International Journal of Science, Engineering and TechnologyAuthors: NAVREEN, Ms. SHEELA MALIK
Abstract: The use of steel fibres into concrete has garnered considerable interest for its capacity to improve mechanical characteristics and durability at both ambient and increased temperatures. This review study methodically analyses the impact of critical steel fibre parameters—namely fibre quantity, aspect ratio, morphology, and distribution—on the efficacy of fibre-reinforced concrete (FRC). At ambient temperature, steel fibres enhance tensile strength, fracture toughness, and crack resistance by bridging microcracks and redistributing stress. The efficacy of these fibres is contingent upon optimum parameter selection, since high fibre content or inappropriate aspect ratios may result in workability challenges and uneven distribution. The report assesses current research to provide criteria for optimising FRC function while preserving structural integrity and facilitating application. At high temperatures, steel fibre-reinforced concrete shows intricate behaviour owing to thermal deterioration and the potential for spalling. This review examines the impact of fibre characteristics on residual strength, thermal conductivity, and fire resistance. Fibres with elevated melting temperatures and refined geometries may reduce strength degradation by preserving matrix integrity under thermal stress. The interaction between fibres and additives, such as polypropylene fibres, is examined to improve fire-resistant qualities. The research emphasises the need of balanced fibre doses to avert detrimental impacts on the thermal stability of concrete while enhancing its mechanical performance after exposure to fire. This analysis ultimately delineates research deficiencies and prospective avenues for enhancing steel fibre characteristics in fibre-reinforced concrete (FRC). Advanced computational modelling and experimental investigations are crucial for optimising fibre selection across varying temperature conditions. Potential options for eco-friendly building include sustainable and cost-effective fibre alternatives, such as recycled steel fibres. This study consolidates existing information to provide a complete framework for engineers and researchers to develop high-performance fibre-reinforced composites (FRC) suitable for both ambient and elevated temperature applications, therefore assuring durability and safety under harsh conditions.
DOI: http://doi.org/
