Recycling of materials has become a major interest. Recently, the amount of slag deposited in the storage yard adds up to millions of tons/year leading to the occupation of farmland and serious pollution to the environment. Electric Arc Furnace slag (EAFS) is made at 1500–1650 °C having a honey comp shape with high porosity so it is expected to be good at fire resistance. Using EAFS as a partial replacement of the natural aggregate can be considered a good alternative for sustainable construction because its cost is very low. Although the existence of a high void ratio, this slag showed high compressive strength when using it as a partial replacement of natural aggregate in conventional concrete due to its good strength characteristics.

This study investigates the behavior of using EAFS as a partial or fully coarse aggregate replacement by weight with different percentages of 0%, 15%, 30%, 50%, and 100% in concrete when subjected to elevated temperatures. Six groups of concrete mixes were prepared using various replacement percentages of slag exposed to different temperatures of 400 °C, 600 °C, and 800 °C for different durations of 1hr, 1.5hr, and 2hr. Evaluation tests of EAFS performance as a partial or full replacement of natural aggregate in concrete were compressive strength, tensile strength, and bond strength. The steel slag concrete mixes showed weak workability lower than the control mix. A systematic increase of almost up to 21.7% in compressive strength, and 66.2% in tensile strength with increasing the percentage of EAFS replacement to 50%.

The experimental results showed that EAFS enhances the concrete properties and the fire resistance as confirmed by Thermal Gravimetric Analysis (TGA). The high void ratio and the slag components are the causes of this fire resistance enhancement result in improving the durability of concrete.

材料的回收已成为人们的主要兴趣。近期，堆场堆存矿渣量达数百万吨/年，占用农田，严重污染环境。电弧炉炉渣 (EAFS) 在 1500–1650 °C 下制成，具有高孔隙率的蜂窝状形状，因此预计具有良好的耐火性。使用 EAFS 作为天然骨料的部分替代品可以被认为是可持续建筑的一个很好的选择，因为它的成本非常低。尽管存在高空隙率，但由于其良好的强度特性，这种渣在用作常规混凝土中天然骨料的部分替代品时显示出高抗压强度。

本研究调查了使用 EAFS 作为部分或完全粗骨料替代重量的行为，混凝土中的 0%、15%、30%、50% 和 100% 的不同百分比在承受高温时。使用暴露于 400°C、600°C 和 800°C 的不同温度并持续 1 小时、1.5 小时和 2 小时的不同替代百分比的矿渣制备六组混凝土混合物。EAFS 性能作为混凝土中天然骨料的部分或全部替代品的评估测试是抗压强度、抗拉强度和粘结强度。钢渣混凝土混合料的和易性弱于对照混合料。随着 EAFS 替代品的比例增加到 50%，抗压强度和抗拉强度系统性提高了近 21.7%，抗拉强度提高了 66.2%。

实验结果表明，EAFS 增强了混凝土的性能和耐火性，正如热重分析 (TGA) 所证实的那样。高孔隙率和炉渣成分是这种增强耐火性的原因，从而提高了混凝土的耐久性。