Browsing by Author "Ozbakkaloglu, T"

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    Preparation and performance evaluation of waste tuff-modified bricks for sustainable built environment: Effect of firing temperature and molding pressure
    (ELSEVIER SCI LTD) Sutcu, M; Faisal, MS; Danish, A; Erdogmus, E; Gencel, O; Ozbakkaloglu, T
    The research covers an extensive array of analyses, encompassing physical, microstructural, thermal, mechanical, and durability evaluations, to unravel the properties and characteristics of waste tuff (WT)-based bricks under different firing temperatures and molding pressures. Mechanical testing, specifically compressive strength evaluation, highlighted the significant influence of firing temperature and molding pressure, with increased strength observed at elevated temperatures and pressures. However, assessing the impact of freeze-thaw cycles, it was observed that the freeze-thaw cycles led to a minor reduction in compressive strength, particularly noticeable at lower firing temperatures. The results suggest that the most favorable firing temperature and molding pressure for minimizing linear shrinkage, decreasing apparent porosity and water absorption, achieving a desirable bulk density, optimizing thermal conductivity, and attaining satisfactory compressive strength along with better resistance to freeze-thaw cycles in WT-modified bricks, are 1100(degrees)C and 60 MPa, respectively. The promising findings of this study will help promote the production of bricks using WT, resulting in sustainable management and reduced accumulation of WT.
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    Effect of molding pressure and firing temperature on the properties of ceramics from natural zeolite
    (ELSEVIER SCI LTD) Erdogmus, E; Sutcu, M; Hossain, S; Bayram, M; Sari, A; Gencel, O; Ozbakkaloglu, T
    In recent years, there has been growing interest in eco-friendly and sustainable construction materials that reduce environmental impact while maintaining high-performance standards. The brick industry, in particular, is under pressure to develop solutions that incorporate waste and natural-based materials, reducing reliance on traditional energy-intensive manufacturing processes. In response, this study explores the fabrication of ceramic bricks using naturally occurring zeolite, which is widely available and offers promising properties for use in construction. The ceramic matrix is made with natural zeolite and water, pressed at three different pressures, and fired at three different temperatures. The study investigates the impact of varying molding pressures and firing temperatures on the microstructural and mechanical properties of ceramic bricks made with natural zeolite. XRF and XRD techniques were used to analyze the raw material's chemical composition, and TGA tests were conducted to evaluate the bricks' chemical stability. The study finds that the compressive strength of zeolite bricks molded at 15 MPa pressure and fired at 900 & DEG;C increased from 7.1 MPa to 51.2 MPa when fired at 1100 & DEG;C. Increasing the molding pressure led to a higher compressive strength of the specimens, but the effect was minimal compared to the influence of firing temperature on the compressive strength. The apparent porosity and water absorption of the bricks decreased with increasing molding pressure and firing temperature. Further, clinoptilolite, a zeolite phase, decomposes during firing and transforms into silica polymorphs, feldspathic phases, and glassy phases. As the molding pressure increased, the irregular-shaped pores in the brick specimens decreased. Moreover, the density of the bricks increased with the firing temperature due to sintering between particles in the microstructure. By investigating the impact of molding pressure and firing temperature on the microstructural and mechanical properties of these eco-friendly bricks, this study offers insight into a potential solution for sustainable construction practices. By investigating the impact of pressing pressure and firing temperature on the microstructural and mechanical properties of these eco-friendly bricks, this study demonstrated that optimizing firing temperature and pressing pressure can significantly improve the physical and mechanical properties of zeolite bricks, including bulk density, compressive strength, water absorption, and porosity, while also reducing the environmental impact of the production process. Thus, this study offers insight into a potential solution for sustainable construction practices.
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    Enhancing thermal efficiency and durability of sintered clay bricks through incorporation of polymeric waste materials
    (ELSEVIER SCI LTD) Erdogmus, E; Sutcu, M; Gencel, O; Kazmi, SMS; Munir, MJ; Velasco, PM; Ozbakkaloglu, T
    This pioneering study investigates the use of expanded polystyrene (EPS) and waste rubber tyre powder (WRTP) in sintered clay bricks for eco-friendly and cleaner buildings. Different ratios of EPS and WRTP were mixed with clay and sintered at 1000 degrees C. Advanced material characterization techniques were used to evaluate the materials, and physical, mechanical, and durability tests were performed on the bricks. The findings show that higher doses of EPS and WRTP increased the bricks' thermal efficiency and reduced their weight. Brick specimens with 0.5% EPS dosage met the weathering resistance requirements, and those with 0.5% EPS dosage and 5% WRTP dosage met the minimum compressive strength standards. The study offers valuable insights into the potential appli-cations of EPS and WRTP in producing clean and sustainable polymer waste bricks to improve brick performance and efficient waste management in the construction industry.