Sürdürülebilir Kentsel Altyapı Mühendisliği Ana Bilim Dalı Tez Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/424

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Browsing Sürdürülebilir Kentsel Altyapı Mühendisliği Ana Bilim Dalı Tez Koleksiyonu by Subject "asphalt"

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    The use of waste plastics in asphalt mixtures
    (Abdullah Gül Üniversitesi, Fen Bilimleri Enstitüsü, 2022) Şaka, Şükrü; AGÜ, Fen Bilimleri Enstitüsü, Sürdürülebilir Kentsel Altyapı Mühendisliği Ana Bilim Dalı
    Within the scope of this study, the use of waste plastics in asphalt mixtures for surface layer of pavements was evaluated considering the specification limits in the Highways Technical Specifications of Turkiye General Directorate of Higways. Waste plastic data collected in Talas region has been used, a circular economy model has been created and its contributions have been evaluated. Polyethylene type of waste plastics as high and low density were used to replace bitumen in hot asphalt mixtures with 7.5 to 12.5% by weight of bitumen. The optimum binder content currently used by the Talas municipality was kept constant as (5%). In the context of Highways Technical Specifications, Marshall stability and flow values of the mixtures with and without waste plastics were determined and 10% replacement level were selected to use for further testing due its maximum stability and proper flow value (2-4 mm). Air voids, voids filled with bitumen, voids in mineral aggregates parameters on asphalt mixtures as well as softening point and flash point of bituminous binders were also determined. In addition, environmental impacts of asphalt mixtures with and without waste plastic replacement were examined via life cycle assessment methodology in the scope of cradle-to-gate.10% replacement of bitumen with waste plastics increased stability, air voids, voids in mineral aggregates and decreased flow and void filled with bitumen of asphalt mixtures as compared with the control. Softening point and flash point of bitumen increased with waste plastic replacement. Considering the environmental impact of with and without waste plastic replacement asphalt mixtures, abiotic depletion, ozone layer depletion, terrestrial ecotoxicity, and eutrophication values increased. Abiotic depletion (fossil fuels), global warming, freshwater aquatic, marine aquatic ecotoxicity, photochemical oxidation, acidification, and human toxicity values decreased. The cost of waste plastic replacement asphalt mixtures can reduce the costs of production, and laying costs.