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Document Type

Original Study

Subject Areas

Civil Engineering

Keywords

Self-Healing; Induction Heating; Microwave Radiation; Sustainable Asphalt Pavement; Electric Arc Furnace Slag; Steel Wool Fibers

Abstract

Asphalt pavement is a common type of road construction worldwide. It provides excellent performance in terms of comfort, durability, and water resistance. Asphalt pavement roads are susceptible to different types of pavement distresses, which affects its service life. Additionally, excessive utilization of non-renewable materials and massive construction waste has a negative environmental impact. On the other hand, asphalt pavements' self-healing techniques decrease the need for frequent maintenance and repairs of cracks, making them more sustainable over time. Therefore, this paper aims to produce a sustainable asphalt pavement mixture, reduce maintenance costs, reduce the use of natural materials for road maintenance, and dispose of industrial waste. To achieve the above-mentioned goals, up to 20% Electric Arc Furnace Slag (EAFS) as a replacement of natural coarse-aggregate, and three different percentages of Steel Wool Fibers (SWF) were used to prepare asphalt mixtures. Mechanical properties such as Marshall stability, crack resistance, indirect tensile strength, and Moisture resistance were studied. Also, thermal distribution was analyzed and The Three Point bending test (TPB) was used to evaluate the Self-healing efficiency. According to the results, EAFS has good wave absorption capability because it contains a lot of metal oxides. Using both EAFS and SWF in the asphalt mixture results in significant time and energy savings. Also, substituting 20% of natural coarse aggregate with EAFS and adding 0.2% SWF by weight of asphalt mixture is a promising approach. EAFS not only provides the best healing results, but it also improves the mixtures' mechanical properties. The use of EAFS in asphalt mixture is a notable solution that supports sustainable development.

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