Many industrially produced fibers are expensive, requiring careful cost considerations prior to application. Identifying inexpensive fibers with excellent properties is therefore essential for fabricating fiber concrete. Waste steel‐fibers derived from waste tires exhibit physical properties comparable to those of industrial steel fibers. Their addition to concrete not only enhances the toughness of concrete but also facilitates the efficient recycling of waste tires. Corn crop by‐products generate a significant amount of straw; most general disposal methods, such as incineration, pollute the environment and waste resources. From the perspective of environmental protection, utilizing corn stover fibers in concrete offers good environmental and economic value. Consequently, studying the durability of concrete under harsh environments is essential. A three‐factor, three‐level orthogonal test was conducted using the stover fiber content, waste steel‐fiber content, and water–cement ratio as the main variables. The changes in the mass and strength loss rates of corn straw–waste‐steel‐fiber concrete under 25, 50, and 75 freeze–thaw cycles were investigated. The results indicated that the optimum mix ratio for frost resistance was 0.8% stover fiber admixture, 0.9% waste steel‐fiber admixture, and 0.45 water–cement ratio. Scanning electron microscopy images show that incorporating these fibers enhances concrete density through a bridging effect, strengthening its frost resistance. The established Weibull model is characterized by high accuracy, and the ability to predict long‐term damage provides insight into the application of fiber concrete in cold regions.
He et al. (Thu,) studied this question.
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