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LABORATORY EVALUATION OF COLORED SYNTHETIC RESIN BINDER MIXES FOR OVERLAY PAVEMENT

SYNTHETIC RESIN BINDER MIXES WERE INVESTIGATED FOR OVERLAY COLORED PAVEMENT. THIS BINDER, A TWO-COMPONENT SYSTEM, IS CONSIDERED TO BE A TYPICAL PETROLEUM RESIN BINDER. THE BINDER IS A FLAKY MATERIAL OF PETROLEUM POLYMERS AND RESINS TO WHICH A PLASTICIZING OIL AND A PIGMENT ARE ADDED TO PRODUCE A COLORED MIX. ONLY TWO COLORS, WHITE AND GREEN, WERE INCLUDED IN THE PROGRAM, AND STRENGTH-TESTS WERE MADE USING THIS BINDER WITHOUT PIGMENTATION. IT IS CONCLUDED THAT THE STUDY INDICATED THAT PIGMENTED SYNTHETIC RESIN BINDER COMBINED WITH GRADED MINERAL AGGREGATE PRODUCES A HIGHLY SATISFACTORY HOT MIX FOR COLORED PAVEMENT CONSTRUCTION. COLORED SYNTHETIC RESIN BINDER MIXES CAN BE PREPARED AND PLACED SIMILARLY TO ORDINARY ASPHALTIC CONCRETE (HOT MIXES) WITH TWO MINOR EXCEPTIONS: WITH COLORED SYNTHETIC BINDER MIXES IT IS NECESSARY THAT EQUIPMENT BE MAINTAINED IN A CLEANER CONDITION AND THAT HIGHER MIXING AND PLACING TEMPERATURES BE USED. THE RELATIVELY HIGH COST OF COLORED SYNTHETIC BINDER PAVEMENT WOULD LIMIT ITS USE TO OVERLAY PAVEMENTS OF ABOUT 1-INCH THICKNESS. THE LABORATORY MIX STUDIES INDICATED THAT A 7.0% BINDER, BASED ON WEIGHT OF TOTAL MIX, PRODUCED THE HIGHEST DENSITY FOR ALL SYNTHETIC BINDER MIXES WITH THE AGGREGATE GRADATION USED. COMPARED TO ASPHALTIC CONCRETE, THE 2-COMPONENT SYNTHETIC BINDER MIXES PRODUCED EXCEPTIONALLY HIGH COMPRESSIVE AND TENSILE STRENGTH. THE WHITE-PIGMENTED MIXES PRODUCED SIGNIFICANTLY HIGHER STRENGTH THAN DID THE GREEN-PIGMENTED MIXES. IT APPEARS THE GREEN PIGMENT HAD SOME ADVERSE EFFECT ON STRENGTH DEVELOPMENT. DENSITY OF A COMPACTED PAVEMENT SHOULD BE AT LEAST 97% OF LABORATORY STANDARD DENSITY TO OBTAIN DESIRED STRENGTH AND UNIFORM SURFACE TEXTURE. RESULTS OBTAINED ON GREEN-PIGMENTED, 2-COMPONENT SYNTHETIC BINDER TEST SPECIMENS SUBJECTED TO THE MARSHALL METHOD OF MIX DESIGN TESTING WERE IN AGREEMENT WITH THE IMMERSION- COMPRESSION TEST RESULTS IN THAT 7.0% BINDER CONTENT WAS OPTIMUM FOR DENSITY AND 8.0 BINDER WAS OPTIMUM FOR STABILITY OR STRENGTH PROPERTIES. COMPARED TO ASPHALTIC CONCRETE, THE 2-COMPONENT SYNTHETIC BINDER MIXES ARE CONSIDERABLY MORE RESISTANT TO SOFTENING AND STRENGTH LOSS DUE TO SOLVENT ACTION OF KEROSENE SPILLAGE ON PAVEMENT. RESISTANCE TO SURFACE WEATHERING, AS INDICATED BY TWO YEARS OF OUTDOOR EXPOSURE TESTS, MAY BE SLIGHTLY LESS THAN AVERAGE ASPHALTIC CONCRETE FOR THE GREEN COLOR FADED SLIGHTLY IN GREEN- PIGMENTED SPECIMENS.

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Filing Info

  • Accession Number: 00210728
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 6 1994 12:00AM