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shows the stress-strain curve of SSC under biaxial compression. Figure 7a-c show the influences of stress ratio on the stress-strain curve, and Figure 7d-g show the effects of replacement ratio on the stress-strain curve.
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The mechanical performance of steel slag concrete (SSC) under biaxial compression is investigated by a servo-controlled static-dynamic true triaxial machine (TAWZ-5000/3000). Three replacement ratios of steel slags and four kinds of stress ratio (0.25:1, 0.5:1, 0.75:1, and 1:1) are examined in this study. According to the test results, the influenc...
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Citations
... Simultaneously, due to higher strength and better angularity of steel slag than natural sand and gravel, as well as the presence of certain hydraulic cementitious properties, the steel slag can serve as a cementitious material [3], aggregates [4][5][6][7][8], or mineral admixture [9] for new concrete after treatment. In general, owing to better angularity of steel slag aggregate (SSA), the bond performance between the aggregate particles and the cement paste is increased, leading to higher values of compressive, tensile and flexural strength of steel slag concrete (SSC) [10][11][12]. ...
Steel slag concrete (SSC) filled steel tube (SSC-FST), reusing the waste steel slag, is a new type of composite members, therefore shows advantages in sustainable use of resources. In order to investigate axial compressive performance of this new types of SSC-FST short columns with circular section, ten specimens with varied steel slag aggregate (SSA) replacement ratio and cross-sectional steel ratio () were tested. The failure patterns, load versus deformation relationship and mechanical indexes (axial capacity, elastic modulus and ductility) of the specimens were recorded and analyzed. The test results indicate that, generally, replacing natural aggregates with SSAs and improving lead to better structural performance of circular SSC-FST short column specimens. Moreover, a refined finite element (FE) model considering the initial strain of core concrete before loading was established to simulate the performance of circular SSC-FST short columns under axial compression, and the FE model was validated through experimental results from this research and the literature. Based on the verified FE model, the mechanism of axially compressed circular SSC-FST short columns was further analyzed. Finally, simplified equations were proposed to predict the axial capacity of circular SSC-FST short columns, and generally the calculated results show good agreement with the numerical/experimental results.
Steel slag is a melted by-product that mainly consists of calcium carbonate and metal oxides generated in the process of steel manufacturing. The main objectives of this study are to evaluate the effectiveness of steel slags as fine and coarse aggregates in concrete and to determine the optimum quantity of steel slag as fine and coarse aggregates to enhance the strength of concrete. Concrete cubes were cast by mixing steel slag as replacement (i.e. 0%, 10%, 25%, 50%, 75% and 100%) for fine and coarse aggregate, separately. Abrasion test, sieve analysis, water absorption and specific gravity test were conducted to determine the properties of raw materials. Unit weight, workability, compressive strength, splitting tensile strength and the possibility of corrosion were experimentally evaluated to determine the effectiveness of steel slag. It is found that 75% steel slag mixed concrete indicates improvements in compressive strength, splitting tensile strength and unit weight, respectively. Further, it was noted that steel slag aggregates were not corroded after conducting the Accelerated Corrosion Test Method (ACTM). Therefore, the use of steel slag as fine and coarse aggregates for concrete would improve the mechanical properties of concrete and reduce the adverse environmental impact.
