EXPERIMENTAL SAND ASPHALT SURFACE

THIS REPORT PRESENTS A SUMMARY OF CONSTRUCTION PROBLEMS ENCOUNTERED DURING THE CONSTRUCTION OF 23 PAVEMENT PROJECTS USING SILICA SAND-ASPHALT MIXTURES. THESE INCLUDE TEARING OF THE ASPHALT MAT, UNEVENNESS OF EXISTING SURFACES, INEXPERIENCE, TRAFFIC, INSTABILITY, AND SCALING. RECOMMENDATIONS TO REMEDY THESE PROBLEMS ARE MADE AND INCLUDE PREPARATION OF OLD PAVEMENT, ADDITION OF SILICONE, HIGH MIXING TEMPERATURES (310 DEGREES F-325 DEGREES F), USE OF HARDER GRADES OF ASPHALT, AND PLACEMENT WHEN AMBIENT TEMPERATURES ARE ABOVE 70 DEGREES F. THE REPORT ALSO INCLUDES A SHORT DISCUSSION ON THE SCALING PROBLEM AND THE USE OF MINERAL FILLERS. INCLUDED IN THE REPORT ARE SOME SKID RESISTANCE MEASUREMENTS, SILICA CONTENT DATA, AND THE CONSTRUCTION RECORDS AND SPECIAL PROVISIONS FOR THE PROJECTS. /FHWA/

Subject/Index Terms

Filing Info

  • Accession Number: 00210447
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: 64-8
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jan 11 1971 12:00AM