Melt extract stainless steel fiber improves the fire resistance of shotcrete by providing enhanced structural integrity and heat resistance. The fibers act as reinforcement, reducing cracking and spalling during high temperatures. This helps to maintain the structural stability of the shotcrete, preventing it from collapsing or disintegrating under fire conditions. Additionally, the stainless steel fibers create a barrier that slows down heat transfer, reducing the spread of fire within the shotcrete. Overall, the inclusion of melt extract stainless steel fiber significantly enhances the fire resistance of shotcrete, making it a more reliable and durable material for fire protection applications.