Yazar "Tanyildizi, Mehmet Mahmut" seçeneğine göre listele

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    Analysis of fibre reinforced concrete for road pavements on very weak soils
    (Croatian Soc Civil Engineers-Hsgi, 2023) Geckil, Tacettin; Tanyildizi, Mehmet Mahmut; Ince, Ceren Beyza
    In this paper, the effects of steel fibre usage on concrete pavement thickness and cost were investigated. Prepared fibrous concrete specimens were subjected to physical and mechanical tests. From the experiments, it was determined that as the steel fibre ratio increased, the workability and compressive strength of the specimens decreased, but the flexural and splitting tensile strengths increased. In addition, according to calculations made using the AASHTO 1993 design method, the concrete pavement thickness decreased in the range of 4.35 to 18.66 % with an increase in steel fibre, but the pavement cost increased by 56.50 to 74.07 %.
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    Physical, rheological and microstructural properties of waste LDPE and TEOA modified bitumens
    (Taylor & Francis Ltd, 2022) Geckil, Tacettin; Ince, Ceren Beyza; Tanyildizi, Mehmet Mahmut
    In this study, low density polyethylene (LDPE) and triethanolamine (TEOA) were used together by applying a different process in order to obtain a good chemical interaction between LDPE and bitumen in bitumen modification and the effects of this interaction on the performance properties of bitumen were investigated. For this purpose, modified bitumens were obtained by adding 2.5 wt% TEOA and different proportions (1, 2, 3, 4, and 5 wt%) of waste LDPE to pure B 70/100 bitumen. Physical and rheological properties of pure and modified bitumens were determined by conventional and Superpave tests, and microstructural characterizations were determined by SEM, XRD, and FT-IR spectroscopy tests. As a result of the tests, it was observed that phase separation disappeared by forming a good chemical interaction between bitumen and LDPE. In addition, it has been determined that with the addition of LDPE, the binders come to a hard consistency and their temperature sensitivity decreases, but they retain their elasticity properties. It was determined that especially 4% LDPE added binders showed a significant increase in permanent deformation, fatigue and thermal crack resistance, which are performance properties at high, intermediate, and low temperatures, respectively.