EFFECT OF MOISTURE ON TYPICAL VIRGINIA SURFACE TREATMENT MATERIALS

SEVERAL ASPECTS OF STRIPPING AND WHIP OFF CHARACTERISTICS OF TYPICAL VIRGINIA SURFACE TREATMENT MATERIALS WERE INVESTIGATED. SIXTY DIFFERENT BINDER-AGGREGATE COMBINATIONS WERE TESTED WITH THE AASHO DESIGNATION T182-57 STRIPPING TESTS, A PLATE IMMERSION STRIPPING TEST, AND A CENTRIFUGE WHIP OFF TEST, THE LAST TWO OF WHICH WERE RECENTLY DEVISED BY THE VIRGINIA HIGHWAY RESEARCH COUNCIL. BY STATISTICALLY EVALUATING THE RESULTS IT WAS CONCLUDED THAT: (1) THE GRADE AND SOURCE OF ASPHALT AND THE TYPE OF AGGREGATE CAUSE SIGNIFICANT DIFFERENCES IN THE STRIPPING CHARACTERISTICS; (2) THE WHIP OFF DECREASES WITH INCREASED CURING TIME; (3) THERE IS NO SIGNIFICANT DIFFERENCE IN PERFORMANCE BETWEEN THE CRUSHED AND THE UNCRUSHED GRAVEL; (4) THE AASHO TEST HAS LIMITED VALUE IN DETERMINING DEGREES OF STRIPPING, WHEREAS THE PLATE IMMERSION TEST OFFERS A VALID METHOD OF NUMERICALLY DETERMINING STRIPPING DIFFERENCES BETWEEN BINDER-AGGREGATE COMBINATIONS; (5) THE AP-00 PERFORMS BETTER THAN THE EMULSIONS; (6) THE CATIONIC EMULSIONS PERFORM BETTER WITH CARBONATES THAN WITH SILICATES; (7) THE LIMESTONE PERFORMS THE BEST AND UNCRUSHED GRAVEL THE POOREST WITH ALL ASPHALTS; AND (8) THERE IS A SLIGHT INTERACTION BETWEEN ASPHALTS AND AGGREGATES. /AUTHOR/

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Filing Info

  • Accession Number: 00210459
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: NTL, TRIS, USDOT, STATEDOT
  • Created Date: Aug 8 1971 12:00AM