Enhancing Concrete Performance with Waste Foundry Sand Using Ternary Blended Mixes of Ordinary Portland Cement, Silica Fume, and Ground Granulated Blast Furnace Slag

The Structural Design of Tall and Special Buildings Pub Date : 2024-09-13 DOI:10.1002/tal.2180

S. Yamini Roja, K. Murali, V. M. Shanthi

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Abstract

Mineral admixtures play an important part in improving the strength characteristics of concrete. This manuscript presents the incorporation of silica fume (SF) and ground granulated blast furnace slag into the concrete mix to decrease the cement content and enhance the strength and concrete's durability. In addition, river sand deposits have started to dry up. Also, eco‐friendly disposal of industrial wastes acts as a major threat to industries. Hence, the use of waste foundry sand (WFS) and M‐sand (MS) as fine aggregate is attempted in this study. In the first phase of this research work, concrete specimens have been prepared by partially replaced cement with 0%, 10%, 20%, 30%, and 40% by Ground Granulated Blast Furnace Slag (GGBFS) and 0%, 5%, 10%, and 15% by SF to find their optimum replacements in Ternary Blended Concrete (TBC). In the second phase, concrete specimens replaced with 0%, 10%, 20%, 30%, and 40% by WFS for fine aggregate (MS) were prepared and found optimum usage of foundry sand in waste foundry sand concrete (WFSC). In the third phase, a ternary blended green concrete (TBGC) was prepared by partially replaced cement with 30% GGBFS and 10% SF and replaced MS with 30% WFS and conducted strength (flexural strength, compressive and split tensile strength) and durability (acid and sulfate attack) studies. The above combination was found to be a promising way for the development of environmentally friendly concrete.

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利用普通硅酸盐水泥、硅灰和磨细高炉矿渣的三元混合料提高废铸造砂的混凝土性能

矿物掺合料在提高混凝土强度特性方面发挥着重要作用。本手稿介绍了在混凝土拌合物中掺入硅灰（SF）和磨细高炉矿渣，以降低水泥含量，提高混凝土强度和耐久性的方法。此外，河砂储量已开始枯竭。此外，工业废物的环保处理也对工业构成了重大威胁。因此，本研究尝试使用废铸造砂（WFS）和中砂（MS）作为细骨料。在研究工作的第一阶段，我们制备了混凝土试样，用 0%、10%、20%、30% 和 40% 的磨细高炉矿渣（GGBFS）和 0%、5%、10% 和 15% 的 SF 部分替代水泥，以找出它们在三元掺合料混凝土（TBC）中的最佳替代物。在第二阶段，制备了以 0%、10%、20%、30% 和 40% 的 WFS 取代细骨料（MS）的混凝土试样，并找到了废铸造砂混凝土（WFSC）中铸造砂的最佳使用方法。第三阶段，制备了一种三元混合绿色混凝土（TBGC），用 30% 的 GGBFS 和 10% 的 SF 部分替代水泥，用 30% 的 WFS 替代 MS，并进行了强度（抗折强度、抗压强度和劈裂拉伸强度）和耐久性（酸和硫酸盐侵蚀）研究。研究发现，上述组合是开发环境友好型混凝土的一种可行方法。

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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The Structural Design of Tall and Special Buildings

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