Effects of steel dust waste incorporation on the mechanical properties of concrete

Najmadeen Mohammed Saeed, Barham Haidar Ali, Sarchil Faisal Khidir, Ahmed Salman Kareem, Brusk Sasan Ahmed, Ibrahim Zahir Khalid, Hogr Zainaddeen Hassan
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Abstract

Modernization, which encompasses population growth, urbanization, and economic expansion, has caused extensive environmental degradation and resource depletion. Riverbeds provide natural sand, which is a typical supply of fine aggregate used in concrete making. The removal of river sands has had negative effects on the ecosystem. Steel dust is a fine substance that may be used in place of fine aggregate principally because of its comparable particle sizes. This research investigates the impact of adding wasted steel dust on concrete’s mechanical behaviour by partially replacing sand in different percentages (0%, 3%, 6%, 9%, 12%, and 15%). The water-to-cement ratio of 0.45 was used in this study. Overall, 54 concrete samples were prepared, 18 cubes (150 mm × 150 mm × 150 mm) for the compressive strength test, 18 cylinders (100 mm diameter × 200 mm height) for tensile strength, and 18 prisms (100 mm depth × 100 mm width × 500 mm length). Then tests were made for all samples to observe the strength and crack behaviour of concrete. It was found that the workability of fresh concrete decreased while the density of hardened concrete increased with steel dust replacements. Also, adding steel dust to concrete generally increases strength. The optimum value was observed in concrete containing 9% steel dust in compressive and flexural strength. An optimum value is found in concrete containing 15% steel dust for tensile strength.

Abstract Image

钢尘废料掺入对混凝土力学性能的影响
包括人口增长、城市化和经济扩张在内的现代化造成了广泛的环境恶化和资源枯竭。河床提供天然的沙子,这是一种典型的供应细骨料用于混凝土制造。河砂的清除对生态系统产生了负面影响。钢粉是一种细小的物质,可以用来代替细骨料,主要是因为它的粒度相当。本研究通过以不同比例(0%、3%、6%、9%、12%和15%)部分替代砂石,考察废钢粉对混凝土力学性能的影响。本研究采用0.45的水灰比。总共制备了54个混凝土样品,其中18个立方体(150 mm × 150 mm × 150 mm)用于抗压强度测试,18个圆柱体(100 mm直径× 200 mm高)用于抗拉强度测试,18个棱柱体(100 mm深× 100 mm宽× 500 mm长)。然后对所有试样进行试验,观察混凝土的强度和开裂行为。结果表明,随着钢粉的掺入,新拌混凝土的和易性降低,硬化混凝土的密度增加。此外,在混凝土中加入钢粉通常会增加强度。当钢粉含量为9%时,混凝土的抗压和抗折强度达到最佳值。在含有15%钢粉的混凝土中发现了抗拉强度的最佳值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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