Polimer esaslı termoplastik malzeme grubunda yer alan poliamid, yüksekmukavemet ve yüksek sıcaklıklara dayanma özelliklerinden dolayı endüstrininfarklı alanlarında yaygın olarak kullanılmaktadır. Poliamid (PA) malzemelerinmonomer yapısına bağlı olarak nem alma davranışları malzemenin mekaniközelliklerini önemli ölçüde etkilemektedir. Endüstrinin farklı alanlarında yarımamul olarak üretilen ürünlerin, üretim şekli ve kullanım alanlarına bağlı olarakkaynak yöntemi ile birleştirilmesi gerekmektedir. Bu çalışmada, PA6 ve cam elyafkatkılı türevlerinden üretilmiş olan numuneler sıcak plaka kaynak yöntemi ilebirleştirilmiştir. Nem alma davranışının kaynak mukavemetine etkisini araştırmakamacıyla, numuneler -20 oC ile 60 oC sıcaklık aralığında 16 saat bekletilerek yapayolarak şartlandırılmıştır. Kaynaklı numunelerde, şartlandırma sıcaklıklarınınartması ile PA6 malzemede nem alma oranının arttığı, mekanik mukavemetdeğerlerinin azaldığı ve yüzde uzama değerlerinin ise artığı gözlenmiştir. Cam elyafkatkılı numunelerde ise nem alma oranında önemli bir değişiklik olmamıştır.Şartlandırma sonrasında, en yüksek kaynak mukavemeti PA6 malzemede 0 oC’ de34 MPa, PA6 GF15’te -10 oC’de 38MPa ve PA6 GF30’da ise -20 oC’de 41MPa olarakölçülmüştür.

Polyamide, which belongs to the group of polymer-based thermoplastic materials, is widely used in different fields of industry due to its high strength and high temperature resistance properties. Depending on the monomer structure of polyamide (PA) materials, the dehumidification behavior significantly affects the mechanical properties of polyamide-based materials. Semi-finished products manufactured for different areas of the industry should be joined by means of welding methods depending on the production methods and usage areas. In this study, samples produced from PA6 and glass fiber reinforced PA6 were combined by hot plate welding method. In order to investigate the effect of dehumidification behavior on the welding strength, the samples were artificially conditioned at a temperature range of -20 oC to 60 oC for 16 hours. In welded samples, it was observed that the dehumidification rate of PA6 material increased, mechanical strength values decreased and percent elongation values increased with the increase of conditioning temperatures. There was no significant change in the rate of dehumidification for glass-fiber reinforced samples. After conditioning, the highest weld strength was measured as 34 MPa at 0 oC for PA6, 38MPa at -10 oC for PA6 GF15 and 41MPa at -20 oC for PA6 GF30.

Shotcrete has many application areas such as repair/reinforcement of buildings damaged by an earthquake as well as metro, dam, bridge, tunnel construction and repair, slope stabilization so it's important to investigate the effects of certain factors, including mixture design, application, machinery and equipment, rebound on cost. The cost of shotcrete is affected by several factors such as the application surface, material quality, rebound, workmanship, transport, etc. Therefore, it is not possible to determine the exact cost. The aim of this study is to calculate the approximate cost of shotcrete for different applications and purposes. The software developed to evaluate the effects of the parameters affecting the cost of shotcrete was developed using C# programming language on Microsoft Visual Studio platform. Data obtained by analyzing on the software were compared with a sample study. As a result, it was determined that the tests performed in the developed software were in agreement with the sample.