As it is well known, the curing method directly affects many properties of cementitious composites. In previous studies, the effect of different curing conditions on the properties of the cementitious systems has been generally investigated in the period after first 24 hours after casting. However, there are not many studies in the literature related to the effects of curing conditions on the specimens kept in mold during 24 hours after casting. In this study, strength development, ultrasonic pulse velocity (UPV) and water absorption capacity of mortar specimens subjected to steam-curing at different temperatures during keeping in mold for the first 24 hours after production were compared. In this regard, all mortar specimens were exposed to curing in a steam-curing cabin at 95% constant relative humidity (RH) under 5 different temperatures such as 20, 35, 50, 65 and 80˚C for the first 24 hours after the specimens were placed into the molds. Afterwards, the specimens were removed from the molds and cured in water conformed to the standard until the testing day. In this context, the water-cement ratio, sand-binder and slump-flow value of all mortar mixtures were kept constant as 0.485, 2.75, 25±2 cm, respectively. As a result, the application of steam-curing at high temperature for the first 24 hours positively affected the 1-day compressive strength and UPV values of the mixtures, while the 3,7 and 28-day compressive strength, UPV values and the 28-day water absorption capacity of mixtures were adversely affected.
11 September 2025 in Construction and Building Materials
Son yıllarda kullanım ömrü boyunca darbe etkilerine maruz kalabilecek yapıların performanslarının artırılabilmesi üzerinde çalışmaların sayısı artış göstermiştir. Darbe dayanımı konusunda malzeme özellikleri üzerinde yapılan çalışmalar ve test yöntemleri önem kazanmaktadır. Malzeme açısından darbe dayanımını artırabilecek bileşenler, katkılar ve oranları alanında yapılan çalışmaların yanısıra uygulanan yöntemler arasında en çok kullanılan test yöntemi olarak ağırlık düşürme deneyi dikkat çekmektedir. Çalışmamızda darbe dayanımı ve tespiti konularında yapılan çalışmalar özetlenerek sonra yapılacak çalışmalar için önerilerde bulunulmuştur.
1 July 2023 in Journal of Materials in Civil Engineering