Implementation of GPC characterization of asphalt binders at Louisiana Materials Laboratory : research project capsule.

Details

• Creators:
  Daly, William H. ; Morvant, Mark J. ; Abadie, Chris
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  Louisiana. Dept. of Transportation and Development ; Louisiana State University (Baton Rouge, La.)
• Subject/TRT Terms:
  Asphalt Binders
• Publication/ Report Number:
  10-6B
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  Louisiana has been using polymer modified asphalt cement (PMAC) increasingly for
  
  better pavement performance. More often than not, elastomers became the
  
  asphalt modifiers of choice due to their excellent elasticity and good compatibility
  
  with asphalt species. A new analytical tool is needed for assessing the presence
  
  and quantification of the amount of the elastomer modifier, both in a supplied
  
  PMAC and in a liquid extracted from pavement cores. Due to a large difference
  
  between the molecular mass of polymer molecules and the mass of asphalt
  
  components, the polymer can easily be visualized through a size exclusion analysis,
  
  such as gel permeation chromatography (GPC). GPC methodology can be applied to
  
  routine characterization of asphalt binders and can employ the technique in
  
  forensic analysis of paving problems. It traces PMAC dissolved in tetrahydrofuran
  
  (THF) solution and styrene-butadiene-styrene (SBS) polymer dissolved in decalin
  
  solution. The samples are injected into a set of porous columns and eluted with
  
  THF. The order of elution is related to the molecular weight of the component. High
  
  molecular weight species elute first followed by molecules with ever decreasing
  
  molecular weight. This study will evaluate the amount of the polymeric species in a
  
  polymer modified asphalt binder, the changes imparted by the addition of recycled
  
  asphalt pavement (RAP) to the mix, and mixes containing a crumb rubber modifier
  
  (CRM). Utilization of GPC to monitor the amount of the polymeric material in polymer
  
  modified asphalt binders could conceivably establish a better characterization of
  
  asphalt materials.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9b1285c56c66bd8ecb4c18a33ba8c5780b66725af27193615e9a985e0273ef0a
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/20300/dot_20300_DS1.pdf
• File Type:
  [PDF - 138.48 KB ]