SIMULASI DURABILITAS BETON NORMAL TERHADAP PENGARUH SUHU TINGGI AKIBAT PROSES PEMBAKARAN

Abstract

Concrete is one of the most commonly used construction materials due to its high compressive strength and durability under various environmental conditions. However, exposure to elevated temperatures, such as during fire incidents, can significantly reduce its mechanical performance. This study investigates the effect of heating duration on the mechanical properties of concrete through compressive strength, flexural strength, and hammer test analyses. Three concrete grades, f’c 25 MPa, 30 MPa, and 35 MPa, were used to evaluate the influence of initial strength on mechanical degradation after high-temperature exposure. The specimens were prepared following standard procedures and tested at 28 days of curing. Heating was carried out in a furnace for 1, 2, and 3 hours, followed by cooling before testing. The results indicated a substantial decrease in compressive strength with longer heating durations, with the highest reduction of 54.22% observed in 35 MPa after 180 minutes. Similarly, flexural strength decreased most significantly in 35 MPa by 64.58%, while 25 MPa showed the smallest decline of 10.67%. Hammer test results revealed that 30 MPa and 35 MPa concretes exhibited rebound values higher than their design strengths. Overall, the duration of heating significantly affects the mechanical strength and stability of concrete.