Abstract
Waste steel slag is a recycled industrial solid waste and is sometimes used as backfills, but the dynamic shear properties of waste steel slag have not been researched at present. To understand the dynamic shear properties of waste steel slag, the resonance column tests were carried out to investigate the dynamic shear modulus and damping ratio of the steel slag considering the effect of the relative density of steel slag and confining pressure. The maximum dynamic shear modulus was discussed, and the dynamic model of the steel slag was constructed by the Hardin–Drnevich model. The regression analysis of the normalized dynamic shear modulus ratio and damping ratio of the steel slag showed that the dynamic model was very fit for the steel slag. The comparisons of the dynamic shear properties of the steel slag with those of Nanjing fine sand and Fujian standard sand showed that the steel slag had similar dynamic shear resistance to Fujian standard sand and had potential to become a substitute for sand in the practical geotechnical engineering in the future.
Highlights
With the rapid development of society, there are more and more industrial solid wastes, which include some recycled resources such as waste steel slag
Recycled study on industrial solid wastes in civil engineering has recently become a new trend in the world, and the application of the four kinds of industrial wastes in Britain in asphalt pavement was summed up including waste slag [1]
E ect of Relative Density. e relationships between the dynamic shear modulus (G) and the shear strain (c) of the steel slag with di erent relative densities are shown in Figure 5 when the con ning pressures (σ) were, respectively, 100 kPa, 200 kPa, and 300 kPa. e G-c curves of the steel slag accorded with hyperbolic characteristics
Summary
With the rapid development of society, there are more and more industrial solid wastes, which include some recycled resources such as waste steel slag. Main influence factors of the expansion and powder of steel slag included maximum particle size, porosity, and free calcium oxide content [5] Steel slag was mixed into graded crushed stone subbase to make the foundation form a good early strength and higher shear resistance [6]. E deformation and strength characteristics of lightweight soil mixed with waste steel slag and foamed plastics were studied by considering the influence of the steel slag mixing ratio and curing age [8]. Stainless steel reducing slag (SSRS) in production of the soil-based controlled low-strength material (CLSM) was used as a cement substitute. According to the above literature review, at present, the dynamic shear resistance characteristics of waste steel slag as a geo-backfill material have not been studied. The dynamic shear modulus and damping ratio of waste steel slag would be investigated by resonance column tests
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