Analisis Kondisi Beton Campuran Serat DRAMYX pada Efek Peningkatan Suhu Thermal Awal

Concrete, as one of the main materials in construction, is known for its fire resistance. However, sudden exposure to high temperatures, such as during a fire, can cause a significant decline in concrete quality. Common damages include thermal cracking, surface spalling, This study aims to evaluate the performance of Dramyx fiber-reinforced concrete when exposed to initial thermal temperatures and how the cooling process of the concrete is affected. The study used 20 MPa concrete with the addition of 0.5% Dramyx fibers. Samples were tested at temperatures of 90°C, 150°C, and 210°C with heating durations of 2, 4, and 6 hours. Testing included compressive strength, tensile strength, and flexural strength. The tests showed that normal concrete experienced a decrease in compressive, tensile, and flexural strength after heating, especially at high temperatures and prolonged heating durations. Fiber-reinforced concrete could maintain or improve compressive and tensile strength, while normal concrete experienced a decrease in quality to 17.6 MPa. PSTA concrete also decreased to 18.2 MPa, while PSTR remained superior with a quality of 21.2 MPa, becoming the most stable and strongest at the end of heating.