Bayburt Üniversitesi Fen Bilimleri Dergisi

Yazarlar: Nurullah ÖKSÜZER, Ozgur ANIL, Alper ALDEMİR, Mustafa ŞAHMARAN

Konular:İnşaat Mühendisliği

Anahtar Kelimeler:Shear span to depth ratio,Large Scale,Coarse Aggragates,Nano Materials

Özet: Small scale studies in the laboratories of high performance concretes with hybrid fiber additives are quite common. However, large-scale studies on these special concretes are very difficult to do research due to reasons such as cost and production difficulty. Studies on these concretes with different shear span/effective depth (a / d) ratios have not yet become widespread. In order for these concretes to be used structurally, the cost reduction should be considered as a priority. This study started with the use of coarse aggregate (Dmax 11.2mm) in order to reduce the cost of these special concretes. In addition, two different ratios of fly ash (0.20-0.70), two different ratios of aggregate (1.0-2.0) and 3 different fiber types (Steel, Nylon and PVA) with different lengths were also evaluated within the scope of the study. Two different nano materials were added to a series selected among the mixtures and participated in the performance evaluation. The reinforced concrete mixture, which is widely used in structural productions today, was produced within the scope of the study in order to make a comparison. Beams of 100x150x1000 mm were produced from the mixtures and four-point bending loadings were applied at four different a/d (0.67, 1.11, 2.22 and 2.96) ratios. At the end of 28 days, the load-displacement curves and fracture patterns of the beams obtained from the experiments were examined and evaluated.

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