Influence of Reclaimed Asphalt Pavement in Hot Mix Asphalt
Publication: International Conference on Transportation and Development 2024
ABSTRACT
The application of reclaimed asphalt pavement (RAP) materials in the pavement construction industry has been on an upward trajectory due to cost considerations and the need for sustainability. The scarcity of road construction materials may be effectively addressed by integrating RAP in developing countries like Bangladesh. This paper provides a comprehensive and insightful evaluation of RAP utilization alongside natural aggregate for road construction purposes. Various recycling processes have been applied across the world, and this study emphasizes the hot mix recycling method and its potential use for the construction of new pavement layers. In this study, recycled aggregates from six different locations show slightly downgraded properties but still fall within specified limits. Consequently, recovered bitumen from the rotary evaporator performs satisfactorily in rheological testing, although oxidation and aging have caused variations in some of its properties. This paper determines the influence of using different RAP percentages (0%, 30%, 50%, 70%, and 100%) and bitumen content (0%−6.5%) in hot mix asphalt (HMA) on the Marshall test results. Incorporating 70% reclaimed asphalt pavement (RAP) yields the greatest strength, while concurrently requiring an addition of bitumen content of 0.8%−1.5%. The research concludes that recycled pavement materials can produce stable and durable bituminous mixes, contributing to sustainable infrastructure development.
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International Conference on Transportation and Development 2024
Pages: 404 - 415
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Published online: Jun 13, 2024
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