Behaviour of steel-fiber reinforced concrete at elevated temperatures

Abstract

Abstract The construction sector offers a wide variety of fibers that have the potential to enhance the properties of concrete, including its strength, durability, and visual appeal. This study focuses on investigating the effects of temperature on Steel Fiber Reinforced Concrete (SFRC) and aims to present the findings of an experimental analysis. The experiment involved subjecting samples of both SFRC and regular concrete to various temperatures, ranging from room temperature to 100, 300, and 600°C. The objective was to analyse and compare the characteristics of these concretes under different temperature conditions. The SFRC utilized in the experiment consisted of hooked-end steel fibers, which were 30mm in length and 0.60mm in diameter. Both types of concrete underwent a series of tests to determine their compression, split tensile, and flexural strength. The obtained results were meticulously examined and evaluated to draw meaningful conclusions. The findings of our study revealed that the SFRC concrete not only exhibited improved strength but also demonstrated a commendable level of ductility. Additionally, this paper explores the comparison of crack patterns between the two types of concrete and discusses how these crack patterns contribute to enhancing the reliability of SFRC concrete. The experiments outcomes shed light on the potential benefits of using SFRC in construction applications, particularly in scenarios involving varying temperatures. By incorporating steel fibers, concrete can be fortified to withstand temperature fluctuations and maintain its structural integrity. This study contributes to the growing body of knowledge in the field of construction materials and provides valuable insights for engineers and practitioners seeking to optimize the performance of concrete structures.