Yazar "Ahmedzade, Perviz" seçeneğine göre listele

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    Öğe
    Assessment of the Effects of Induction Heating Induced-Healing on the Fracture Properties of Very Thin Asphalt Concrete
    (Springer International Publishing Ag, 2024) Eren, Ezgi; Valentin, Jan; Ahmedzade, Perviz
    Self-healing by induction heating stands as a promising and sustainable technology for asphalt pavement maintenance applications. This study involves performing a series of test cycles, encompassing first SCB fracture testing on a waste steel fiber (WSF)-reinforced for an asphalt concrete for thin surface layers (BBTM) and asphalt concrete for binder layer (ACL), induction heating for healing, and subsequent second SCB fracture testing. The research aims to analyze how crack healing ability changes with a semi-circular bending (SCB) test before and after healing, considering the combination of BBTM and ACL with different WSF content. Based on the SCB test fractural parameters, the healing indexes (HI) are obtained through peak load (Fmax) and critical stress intensity factor (K-IC). Additionally, the fracture parameter results obtained based on the amount of WSF in the BBTMs and ACLs are consistent with the results of the indirect tension to cylindrical specimen (IT-CY) test. Consequently, it was emphasized that asphalt mixtures containing WSF have the potential to heal cracks through induction heating, and the healing ability can be improved depending on theWSF content of the wearing and binder layer. In addition, it was shown that ACL and BBTM samples with higher stiffness values are much more difficult to heal in terms of Fmax and K-IC.
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    Öğe
    Recycling the electric arc furnace waste after geopolymerization in bitumen: experimental analyses and LCA study
    (Springer, 2024) Katanalp, Burak Yigit; Tastan, Murat; Ahmedzade, Perviz
    The conversion of solid waste materials into cleaner products for road paving. applications appears to be a promising and sustainable option. However, there is still a lack of attention given to quantifying the potential environmental benefits of recycling solid wastes in asphalt pavements, regarding the impact on asphalt performance. To address this gap, the present study investigates the effects of recycling electric arc waste based geopolymers on asphalt binder and mixture characteristics, as well as environmental outputs. For this purpose, geopolymers were incorporated into both neat and SBS-modified binders. A comprehensive rheological investigation was conducted using cutting-edge multiple stress creep recovery (MSCR) and linear amplitude sweep (LAS) analyses. Stability, Marshall quotient, and flow values, as well as dry and wetconditioned tensile strength were considered, to determine asphalt mixture properties. In the Life Cycle Assessment (LCA), greenhouse gases resulting from fuel and energy consumption in each inventory phase were determined. The varying service lifetimes, maintenance and rehabilitation plans, and production and construction requirements of the different asphalt schemes were taken into account. Subsequently, the environmental impacts of the asphalt mixtures, including global warming potential, acidification, eutrophication, and smog formation potential, along with the total energy demand, were calculated across different stages of the LCA. The results show that the geopolymerization process results in important contributions in terms of both environmental savings and pavement performance.