Exploring Thermal Performance of PCM Fibre-Reinforced Asphalt Mixtures: A Design of Experiments Approach

This study explores the impact of Phase Change Fibres (PCF) in asphalt mixtures on urban heat control and pavement durability, especially under diverse climate conditions. The incorporation of PCF in pavements offers an adaptive response to temperature fluctuations, presenting a promising approach for urban resilience and sustainable infrastructure development. The research involves coaxial fibres produced via wet spinning, utilizing cellulose acetate for the sheath and Polyethylene Glycol in the core. The Design of Experiment (DoE) methodology aids in determining the optimal fibre incorporation rate. Asphalt samples with varying fibre contents and lengths undergo testing for heat absorption and dissipation rates. Results indicate that mixtures containing 10 mm fibres at a 0.55% concentration exhibit slower cooling rates compared to non-fibre mixtures, suggesting enhanced thermal regulation. These findings point to the potential of such mixtures in mitigating the Urban Heat Island (UHI) effect and improving pavement longevity.