Influence of Flakiness and Elongation Index Compliance on Marshall Parameters in Asphalt Mixtures
DOI:
https://doi.org/10.70028/sgm.v2i1.41Keywords:
Aggregate, Flakiness and Elongation Index, Asphalt Concrete Mixtures, Marshall ParametersAbstract
The road pavement layer comprises coarse aggregate, fine aggregate, filler, and asphalt. Increasing road infrastructure demand has led to a growing need for aggregates. According to Bina Marga, the aggregate flakiness and elongation index in the asphalt-concrete mix is limited to a maximum of 10%, whereas the British Standard and AASHTO in BS 812 set a limit of 25%. This index is assessed only for coarse aggregates with a minimum passing size of 3/8". This study evaluates the Marshall parameters of asphalt concrete mixtures using coarse aggregates that either fulfill and do not fulfill the flakiness and elongation index limits. The coarse aggregates were sourced from two stone crushers in Indrapuri, Aceh Besar, while penetration-grade 60/70 asphalt and Portland cement filler were used. Testing was conducted using the Marshall method at the Highway Laboratory of Universitas Syiah Kuala. The results indicate that mixtures with coarse aggregates exceeding the index limit have an optimum asphalt content (OAC) of 5.85%, while those fulfilling the limit achieve 6.05%. Additionally, asphalt mixtures incorporating compliant aggregates demonstrate superior stability and greater resistance to traffic loads, highlighting the importance of using well-graded coarse aggregates in asphalt concrete mixtures.
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Copyright (c) 2025 Siti Mira Maulida, Ucha Arief Pratama, Rafiqa Muhnita Yusputri, Aulia Rahmad, Aqlima Putri, Yusria Darma, Sofyan M Saleh (Author)

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