISUAL OBSERVATIONS, ROAD ROUGHNESS MEASUREMENTS, AND SKID TESTS. DATA OBTAINED INDICATE THAT THE INCORPORATION OF NATURAL RUBBER IN THE BITUMINOUS CONCRETE RESULTED IN A SLIGHT DIFFERENCE IN STOPPING DISTANCE AT THE TIME OF CONSTRUCTION, PARTICULARLY AT HIGHER SPEEDS. AFETR SIX MONTHS, GREATER DIFFERENCES IN STOPPING DISTANCES ON WET PAVEMENTS WERE FOUND BETWEEN THE SECTION CONTAINING NATURAL RUBBER AND THE ONE WITHOUT. IT IS CONCLUDED THAT SMALL PERCENTAGES OF NATURAL RUBBER MAY BE BENEFICIAL IN MINIMIZING THE CHANGE IN RESISTANCE TO SKIDDING TO BITUMINOUS PLANT MIXED SAND ASPHALT SURFACES WHEN WET.

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  • Supplemental Notes:
    • No 27, pp 13-24, 10 FIG, 1 TAB, 8 REF Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Shelburne, T E
    • Sheppe, R L
  • Publication Date: 1950

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  • Accession Number: 00211352
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Oct 7 1994 12:00AM