Utilization of Coconut Fiber in Stone Mastic Asphalt Mixtures
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Abstract
In this study, coconut fiber of 5-20 mm-long with various contents of 0, 0.1, 0.3, and 0.5% incorporated with AC60/70 and 12.5 mm NMAS were used to prepare mixtures for SMA. Properties of mixture including volumetric properties, Marshall Stability, draindown, and TSR were determined and investigated. The results revealed that mixture containing 0.3% of 5-20 mm-long coconut fiber yielded to the optimum requirements. With this coconut fiber content, there was a significant improvement of properties with higher Marshall Stability by 10.52% and lower draindown by 55.35% compared to mixture containing 0% coconut fiber. Moreover, 0.3% of coconut fiber provides the highest. The finding of this study may offer the alternative choices for local authority to have more materials to consider for pavements construction.
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