Characterisation of long term field aging of polymer modified bitumen in porous asphalt

Conference paper (2012)

Authors

S. Erkens Ministry of Infrastructure and the Environment
Affiliation
External organisation
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Published Date

2012

Language

English

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Affiliation

External organisation

Abstract

The effect of long term field aging on different types of polymer
modified binders used in two-layer porous asphalt is studied using different test
methods. Chemical and rheological tests are performed on samples taken from
road sections at different moments in time in search of trends in long term field
aging.
The results show that chemical analyses performed with GPC and mfrared can
be used to study the effect of short term aging. However, these tests are not
accurate enough to establish the more subtle trends that play a role i n long term
field aging. The tests proved to be very valuable to determine the type of
modification in the binder.
Master curves showing the complex modulus and the phase angle at different
temperatures determined with the Dynamic Shear Rheometer (DSR) show linear
trends for long term aging when an aging period of 8 years is observed. As
expected the complex modulus increases with aging, while the phase angle
decreases. There is one exception to this, in polymer modified binders the phase
angle decrease with age at low loading frequencies which can be related to
degradation of the polymer modification.
Long term f i e ld aging, polymer modified binder, GPC, FTIR, DSR.