Most of SS is landfilled, which represents a significant economic loss and a waste of valuable land space. Porosity character of steel slag is obvious under low confining pressure and dynamic loads. Slag - Usage • Slag aggregates are approved for a number of uses although there are restrictions. This research was financially supported by the Natural Science Foundation of Jiangsu Province (Grant no. E-mail: Associate Professor, Dept. The 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]. The linear fitting equation is shown in equation (5). Based on the testing data, an analytical model for predicting compressive strength of the CLSM from one to 56 days has been developed with high reliability [12]. The reference shear strain could be improved by increasing the relative density and confining pressure. The large amount of Industrial wastes as increased year by year and disposal becomes a very serious problem. The dynamic shear characteristics of the steel slag were initially studied by resonance column tests, and the following conclusions were obtained:(1)The dynamic shear modulus of the steel slag decreased with the increase of shear strain, and the damping ratio increased with the increase of shear strain. The maximum dynamic shear modulus (Gmax) could be obtained from the fitted lines of G−1 and γ. The grain size distribution of the waste steel slag is shown in Figure 2. Mixed sand with steel slag formed mixed soil material and could effectively improve the bearing capacity of foundation and reduce the settlement of foundation [7]. Keywords: industrial waste, steel slag, sludge, geotechnical parameters, shear strength. After compaction, the strength index even reached concrete strength [4]. E-mail: © 2016 American Society of Civil Engineers, Journal of Materials in Civil Engineering, Engineering Properties of Silty Soil Stabilized with Lime and Rice Husk Ash and Reinforced with Waste Plastic Fiber, Stabilizing Dispersive Soil Using Brown Coal Fly Ash and Hydrated Lime, Geo-Chicago 2016: Sustainable Geoenvironmental Systems, Soil Stabilization Using Rice Husk Ash and Natural Lime as an Alternative to Cutting and Filling in Road Construction, Journal of Construction Engineering and Management, Influence of Lime on Alluvial Soil Strengthened with Pond Ash and Rice Husk Ash for Construction of Subgrade of Road, Addition of Lime and Fly Ash to Improve Highway Subgrade Soils, https://doi.org/10.1061/(ASCE)MT.1943-5533.0001547, © 1996–2021, American Society of Civil Engineers. Figure 13 is the comparison of the maximum dynamic shear modulus for three materials. Dynamic Shear Properties of Recycled Waste Steel Slag Used as a Geo-Backfill Material, Professor (Ph D), School of Civil and Architectural Engineering, Jiangsu University of Science and Technology, No. The gradation characteristics of the steel slag are as follows: d60 = 1.0 mm, d30 = 0.47 mm, and d10 = 0.12 mm; the coefficient of uniformity (Cu) was 8.3, and the coefficient of curvature was 1.8 (Cc). As could be seen from Table 4, with the increase of the relative density and confining pressure, the maximum dynamic shear modulus of the steel slag increased. Wang, J. Li, and B.-h. Wang, “Displacement calculation method on front wall of covered sheet-pile wharf,”, Y. Chuancheng, C. Wenxia, and D. Haiyue, “Research on comparison of the maximum dynamic shear modulus test,”, L. Y. Wang, X. T. Cao, Q. Wang, and B. H. Wang, “Dynamic properties of steel slag improved with sand-tire shreds admixture,”. Slag “Slag is a by-product of steel making. The waste slag was applied into the underground deep wall method [13]. Its alkaline property neutralizes soil acidity. Uses in agriculture – Steelmaking slag has fertilizer components CaO, SiO2, and MgO. Addition of SS to the soil increased the dry density and decreased the optimum moisture content as well as increased the unconfined compressive strength. The discarded steel slag is shown in Figure 1. X. M. Yuan and J. The data used to support the findings of this study are available from the corresponding author upon request. The specific test parameters are shown in Table 2. Property Clay soil Steel slag Specific gravity 2.71 FA: 3.2 CA: 3.1 Liquid limit, % 51.9 Non-plastic Plastic limit, % 27.9 Non-plastic It should be less than 30%. Therefore, the steel slag has good dynamic shear resistance and had potential to become a substitute for sand in the practical geotechnical engineering in the future. (2)The greater the relative density of the steel slag