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4 results for “innovative pavements”
An Innovative Thermo-Energy Harvesting Module for Asphalt Roadway Pavement
<p>The importance of green technologies for generating renewable energy and sustainable development is widely accepted. Road surfaces are exposed to solar radiation that generates thermal gradients and heat flow in the pavement layers. The heat stored can be harvested providing an untapped source of renewable energy. This report presents the design, construction, and assessment of an improved thermoelectric energy prototype for harvesting heat energy from roadway pavements. To accomplish this, various prototype designs were simulated using Finite Element (FE) analysis, followed by design construction and laboratory testing of the most promising prototypes to evaluate their power harvesting capabilities. The main design components of these prototypes are a heat collector/transfer plate, thermoelectric generators (TEG), and a cooling module consisting of a heat sink, phase change material, and an insulation box. The results suggest a direct relationship between thermal gradients and power generation and point out the importance of the cooling module in maintaining the efficiency of the harvester. An optimum harvester design would generate an average power output of 29 mWatt or 835 J over 8 hours per day in South Texas. Extrapolating this output for an installation that covers a length of 1 kilometer of a roadway could produce an average of 23.2 kWh/day, which appears to be a promising independent source of power for roadside signage and sensors.</p>
Enhancing the Durability and the Service Life of Asphalt Pavements through Innovative Light-Induced Self-Healing Materials
<p>Corresponding data set for Tran-SET Project No. 17BLSU02. Abstract of the final report is stated below for reference:</p> <p>"The objective of this study was to evaluate the efficiency of a new generation of Ultraviolet (UV) light-induced self-healing polymers in enhancing the durability and self-healing properties of asphalt mixtures. Self-healing polymers were successfully synthesized in the laboratory and were characterized using Fourier Transform Infrared Spectroscopy (FTIR). In addition, Thermogravimetric Analysis (TGA) results showed that the synthesized polymers achieved the required thermal stability to resist asphalt mixture production processes. Viscosity results showed that addition of 5% Recycled Asphalt Shingle (RAS) and/or 20% Reclaimed Asphalt Pavement (RAP) caused an increase in the viscosity of the binder blends. However, a reduction in viscosity of the binder blends containing recycled asphalt materials was observed when adding self-healing polymers. Semi-Circular Bending (SCB) test results showed that addition of recycled asphalt materials negatively affected the cracking performance of mixtures. However, incorporation of self-healing polymer (SHP) and 48h of UV light exposure improved the cracking resistance. This behavior was more evident with mixtures prepared with an unmodified binder. Loaded-Wheel Test (LWT) results showed that the addition of the self-healing polymer led to an increase in the rut depth of the samples prepared with an unmodified binder. However, the final rut depth was less than 6 mm, which is an acceptable rutting performance. Thermal-Stress Restrained Specimen Test (TSRST) results showed that addition of 5% RAS negatively affected the low-temperature cracking performance of the mix. In contrast, 5% SHP enhanced the low-temperature cracking performance of the mix by increasing the fracture load and decreasing the fracture temperature. For mixtures prepared with an unmodified binder, the optimum crack healing efficiency was observed for the mixtures containing 5% RAS and 5% self-healing polymer and exposed to 48h of UV light. Yet, self-healing polymer did not perform well in mixtures prepared with PG 70-22M polymer-modified binder. This may be due to the interaction between the polymer in the binder and the self-healing polymer."</p>
[OUTDATED] Data set [ref. paper "An innovative automated method for SHM of road pavements based on Hilbert transform"]
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Data set [ref. paper "An innovative automated method for SHM of road pavements based on Hilbert transform"]
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