Quantifying influence of single particle shape and loading rate on mechanical properties of steel slag

Abstract

As a typical solid waste from the iron and steel, the mechanical properties of steel slag are regarded as the core basis for realizing its resource recycling. To explore the influence of shape and external loading speed on the crushing characteristics of steel slag, single particle crushing tests were carried out. The research focuses on the correlation between parameters such as the load–displacement relationship of single particles, crushing mode, crushing energy, and Weibull modulus, as well as external loading rate and quantified morphological parameters. The results show that the single particle crushing modes of steel slag mainly consist of three modes: through-splitting, complete fragmentation and local cutting; Compared with natural aggregates or recycled materials, steel slag particles are found to potentially exhibit higher compressive strength and the increase in loading rate further accelerates the occurrence of particle crushing behavior; Significant impacts on the crushing mode and characteristic stress of steel slag particles are exerted by their shape differences, and the energy release mode is jointly regulated by shape and loading rate. This research provides theoretical guidance and technical support for the diversified utilization of steel slag single particles, a new type of solid waste resource.

Keywords

steel slag / single particle crushing / crushing strength / Weibull distribution

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Central South University