Kemalettin Yilmaz

Jeopolimer harçlarda dayanım, kür sıcaklığı ve boşluk oranı ilişkisinin varyans analizi ile incelenmesi

Cimento, insanoglunun son ikiyuz yildir yaygin olarak kullandigi en onemli yapi malzemelerinden birisidir. Cimentonun uretimi sirasindaki yuksek enerji ihtiyaci ve aciga cikan CO 2 gazinin atmosfere vermis oldugu zararli etki, son yillarda en cok uzerinde dusunulen konulardan birisidir. Bu sebeple cimentoya alternatif baglayici yapi malzemesi uretimi icin birtakim calismalar yapilmaktadir. Metakaolin, yuksek firin curufu ve ucucu kul gibi malzemelerin cesitli kimyasal aktivatorler ile karistirilarak aktive edilmesi sonucu cimento benzeri baglayici yapi malzemesi uretmek mumkun olabilmektedir. Bu calismada ucucu kulun, sodyum hidroksit (NaOH) ve sodyum silikat (Na 2 SiO 3 ) ile aktive edilmesi sonucu elde edilen jeopolimer harclarin cesitli yas gruplarindaki dayanimlari ile kur sicakligi ve bosluk orani iliskisinin varyans analizi arastirilmistir. Calismada Sosyal Bilimler Istatistik Programi (SPSS) kullanilmistir.

Farklı Kompozisyonlardaki Zararlı Ortamlara Maruz Kalan Betonlar İçin Uygun Çimento Tipinin Belirlenmesi

It is emerged to use the materials optimum and efficiently due to shortage of material arising from increasing demands and developed and improved technology. Because of this, it is necessity to understand throughly and analyze the internal structure and mechanical behaviour of cement which one of the most important component of concrete. Water, carbon dioxide, oxygen, sulfate, acid and chloride infiltrate into concrete and caused various types of chemical reactions. Therefore, the concrete has exposed to some chemical and physical factors caused durability problems within the concrete. In this study, CEM I 42.5 R, CEM II/A-P 42.5 R, CEM IV/A-P 32.5 R and SDC 42.5 R types of cements were used and two types of concrete (C20/25 and C30/37) were produced and the concretes were exposed to two various hazardous chemical environments. Compressive strength test was performed on the specimens at 28 d and 180 d. However, it was aimed to determine optimum cement type of concrete exposed to various chemical hazardous environments at Ambarli Advanced Biological Wastewater Treatment Plant.