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Steric hardening and the ordering of asphaltenes in bitumen

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1021/ef0498667
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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
Subjectbitumen, steric hardening, asphaltenes, calorimetry, DSC, modulated DSC, MDSC; Roads/Pavement; Roads
Abstract
Steric hardening is the hardening of bitumen over time at room temperature. It occurs after bitumen is melted and it often leads to poor reproducibility in standard testing. Modulated differential scanning calorimetry shows that asphaltenes order when bitumen is cooled from the melt and that this phenomenon is time dependent. This communication establishes the link between the ordering of the asphaltenes in bitumen and its steric hardening. It is suggested that at least 24 h elapse between the melting and pouring of bitumen and its subsequent testing by standardized methods.
Publication date
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  • Energy & Fuels 19, no. January 1 (1 January 2005): 120–122.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 47288
NRC-IRC-16386
NPARC number20378407
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Record identifier7dee6750-c4ad-4d2d-b11d-c22f1432fc62
Record created2012-07-24
Record modified2020-04-07
Date modified: