Abstract

In the last two decades, the scientific community, by the efforts of researchers, has witnessed many attempts to find alternative materials for natural sand using industrial waste materials instead of natural river sand, with a major goal of preserving the natural environmental resources. One of the industrial waste materials, is Used Foundry Sand (UFS), which is processed and used in concrete as a partial replacement for fine aggregate as Treated Used Foundry Sand (TUFS). The precise and all-inclusive investigation on the corrosion resistant characteristics of TUFS blended concrete is very scant. Therefore, experimentations were conducted to study the corrosion resistance performance of TUFS as partial replacements for fine aggregate. TUFS were substituted for fine aggregate in different weight percentages. The reinforced concrete specimens were casted to 5% NaCl under accelerated corrosion process. Apart from half-cell potential measurement, impress current techniques were employed to assess rebar corrosion, and microstructural analysis was carried out using X Ray Diffraction (XRD). According to test results, TUFS concrete has better corrosion resistance qualities than control concrete, paving the way for high-quality concrete production.

摘要

在过去的二十年里，科学界在研究人员的努力下，见证了许多使用工业废料代替天然河砂寻找天然砂替代材料的尝试，其主要目标是保护自然环境资源。工业废料之一是用过的铸造砂 (UFS)，它被加工并用于混凝土中，作为处理过的铸造用砂 (TUFS) 的细骨料的部分替代品。对 TUFS 混合混凝土耐腐蚀特性的精确和全面的研究非常少。因此，进行了实验以研究 TUFS 作为细骨料的部分替代品的耐腐蚀性能。TUFS 以不同的重量百分比代替细骨料。钢筋混凝土试件在加速腐蚀过程中浇铸至 5% NaCl。除了半电池电位测量外，还采用外加电流技术评估钢筋腐蚀，并使用 X 射线衍射 (XRD) 进行微观结构分析。试验结果表明，TUFS混凝土比对照混凝土具有更好的耐腐蚀性能，为生产优质混凝土铺平了道路。