was, the larger the dynamic shear modulus of the steel slag was. The test range of shear strain in the resonant column equipment was generally in a range of 10−4∼10−6. The linear fitting effect was perfect between the reference shear strain and confining pressures. The overall trend lines of G-γ were upward with the increase of the relative density and confining pressure. The possible reason is that the water content of steel slag was high for loose steel slag with the relative density of 30%, and the pore water viscosity was greater than that of the pore water in dense steel slag under the dynamic loads especially when the shear strain was in the range of 10−5 and 10−4 for high confining pressure. The relationship between the dynamic shear modulus and the shear strain was expressed as equation (3) [32], and the relationship between the damping ratio and the shear strain was expressed as equation (4):where , , and represent the dynamic shear strain, reference shear strain, maximum shear modulus, and maximum damping ratio, respectively. A mixture of steel slag and lime soil was formed and had good frost resistance and corrosion resistance. Steel slag is a byproduct of iron and steel production by the metallurgical industries. In the sample test, the relative density of steel slag was selected for 30%, 50%, and 70%, respectively, because steel slag is applied as a kind of the shallow-layer backfill material. The regression analysis of the normalized dynamic shear modulus ratio and damping ratio was performed very well according to the Hardin–Drnevich model. Slag-based silicate fertilizer has been widely used to improve soil silicon- availability and crop productivity. The bulk density of the waste steel slag was approximately 2.2 g/cm3. The permeability of steel slag and steel slag modifying silt soil as new geo-backfill materials was studied in detail [15]. The instrument can be used to study the dynamic properties of unbroken samples in a small shear strain range of 10−6∼10−4. From: Carbon Dioxide Sequestration in Cementitious Construction Materials, 2018 2016-JZ-020), and Postgraduate Research and Practice Innovation Program of Jiangsu Province (Grant no. In order to study the relationship between the relative density of steel slag and its dynamic shear characteristics, the resonant column tests of the steel slag samples with different relative densities were carried out. We evaluate the effect of adding slag to soil on its mechanical and reactive properties when compacted. Z. Wang, Y. G. Wu et al., “Experimental research and application of Yubei steel slag pile composite foundation,”, C. Yan, S. Y. Liu, and Y. F. Deng, “Experimental research for the application of mining waste in the trench cutting remixing deep wall method,”, M. Z. Hu, “The application of steel slag in Lou-Lian highway,”, W. Li, H. L. Wang, Li F. Li et al., “Mechanical property tests of mixed soil materials of waste steel slag and sand,”, L. Y. Wang, P. Gao, and G. X. Chen, “Experimental studies on the compressive deformation and strength characteristics of new mixed lightweight sand blended with waste steel slag,”, S. Shulin, J. Tang, and Q. H. Zheng, “Experimental study of expansive soil improved with granulated blast furnace slag (GBFS),”, A. E. brahim and A. E.-M. Behiry, “Evaluation of steel slag and crushed limestone mixtures as subbase material in flexible pavement,”, Y. Laxmikant and R. K. Tripathi, “Effect of the length of geogrid layers in the bearing capacity ratio of geogrid reinforced granular fill-soft subgrade soil system,”, Y.-N. Sheen, L.-J. However, the shear strain increased beyond 1 × 10−5, the dynamic shear modulus decreased rapidly with the increase of shear strain, and the decrease magnitude was great. Therefore, the water content in the test sample was set as 6%. Commonly murrum soil has been used for construction of all categories of roads in our country. The stiffness of stabilized soil increases to 58–78% as compared to clay soil. Slag is commonly used to make cement. Owing to its high Si content, the use of slag as silicate fertilizer is gaining demand. Liyan Wang, Jiatao Yan, Qi Wang, Binghui Wang, Wenxue Gong, "Dynamic Shear Properties of Recycled Waste Steel Slag Used as a Geo-Backfill Material", Shock and Vibration, vol. Especially when the confining pressure reached 300 kPa, the maximum dynamic shear modulus of the steel slag was in the numerical range of those of Fujian standard sand. 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