Modification of Engineering Properties of Clayey Soil by Addition of Mine Waste

Abstract

The potential of using iron ore mine waste with an highly compressible clayey soil soil from North Karnataka, India, is investigated in this study. Mining activities lead to the production of waste materials during their extraction and processing stages. The waste maybe in the form of an overburden, waste Rock, Mine Water, or Tailings, depending on the geology, type of processing technology used and the resources mined. The lack of storage space has also been a major concern for the mineral producing agencies, thus paving ways for its better utilization in various construction processes. The collected mine waste was added to expansive soil in different percentages and the mix was tested for Atterberg limits, compaction characteristics, Unconfined compressive strength and California bearing Ratio. It was found that the liquid limit and plasticity index of the soil reduced with addition of mine waste while strength improved. Based on test results of maximum dry density and unconfined compressive strength, a mix of 40% mine waste with 60% expansive clayey soil is recommended for low cost roads. Blending mine waste with expansive soil paves way for sustainable construction besides economic benefits

Uncharted risk measures for the management of sustainable mining

“…Detailed data can be found in Mudd (2010). It is necessary to find ways to better utilize mining waste as a resource and develop novel technologies to extract the maximum quantity of metals from it (Kanalli et al, 2015; Shekdar, 2009). Minerals extracted in minor concentrations should be utilized elsewhere, or to develop techniques that allow the maximum extraction of the tailings, reprocessing minerals, using them as aggregate, soil additive, construction mineral, landscaping material, an aggregate component for building materials, mineral processing applications, copper‐rich paints, and so forth (Pappu et al, 2007; Rajendran & Gambatese, 2007).…”