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    Effect of Boron Wastes on the Engineering Properties of Perlite Based Brick
    (2020) Çimen, Selçuk; Çağlar, Hakan; Çağlar, Arzu; Can, Ömer
    The industrial development brings about the formation of wastes. These wastes can be reused in other sectors as byproducts to mitigate the harmful effects they have on the environment. One of the areas where these wastes are evaluated is in brick manufacturing for the construction sector. This study focuses on the use of industrial boron waste to improve physical and mechanical properties of bricks locally produced using perlite. In this study brick samples were produced by using boron wastes at ratios of 5%, 10%, 15% and 20% while keeping perlite materials constant at 5%. The samples were heated at 900 ° C. Physical and mechanical tests were performed on brick samples obtained after heating in the oven. Specific gravity, water-saturated unit volume, porosity and freezing-dissolution tests were performed to determine physical properties. In order to determine the mechanical properties, compressive strength and bending tensile strength tests were conducted to the brick samples. As a result, it is observed that the usage of perlite and boron wastes as additives in the production of bricks has desirable effects on improving physical and mechanical properties of bricks.
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    Improving of Lightweight Concrete Properties Produced with Pumice Aggregate of Nevşehir Region with Fly Ash Substitution
    (2021) Kale, Mehmet Oğuzhan; Çağlar, Hakan; Çağlar, Arzu; Apay, Ahmet Celal; Çimen, Selçuk
    In this study, it was aimed to determine the effects of industrial waste fly ash substitution on physical and mechanical properties of lightweight concrete. In this respect, lightweight concrete samples were produced by the use of fly ash as a cement replacement material in different proportions (1%, 3% and 5%). In lightweight concrete production, the Nevşehir region acidic pumice has been used as aggregate. The physical and mechanical properties of these lightweight concrete samples were investigated and microstructural analysis was carried out. To determine the physical differences, dry unit volume weight, capillary water absorption, porosity, compactness and freezethaw experiments were conducted. For the determination of mechanical properties, tensile splitting strength and compressive strength tests were applied. SEM images have been interpreted to examine the structural differences occurring within the material. As a result of the study, it was determined that the physical and mechanical properties of the ligtweight concrete were improved with the increase in the amount of fly ash. The best results were obtained from sample with 5% fly ash substitution. The use of industrial waste in a large sector such as construction, which adversely affects the ecological balance, will be an opportunity to dispose of waste.