EXPERIMENTAL APPLICATION OF ASPHALT EMUSLION HOT MIX

IN 1968 A PORTION OF A BITUMINOUS OVERLAY PROJECT WAS CONSTRUCTED WITH AN ASPHALT EMULSION HOT MIX. THE FINAL IN-PLACE ASPHALT PROPERTIES OF THIS MATERIAL WERE COMPARED TO THE ASPHALT PROPERTIES OF A STANDARD BITUMINOUS CONCRETE. PURPORTEDLY, THE LOWEST MIXING TEMPERATURE POSSIBLE WITH THE EMULSIFIED ASPHALT HOT MIX WOULD ELIMINATE OR AT LEAST REDUCE, THE LOSS OF PENETRATION OF THE ASPHALT THAT OCCURS DURING MIXING AND PLACING. THIS CLAIM WAS NOT VERIFIED BY THIS PROJECT. IN FACT, THE RESIDUAL ASPHALT IN THE EMULSION MIXTURE WAS HARDER THAN THE RESIDUAL ASPHALT IN THE STANDARD MIXTURE. ADDITIONAL EVALUATION OF THE EMULSION MIXTURE WAS PROVIDED BY OBSERVING THE PAVEMENT TEST SECTIONS IN SERVICE. THE DIFFERENCE IN PERFORMANCE BETWEEN THE TWO CONCRETES HAS BEEN LESS APPARENT THAN THE DIFFERENCE IN THE RESIDUAL ASPHALT PROPERTIES. THE MOST NOTABLE DIFFERENCE BETWEEN THE TWO MIXTURES IS THE SURFACE RAVELING NOTED IN THE EMULSION PORTION, WHICH HAS NOT BEEN APPARENT IN THE ASPHALT CEMENT PORTIONS. CLOSE OBSERVATION OF THE PAVEMENT SURFACE REVEALS THAT MORE CRACKING IS DEVELOPING IN THE EMULSION-PAVED PORTION THAN IN THE PORTION PAVED WITH THE ASPHALT CEMENT HOT MIX. /AUTHOR/

Media Info

  • Features: Figures; Tables;
  • Pagination: 16 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00214180
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Jan 3 1973 12:00AM