Akademik Veri Yönetim Sistemi
Bitlis Eren Üniversitesi Fen Bilimleri Dergisi, cilt.9, sa.2, ss.719-732, 2020 (Hakemli Dergi)
Self-consolidating concrete (SCC) that provides advantages such as high workability, low labor cost and high strength compared to conventional concrete has high performance. The aim of this study is to determine the effect of polypropylene fiber amount (0.25; 0.50; 0.75 and 1.00 kg/m3) on the workability and strength properties of fiber reinforced self-consolidating concretes. Hardened samples were subjected to temperatures of 25, 250, 500 and 750 °C. In addition, ultrasound pulse velocity measurements were performed to obtain an idea about the void structures of the samples. As a result of the study, it was observed that as the amount of polypropylene fiber increased, the fluidity of the self-consolidating concrete negatively affected, the compressive strength did not change and the tensile strength changed positively. It was determined that the concrete compressive strength and ultrasound transition velocities decreased in the temperatures of 500ºC and above. It has been observed that as the temperature increased, the polypropylene fibers melted and as a result of which, with the increase of gaps in concrete, its strength decreases. The highest loss of strength was observed at 750ºC.