Extending The Life Cycle of Self-Healed Asphalt Pavements with Recycled Additives

Asphalt is the most used material for constructing road pavements worldwide. However, a major issue that affects asphalt pavement performance and service life is cracking, which is primarily caused by factors such as load and temperature. This paper aims to develop a sustainable asphalt road pavement through the self-healing technique using induction and microwave heating with additives such as electric arc furnace slag (EAFS) and steel wool fiber (SWF). Marshall Stability, Volumetric Properties, Indirect Tensile Strength, moisture resistance, low-temperature cracking resistance, and thermal distribution were studied. The healing index was utilized as an indicator for improving the self-healing of asphalt mixtures. The pavement life cycle was also predicted, and the construction cost was analyzed. The results showed that using EAFS or SWF in the asphalt mixture resulted in significant time and energy consumption. The replacement of natural coarse aggregate with ۲۰% EAFS and/or the addition of ۰.۲% SWF by weight of the asphalt mixture showed promising results in improving mechanical properties, promoting sustainability, and increasing the pavement life cycle by a percentage up to ۴۷%.

کلیدواژه ها:

Sustainable Asphalt Pavement ، Self-healing ، Induction and Microwave Heating ، Asphalt Pavement Life Cycle ، Maintenance and Repair Cost