A structure‐related model to describe asphalt linear viscoelasticity
作者:
Didier Lesueur,
Jean‐François Gerard,
Pierre Claudy,
Jean‐Marie Letoffe,
Jean‐Pascal Planche,
Didier Martin,
期刊:
Journal of Rheology
(AIP Available online 1996)
卷期:
Volume 40,
issue 5
页码: 813-836
ISSN:0148-6055
年代: 1996
DOI:10.1122/1.550764
出版商: The Society of Rheology
关键词: Asphalt;Colloid;Time‐temperature superposition, asphalt;ASPHALTS;COLLOIDS;VISCOSITY;TEMPERATURE DEPENDENCE;RHEOLOGY;ASPHALTENES
数据来源: AIP
摘要:
Viscoelastic properties of paving grade asphalt cements (AC) were measured on a Rheometrics RDA II. Thermal properties were studied with a Mettler TA 2000 B differential scanning calorimeter. A review of the literature showed that most authors proposed that the time‐temperature superposition principle applies to asphalt over the whole temperature range. However, the results presented herein demonstrate that it indeed fails at high temperature, especially for high asphaltene content and high crystalline content materials. This paper focuses on the role of asphaltenes, which are, by definition, insoluble inn‐heptane. Asphaltenes are suspended in a colloidal manner within the AC matrix and are peptizided by the species called resins. Thus, a temperature dependent solid fraction exists within a liquid (or glassy) matrix. This paper shows that the viscoelastic properties of asphalt are bimodal: they are governed by both solid and continuous phases.
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