PET Lif Takviyeli Farklı Puzolanik İkameli Çimento Harçlarının Mekanik Özellikleri

Bu çalışmada, çimento harçlarında, Uçucu kül (UK), Yüksek Fırın Cürufu (YFC) ve Polietilen tereftalat (PET) lif takviyesi kullanarak mekanik ve fiziksel özellikler incelenmiştir. Bu çalışmanın ilk aşamasında PET lif takviyesinin sertleşmiş harç özeliklerine etkileri incelenmiştir. Bunun için ilk olarak bağlayıcı oran ağırlığının %0.5 %1, %1.5 %2 ve %3 PET lif ilave edilmiş ve en yüksek dayanımını veren lif takviyesi %1 olarak belirlenmiştir. %1 PET lif ilave edildiğinde eğilme dayanımının %25,79 oranında arttığı gözlemlenmiştir. Daha sonra %1 PET lif sabit tutularak çimento içerisine ağırlıkça %0, %5, %10, %15, %20, %25 ve %30 UK ve YFC ikame edilerek kompozit numuneler üretilmiştir. Yapılan çalışma sonucunda, en yüksek eğilme dayanımının %1 PET lif takviyeli, %10 UK ve YFC ikameli çimento harç karışımlarında elde edildiği görülmüştür. Harç numuneleri üzerinde, eğilme, basınç dayanımı ve ultrasonik ses hızı ölçümü deneyleri gerçekleştirilmiştir.

Mechanical Properties of PET Fiber Reinforced Cement Mortars with Different Pozzolanic Substitutes

In this study, mechanical and physical properties of cement mortars were investigated by using fiber reinforcement of Fly ash (FA), Blast Furnace Slag (BFS) and Polyethylene terephthalate (PET). In the first stage of this study, the effects of PET fiber reinforcement on the cured mortar properties were investigated. For this, 0.5% 1%, 1.5% 2% and 3% PET fiber were added by weight of the binder ratio and the fiber reinforcement giving the highest strength was determined as 1%. It was observed that flexural strength increased by 25.79% when 1% PET fiber was added. Then, by keeping 1% PET fiber constant, composite samples were produced by substituting 0%, 5%, 10%, 15%, 20%, 25% and 30% FA and BFS into cement by weight. At the end of the study; It was observed that the highest flexural strength was 1% PET fiber reinforced, 10% FA and BFS substituted cement mortar mixtures. Flexural, compressive strength and ultrasonic pulse velocity measurements were carried out on the mortar samples.

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