Rita Zahara, Darmadi Darmadi, Yusria Darma, Muhammad Hafizh Ryatun Putra
This study investigated the effects of molasses substitution on physical and mechanical properties of porous asphalt mixtures. Asphalt binders with 0%, 3%, and 6% molasses were evaluated for softening point, specific gravity, penetration, and ductility, respectively. Results show that molasses reduced the softening point from 48.15°C to 45.5°C, increased specific gravity, slightly increased penetration, and decreased ductility. Nevertheless, all values remained within AASHTO standards, indicating acceptable binder quality. Porous asphalt mixtures with asphalt content of 5.62% and molasses substitutions were tested using the Marshall Method to assess stability, flow, density, voids in mineral aggregate (VIM), and Marshall Quotient (MQ). The 6% molasses substitution resulted in the highest stability (638.56 kg) and MQ (207.20 kg/mm), indicating improved strength and deformation resistance. Flow decreased with increasing molasses content, while density remained stable. These findings demonstrate that molasses substitution at 6% enhances mixture performance and supports sustainable pavement design by utilizing a renewable industry byproduct. © Published under licence by IOP Publishing Ltd.
Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia; Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia; Department of Civil Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia
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