Preliminary study on the use of microwave permittivity in the determination of asphalt binder penetration and viscosity
Asphalt binder analysis and grading have gone through many stages of facelift starting from the conventional tests such as penetration and viscosity to the recent use of superpave binder test and grading system. Although these approaches have laid the foundation for the testing and grading of asp...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/25963/ http://psasir.upm.edu.my/id/eprint/25963/1/25963.pdf |
| Summary: | Asphalt binder analysis and grading have gone through many stages of facelift starting from
the conventional tests such as penetration and viscosity to the recent use of superpave
binder test and grading system. Although these approaches have laid the foundation for the
testing and grading of asphalt binders, it is observed that the time frame involved and the cost
of testing and equipment are rather costly. As such, a new approach using microwave
technique was carried out to see if there can be any correlation established between the
penetration-viscosity values and the measured microwave permittivity. This paper looks into
the use of microwave frequencies from 8 to 12 GHz on bibder specimens of various
viscosities. An experimental matrix was developed using 3 different binders, 3 additives.
The microwave permittivity was to measure the dielectric constants of the various blends at
temperatures of 25, 30, 35, 40, and 45 °C. Several sets of nomo graphs were estabilished
based on the observed correlation that can be used to determine the penetraion and viscosity
of of saphalt binders using with the measured dielectric constant of the binder material. Such
an approach is expected to be more accurate, repeatable, contactless and non-destructive to
some extent. It shows a great potential to be used as a binder grading method besides the
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conventional and SHRP methods. |
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