Abstract
This research proposal aims to advance the understanding and optimization of hydronic asphalt pavements, where embedded pipes function as a "floor-heating system", for clean and sustainable energy harvesting and enhanced structural integrity. The study addresses the complex interaction between the fluid flow field inside the embedded pipes and on the pavement surface, asphalt and fluid temperature fluctuations, and mechanical responses (changes in asphalt stiffness), investigating their collective impact on the mechanical behaviour of hydronic pavements. Novel experimental techniques, such as Digital Image Correlation and Fiber Bragg Grating sensors, will be employed to examine cracking behaviour and stress/strain distribution under various conditions. The research comprises three main objectives: assessing structural integrity and mechanical properties using advanced technologies such as X-ray computed tomography, developing a comprehensive Thermo-Hydro-Mechanical finite element model, and optimizing energy-harvesting capacity while preserving structural performance. This multidisciplinary approach aims to fill gaps in existing research by combining insights from material testing, experimental studies, and advanced numerical modelling. The outcomes will contribute to recommendations and guidelines for the optimum design of hydronic asphalt pavements, which can be implemented in future design and construction for resilient infrastructure and renewable energy systems.
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