Correspondence between Transient and Dynamic Viscoelastic Functions in the Case of Asphalts
For assessing the mechanical properties of asphalts, a variety* of empirical tests are currently used: penetration, softening point, ductility, Fraass breaking point, etc... Although these tests provide useful comparative information, their interest is very limited since the ranges of temperature and loading time where they yield results are very small compared to service conditions. Further, due to the complexity of the loading patterns in such tests, it is difficult to analyze their rheological significance. Therefore, starting from these tests, the field behaviour of asphalts is difficult to analyze or to predict. Consequently, there has been a considerable interest for several years in determining asphalt rheological properties through more fundamental parameters. The mechanical behaviour of asphalt is complex and can be generally described adequately through the viscoelasticity pattern. The range of loading times to which asphalts may be subjected is very wide, depending on the type of application envisaged.
KeywordsShear Strain Dynamic Result Complex Shear Modulus High Shear Strain Shear Strain Amplitude
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