Asphalt Emulsion Residue Recovery Update

The use of latexes and polymers in asphalt emulsion applications to improve field performance created a challenge for the recovery of the residue using traditional oven evaporation or distillation techniques (260ºC). Those techniques recovered the residue at temperatures that deteriorated the polymers used and therefore the procedures were adjusted to lower temperature techniques (177ºC or 204ºC) to reduce the breakdown of the polymers used in the asphalt emulsion manufacture. A vacuum distillation procedure at 135ºC was also introduced to lower the temperature to recover the residue. These techniques use temperatures that are still much higher than the field application temperatures for these products. Recent evolution of lower-temperature evaporative techniques at 60ºC can provide a residue that is at summer field conditions and allows material to be evaluated through improved rheological techniques. The following report shows the development of recovery techniques that are similar to field conditions, and the test results that compare those techniques to the higher-temperature recovery procedures. An update of further developments to improve the time to recover the residue and possible aging issues is also provided.

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; Photos; Tables;
  • Pagination: pp 8-12
  • Monograph Title: Progress Toward Performance-Graded Emulsified Asphalt Specifications
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01521736
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Apr 2 2014 3:30PM