Steric hardening and the ordering of asphaltenes in bitumen

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DOIResolve DOI: http://doi.org/10.1021/ef0498667
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TypeArticle
Journal titleEnergy & Fuels
Volume19
IssueJanuary 1
Pages120122; # of pages: 3
Subjectbitumen, steric hardening, asphaltenes, calorimetry, DSC, modulated DSC, MDSC; Roads/Pavement; Roads
AbstractSteric 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
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number47288
16386
NPARC number20378407
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Record identifier7dee6750-c4ad-4d2d-b11d-c22f1432fc62
Record created2012-07-24
Record modified2016-05-09
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