Karami, Muhammad and Nikraz, Hamid and Sebayang, Surya and Irianti, Laksmi
Laboratory experiment on resilient modulus of BRA modified asphalt mixtures.
International Journal of Pavement Research and Technology.
ISSN 1996-6814
(Submitted)
Abstract
The objective of this research is to determine the potential effect on the resilient modulus of asphalt mixtures of using
granular Buton rock asphalt (BRA) modifier binder. The indirect tensile stiffness modulus (ITSM) tests were performed
to examine the resilient modulus of unmodified and BRA modified asphalt mixtures for dense graded aggregates of 10
mm (DG10) and 14 mm (DG14) based on standard AS-2891.13.1-1995. In this tests, three percentage of BRA natural
binder, including 10%, 20% and 30% by total weight of asphalt binder, were chosen as a substitute for the base
asphalt binder in the BRA modified asphalt mixtures, with the purpose was to improve the resilient modulus values.
According to the test results, the resilient modulus of BRA modified asphalt mixtures was higher than for the
unmodified asphalt mixtures. A higher percentage of BRA modifier binder content resulted in a higher resilient
modulus. Furthermore, the unmodified and BRA modified contained only 20% BRA modifier binder of DG-10 were
tested under different conditions of temperature, rise time, and pulse period. The results indicated that the BRA
modified asphalt mixtures contained 20% BRA modifier binder were less sensitive to the changes in the temperature,
traffic volume and loading frequency. In addition, the substitution of 20% BRA modifier binder reduced the effect of the rest period ratio and loading time on the resilient modulus of the asphalt mixtures.
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Laboratory experiment on resilient modulus of BRA modified asphalt mixtures. (deposited 12 Jun 2017 07:30)
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