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วิทยาลัยเทคโนโลยีและนวัตกรรมวัสดุ
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คณะวิศวกรรมศาสตร์
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Asphalt pavements in Thailand frequently deteriorate due to moisture damage and rutting under tropical climate and heavy traffic, leading to high maintenance costs. Conventional rehabilitation by milling and replacing damaged layers generates large amounts of Reclaimed Asphalt Pavement (RAP). Although RAP is reused to enhance sustainability, its aged binder suffers from oxidative hardening and reduced performance, requiring rejuvenation. Most conventional rejuvenators are petroleum-based and contribute to environmental pollution. Therefore, this study proposes environmentally friendly alternatives using bio-oil and biochar derived from sugarcane bagasse, along with Fatty Acid Methyl Ester (FAME), to restore RAP performance while promoting sustainable waste utilization. The objective of this research is to evaluate the effects of different proportions of these natural rejuvenating agents on recycled asphalt mixtures containing 80% RAP and 20% virgin aggregates. The mixtures were tested using the Marshall Stability and Tensile Strength Ratio (TSR) tests under dry and wet conditions to assess strength and moisture susceptibility. The results aim to determine whether these natural materials can effectively restore RAP properties to meet standard performance requirements.