3B YAZICIYLA BASKILANAN ÇİMENTO ESASLI HARÇLARDA KATMANLAR ARASI BAĞ DAYANIMININ İNCELENMESİ

Year 2023, , 362 - 370, 31.12.2023

Tayfun Uygunoğlu , Feyza Çetingül

https://doi.org/10.46519/ij3dptdi.1316578

Abstract

Geleneksel yöntemlerle bina üretimi yıllardır kullanılmakta olan bir yöntemken, son yıllarda üç boyutlu yazıcılarla bina üretimi giderek daha popüler hale gelmektedir. Üç boyutlu yazıcılarla üretilen yapıların en önemli özelliklerinden biri, katmanlı üretim tekniğidir. Bu çalışmada, eklemeli imalat yöntemi ile 25 katmanlı olarak baskılanan bir yapının en alt katmandan en üst katmana kadar olan katmanlar arası bağ dayanımı incelenmiştir. Üst üste gelen katmanların ağırlıklarının katmanlar arası bağ bölgelerine etkisi ve yazdırılma aşamasında oluşacak herhangi bir kesintiden ötürü oluşabilecek soğuk derz riski farklı zamanlarda bekleme gerçekleştirilerek araştırılmıştır. Öncelikle taze harcın ekstrüde edilebilirlik ve akışkanlığa karşı gösterdiği direnç özellikleri arasındaki ilişki belirlenmiştir. Priz alma süresine bakıldığında yazdırılma işleminden 90 dk sonra priz başladığı ve 250 dk geçtikten sonra da priz işleminin sona erdiği görüldü. Katmanlar arası bağ dayanımlarına bakıldığında ilk yazdırılan yani alt katmanların arasındaki bağ dayanımının üst katmanlar arasındakine göre daha fazla olduğu görülmüştür. Farklı zaman aralıklarında soğuk derz oluşturulan katmanların bağ dayanımı incelendiğinde her geçen zamanın katmanlar arası bağ dayanımını düşürdüğü gözlemlenmiştir.

Keywords

Bağ Dayanımı, Eklemeli İmalat, Soğuk Derz

Investigation of Interlayer Bond Strength in Cement-Based Mortars Printed with 3D Printer

Abstract

While traditional methods have been used for building construction for years, the use of 3D printers for building production has become increasingly popular in recent years. One of the most important features of structures produced with 3D printers is the layered manufacturing technique. In this study, the interlayer bond strength of a structure printed with an additive manufacturing method in 25 layers, from the bottom layer to the top layer, was investigated. The influence of the weights of the overlapping layers on the interlayer bond regions and the risk of cold joints that may occur due to any interruptions during the printing stage were examined by conducting waiting periods at different times. Firstly, the relationship between the extrudability and resistance properties of the fresh mortar against fluidity was determined. Looking at the setting time, it was observed that the initial setting occurred 90 minutes after the printing process and the final setting occurred after 250 minutes. When examining the interlayer bond strengths, it was found that the bond strength between the first printed layers, i.e., the lower layers, was higher than that between the upper layers. The examination of interlayer bond strengths of layers with cold joints formed at different time intervals revealed that each passing time reduced the interlayer bond strength.

Keywords

Bond strength, additive manufacturing, cold joint.

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