Yazar "Temiz, Huseyin" seçeneğine göre listele

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    Improving performance of bituminous pavement layers with vermiculite, perlite, lime and calcite additives
    (Springer Int Publ Ag, 2022) Temiz, Huseyin; Kantarci, Fatih; Keklik, Mesut
    The bearing resistance of asphalt pavements decreases due to the high temperature and long loading times and many distortions occur with tracks. Mineral additives are used to prevent the formation of wheel marks and other deformations in bituminous hot mixtures. Some of the additives are used to improve the blend properties by modifying the bitumen and some are directly involved in the admixture to enhance the engineering characteristics of the pavement layer. In this study, vermiculite, perlite, lime and calcite minerals were added directly to the mixture at the ratio of 0.5%, 1%, 1.5%, 2% and 2.5% of aggregate weight. Bitumen content, porosity, stability and flow values of the samples were determined by Marshall method. The values obtained from doped samples were compared with the reference sample. As a result of experimental study, it was revealed that vermiculite, perlite, lime and calcite mineral additives increased the durability of the asphalt mixtures and these additives may obstruct the wheel tracks on the surface.
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    Influence of blast-furnace slag on behaviour of dolomite used as a raw material of MgO-type expansive agent
    (Elsevier Sci Ltd, 2015) Temiz, Huseyin; Kantarci, Fatih; Inceer, M. Emin
    The content of MgO in cement is restricted to less than 5% (by weight) because of its expansive character. However, the cement, called dam cement, containing MgO more than 5% is used in both research activities and industrial applications. Turkey is rich in dolomite reserves and dolomite is abundantly found in several regions of the country. In this study, influence of blast-furnace slag (BFS) on expansion properties of dolomite was explored. Portland Cement (CEM I 42.5R) was replaced with dolomite up to 40% and blast-furnace slag up to 20%. Hydration heat, setting times, soundness and micro-structures of paste samples and compressive strength and length change of mortar samples were measured. As a result of experimental studies, dolomite used instead of cement caused up to 1.75 mm expansion. The results are in accordance with the values indicated in the standards. As a conclusion, it is possible to use blast-furnace slag in balancing the expansion properties of dolomite. (C) 2015 Elsevier Ltd. All rights reserved.
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    Investigation of durability of CEM II B-M mortars and concrete with limestone powder, calcite powder and fly ash
    (Elsevier Sci Ltd, 2014) Temiz, Huseyin; Kantarci, Fatih
    In this study, a new binding material obtained by mixing limestone, calcite powders and fly ash in various ratios were used instead of mineral admixture in CEM II/B-M. Mechanical and physical properties of the samples were tested. Results showed that an increase which agreed with the standard requirements was observed in the setting times and volume expansion of paste samples with increasing amount of limestone and calcite powder. Also, the compressive strength of mortar samples decreased with increasing the amount of limestone and calcite powder. Compressive strength of samples with fly ash had a significant increase after 28 days. When samples with limestone and calcite powder were immersed in chemical solutions, compressive strength of samples decreased and weight loss increased. (C) 2014 Elsevier Ltd. All rights reserved.