Karami, Muhammad (2018) Fatigue performance of Buton rock asphalt modified mixtures. International Journal of Pavement Research and Technology. ISSN 1996-6814 (Submitted)

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Abstract

The main objective of this research is to assess the effect of granular Buton rock asphalt (BRA) modifier binder on the fatigue life of asphalt mixtures. Laboratory evaluation method of fatigue strength on four point bending equipment under repeated flexural bending test was done in accordance with Austroads test method. The beam test under the controlled-strain mode of loading was applied for a dense grading of 10 mm of unmodified and BRA modified asphalt mixtures at the test temperature of 20°C, tensile strain of 400, 600 and 800 µε, frequency of 10 Hz, loading mode of continuous haversine and void of 5%. The results show the number of cycles for BRA modified asphalt mixtures increased by 2.0-2.4, and 1.6-2.1 observed by the using classical and energy stiffness ratio, respectively. According to the strain approach, the number of cycles to failure for BRA modified asphalt mixtures was higher when compared with unmodified asphalt mixtures. Based on the strain-stiffness approach, the initial flexural stiffness affected the fatigue life of asphalt mixtures. The cycles to failure of BRA modified asphalt mixtures were higher than for unmodified asphalt mixtures as initial flexural stiffness increased by up to 13,030 MPa and 11,500 MPa for classical and energy stiffness ratio approach, respectively. Furthermore, the regression equations model used to predict the fatigue life of unmodified and BRA modified asphalt mixtures were developed. The use of BRA modifier binder in asphalt mixtures had a significant effect on the relationship between intercept (k1) and slope (k2) variables.

Item Type: Article
Uncontrolled Keywords: asphalt mixtures; fatigue performance; granular Buton rock asphalt
Subjects: T Technology > TE Highway engineering. Roads and pavements
Divisions: Fakultas Teknik (FT) > Prodi Teknik Sipil
Depositing User: Dr. Muhammad Karami
Date Deposited: 29 Jun 2018 04:11
Last Modified: 29 Jun 2018 04:11
URI: http://repository.lppm.unila.ac.id/id/eprint/8225

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