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Abstract:
In order to get a better evaluation on high-temperature feature of asphalt binder, conducted on dynamic shear rheometer (DSR) and based on the oscillation test to fix the asphalt PG high-temperature grade, multiple stress creep recovery (MSCR) test was employed to contrastively evaluate the high-temperature rutting potential of neat binder and SBS modified binder. Test results indicate that the G*/sinδ determined from the oscillation test in the existing specification is well applied for neat asphalt but really does not work for modified asphalt, whereas the recovery percent R determined from the MSCR test is able to characterize the delay elasticity of modified asphalt well, and the nonrecoverable compliance Jnr measured in MSCR test is developed as a replacement for the G*/sinδ to evaluate the high-temperature rutting properties for binders. Additionally, the SBS modified binder is found more sensitive to the stress levels than the neat binder.
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Source :
Journal of Beijing University of Technology
ISSN: 0254-0037
Year: 2013
Issue: 12
Volume: 39
Page: 1849-1854,1860
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 3