Due to the scarcity of natural sources of stone in Bangladesh, crushed brick chips are predominantly used as coarse aggregate in concrete. The production process of bricks is not environment-friendly. In this study, the potential of waste induction furnace slag (IFS) as a replacement of brick aggregate was investigated. The effects of replacing crushed brick aggregate by IFS aggregate on properties of concrete were studied, for varying mix design parameters including W/C ratio (0.45 and 0.50), cement content (340, 375, and 400 kg/m³), and fine aggregate to total aggregate volume ratio (0.40, 0.44, and 0.48). Concrete mechanical properties were assessed using conventional means and ultrasonic pulse velocity through concrete was measured. Aggregate-matrix interfaces were examined using a scanning electron microscope (SEM). Results indicate that any replacement of brick aggregate by IFS enhances concrete mechanical performance and workability compared to 100% brick aggregate concrete, while the best mechanical performance is achieved at 50% replacement. Relationships between different hardened-state properties of concrete have been proposed for 0%, 50%, and 100% replacements. A 35% reduction in the CO₂ footprint of concrete can be achieved by fully replacing brick aggregate with IFS, with at least a 30% reduction in cost.

由于孟加拉国天然石材资源稀缺，碎砖片主要用作混凝土中的粗骨料。砖的生产过程不环保。在这项研究中，对感应炉废渣 (IFS) 作为砖骨料替代品的潜力进行了调查。研究了用 IFS 骨料代替碎砖骨料对混凝土性能的影响，不同的配合比设计参数包括水灰比（0.45 和 0.50）、水泥含量（340、375 和 400 kg/m ³)，以及细骨料与总骨料体积比（0.40、0.44 和 0.48）。使用常规方法评估混凝土机械性能并测量通过混凝土的超声波脉冲速度。使用扫描电子显微镜 (SEM) 检查骨料-基质界面。结果表明，与 100% 的砖骨料混凝土相比，IFS 对砖骨料的任何替代都可以提高混凝土的机械性能和和易性，而在 50% 的替代率下达到最佳机械性能。已经提出了 0%、50% 和 100% 置换的混凝土不同硬化状态特性之间的关系。通过用 IFS 完全替代砖骨料，混凝土的 CO ₂足迹可以减少 35% ，成本至少降低 30%。