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Eco-concrete for sustainability: utilizing aluminium dross and iron slag as partial replacement materials

机译：可持续发展的生态混凝土：利用铝渣和铁渣作为部分替代材料

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Emphasis on utilizing the industrial waste/discarded materials can be brought about by discovering innovative methods of disposal. One such a way of waste disposal can be through utilizing them in concrete production as a filler material or pozzolana. In this regard, the present study proposes to use the aluminium dross and granular iron slag as partial replacement materials for cement and natural sand, respectively, to develop eco-concrete. Nine mixes were produced with different proportions of cement, aluminium dross, sand and granular iron slag content. The aluminium dross was replaced at 5, 10, 15 and 20% of the weight of the cement. Initially, the optimal substitution percentage of aluminium dross was found without the substitution of iron slag based on the strength results. Later, by adopting the optimal aluminium dross percentage with cement, the granular iron slag was partially substituted at 10, 20, 30 and 40% of natural sand to find the overall optimal blend. The strength and durability properties of the M40 grade concrete employing these two admixture combinations were analysed. It was noticed that the strength and durability properties of the eco-concrete produced by incorporating aluminium dross -5% and iron slag -20% were comparable to that of conventional concrete. Furthermore, from the toxicity analysis, it was seen that the leaching of heavy and trace elements from the eco-concrete was negligibly small and within the limits. In near future, the cost-effective, eco-friendly materials and technologies can be opted as a perpetual strategy to overcome severe material shortages for resource conservation and economy.
机译：通过发现创新的处置方法，可以强调利用工业废物/废弃物料。一种这样的废物处理方式可以是在混凝土生产中利用它们作为填充材料或火山灰。在这方面，本研究建议分别使用铝渣和粒状铁渣作为水泥和天然砂的部分替代材料，以开发生态混凝土。生产出了九种混合料，其中水泥，铝渣，砂子和颗粒铁渣的含量不同。用水泥重量的5％，10％，15％和20％代替了铝渣。最初，基于强度结果，发现了铝渣的最佳替代百分比而没有铁渣的替代。后来，通过采用水泥中最佳的铝渣百分比，以天然砂的10％，20％，30％和40％部分取代了粒状铁渣，从而找到了整体最佳混合料。分析了使用这两种外加剂组合的M40级混凝土的强度和耐久性能。注意到，通过掺入铝渣-5％和铁渣-20％所生产的生态混凝土的强度和耐久性能与传统混凝土相当。此外，从毒性分析可以看出，从生态混凝土中浸出的重金属和微量元素很小，可以忽略不计。在不久的将来，可以选择具有成本效益，环保的材料和技术作为克服资源短缺和资源节约和经济的永久策略。

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