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  • Küçük Resim
    Öğe
    Cem I, Cem IIIa ve Borlu Çimento Harçları Üzerine Farklı Agresif Koşulların Etkisi
    (2014) Yaprak, Hasbi; Demir, İlhami; Kaplan, Gökhan
    Bu çalışmada deniz suyu ve amonyum nitrat gibi farklı etkilere maruz kalmış çimento harçlarının direnci araştırılmıştır. Borlu, CEM I ve CEM III/A çimentoları kullanılarak çimento harç numuneleri hazırlanmıştır. Çimento harçlarının genleşme değerlerini belirlemek için 25 x 25 x 285 mm boyutunda harç çubukları, basınç dayanımları için 40x40x160 mm boyutunda prizmalar üretilmiştir. Harç numuneleri %5'lik amonyum nitrat çözeltisi, içme ve deniz suyu olmak üzere üç farklı koşulda, 203 ºC sıcaklıkta 2, 7, 14, 28 ve 90 gün süreyle bekletilmiştir. Tüm ortam koşulları ve yaşlarda en düşük genleşme CEM III/A çimentolu harçlarda bulunmuş, hem deniz suyu ve hem de amonyum nitratlı ortamlara karşı CEM III/A çimentolu harçların daha yüksek direnç sağladığı gözlenmiştir.
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    Öğe
    Cost optimization of Colored Gypsum Composites
    (Kırıkkale Üniversitesi, 2019) Yıldızel, Sadık Alper; Kaplan, Gökhan
    Gypsum compositesas decorative and construction elements have been widely used for many buildingtypes due to their certain architectonic styles. Decorative gypsum compositesare not very durable and stable when compared to the other composites;therefore, they need to be rehabilitated in short periods. To meet theincreasing demand in the sustainability of these types of composite, manyresearches have been conducted for improving its properties with the minimumcost.  The aim of this study was to obtainthe optimum cost of the colored gypsum composites with the improved mechanicalproperties. Glass fiber reinforced, silica and expanded perlite reinforcedgypsum composites were colored with the addition of brown, yellow, black andred pigments. The mechanical properties such as compressive strength and freezethaw (F-T) resistance of the mixes were also examined. A cost optimizationanalyze were performed based on the experimental test results. Results revealedthat the usage and the cost of the color pigment added gypsum composites can beprimarily optimized.
  • Küçük Resim
    Öğe
    The Effect of Different Aggresive Condition on Mortars of Cem I, Cem II and Boron Cement
    (Gazi Univ, 2014) Yaprak, Hasbi; Demir, İlhami; Kaplan, Gökhan
    This study investigates the sea water and ammonium nitrate resistance of cement mortars when subjected to different exposure conditions. Cement mortar samples were prepared using Boron, CEM I and CEM III/A cements. Mortar specimens were stored under three different conditions: continuous curing in lime-saturated tab water, continuous exposure to sea water, and continuous exposure to 5% ammonium nitrate solution (AN), at a temperature of 20 +/- 3 degrees C, for 2, 7, 14, 28 and 90 days. Prisms with dimensions of 25x25x285 mm, to determine the expansions of the mortar samples; and another set of prisms with dimensions of 40x40x160 mm, were prepared to calculate the compressive strength of the samples. For all environmental conditions and ages, the lowest expansion is found for CEM III/A cement mortars. It has been observed that CEM III/A cement mortars have the highest resistance for both sea water and environments with ammonium nitrate.