X-ray fluorescence detection of waste engine oil residue in asphalt and its effect on cracking in service

@article{Hesp2010XrayFD,
  title={X-ray fluorescence detection of waste engine oil residue in asphalt and its effect on cracking in service},
  author={Simon A. M. Hesp and Herbert F. Shurvell},
  journal={International Journal of Pavement Engineering},
  year={2010},
  volume={11},
  pages={541 - 553}
}
This paper documents the discovery of waste engine oil residues in pavements across Ontario, Canada. We have found that recovered asphalts from a large majority of poorly performing contracts test positive for zinc through X-ray fluorescence (XRF) analysis. In contrast, neither the aggregates nor any of the well-performing asphalts showed any signs of the metal. Since zinc dialkyldithiophosphates are universal additives in engine oils, we inferred that the use of waste oil residues in asphalt… Expand
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