Durability characteristics of geopolymer concrete produced using gold ore tailings along with recycled coarse aggregates.

IF 3.8 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Scientific Reports Pub Date : 2025-04-08 DOI:10.1038/s41598-025-97056-6

Eshwarayya Bolluru Lokesha, Mangalpady Aruna, Sandi Kumar Reddy

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Abstract

The Gold Ore Tailings (GOTs) are one of the major waste materials in the mining sector. The disposal of these tailings could be a problem for human health and a major environmental concern for several years. In this research work, the GOTs were used as an alternative material to the River Sand (RS) in the production of Geopolymer Concrete (GPC). Thus developed GPC samples were tested for its durability characteristics, such as resistance to sulphates and chlorides. The sulphate attack test was conducted by immersing the Conventional Concrete (CC) and GPC samples in 5% Magnesium Sulphate (MgSO₄) solution for various curing periods. In this test, the GPC samples showed a reduction in compressive strength and weight, which is slightly more when compared to CC samples. The Rapid Chloride Penetration Test (RCPT) was also conducted to know the chloride ion penetration in which GPC samples exhibited less chloride penetration when compared to CC samples. Further, the Toxic Characteristic Leaching Procedure (TCLP) analysis showed that the GOTs have very high concentrations of hazardous metals. However, the concentration of Cyanide (CN^-) was minimal in GOTs. In this regard, geopolymerization would be a better method for immobilizing the hazardous metals in GOTs.

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用金尾矿和再生粗骨料生产地聚合物混凝土的耐久性特性

金矿石尾矿是采矿部门的主要废物之一。这些尾矿的处理可能会对人类健康造成问题，并在数年内成为一个主要的环境问题。在本研究中，将GOTs作为河砂（RS）的替代材料用于生产地聚合物混凝土（GPC）。因此，开发的GPC样品进行了耐久性特性测试，例如对硫酸盐和氯化物的抗性。将常规混凝土（CC）和GPC样品浸泡在5%硫酸镁（MgSO4）溶液中进行不同养护时间的硫酸盐侵蚀试验。在此测试中，GPC样品显示抗压强度和重量的降低，与CC样品相比略有减少。通过快速氯离子渗透试验（RCPT）了解氯离子渗透，GPC样品比CC样品表现出更少的氯离子渗透。此外，毒性特征浸出程序（TCLP）分析表明，got含有非常高浓度的有害金属。然而，氰化物（CN-）的浓度在GOTs中是最低的。在这方面，地聚合将是固定化got中有害金属的较好方法。

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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来源期刊

Scientific Reports Natural Science Disciplines-

CiteScore

7.50

自引率

4.30%

发文量

19567

审稿时长

3.9 months

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