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<p>The stabilization of expansive soils is a critical concern in geotechnical engineering, as these soils often exhibit poor mechanical properties, leading to issues such as high plasticity, low shear strength, and significant swelling and shrinkage behavior. The increasing demand for sustainable construction materials has prompted the exploration of industrial byproducts as effective soil stabilizers. This study investigates the influence of marble dust, a waste material from the marble industry, and molasses, an agricultural byproduct, on the geotechnical properties of expansive soil by conducting laboratory testing. Several key laboratory tests, including differential free swell, Atterberg limits, modified Proctor test, unconfined compressive strength, California bearing ratio, pH, and electric conductivity, were conducted to assess the effect of varying percentages of marble dust and molasses alone and in combination with each other on geotechnical characteristics of expansive soil. The results of laboratory testing revealed that the addition of marble dust (MD) and molasses (M) significantly reduced the differential free swell, liquid limit, and plasticity index of expansive soil (S) and nearly eliminated swelling potential with a combination of 15% MD and 6%. Also, a combination of S: MD:M:: 81:15:6 transformed the soil from high to low plasticity, making it suitable for subgrade applications. The maximum dry density was also found to be improved, reaching a value of 1.922&#xa0;g/cc at an optimum moisture content (OMC) of 10.6% for the above combination. The unconfined compressive strength (UCS) tests showed a 124% increase in strength after 28&#xa0;days, with a soaked California Bearing Ratio (CBR) of 15.28% for S: MD:M:: 81:15:6 mixture. The Scanning Electron Microscopy (SEM) analysis indicated that MD densified the soil structure, while molasses improved particle bonding. Additionally, pH and electrical conductivity tests revealed increased soil alkalinity from MD, balanced by molasses' acidity.</p>

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Eco-friendly stabilization of high plasticity soils using marble industry waste and molasses

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年10月27日

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  • Abhishek Sharma,
  • Jaipreet Kour,
  • Amenjor Senagah,
  • Aditya Kumar Tiwary,
  • Kanwarpreet Singh,
  • Gaurav Juneja,
  • Kartikey Verma,
  • Rupesh Gupta,
  • Nitin Kumar

摘要

The stabilization of expansive soils is a critical concern in geotechnical engineering, as these soils often exhibit poor mechanical properties, leading to issues such as high plasticity, low shear strength, and significant swelling and shrinkage behavior. The increasing demand for sustainable construction materials has prompted the exploration of industrial byproducts as effective soil stabilizers. This study investigates the influence of marble dust, a waste material from the marble industry, and molasses, an agricultural byproduct, on the geotechnical properties of expansive soil by conducting laboratory testing. Several key laboratory tests, including differential free swell, Atterberg limits, modified Proctor test, unconfined compressive strength, California bearing ratio, pH, and electric conductivity, were conducted to assess the effect of varying percentages of marble dust and molasses alone and in combination with each other on geotechnical characteristics of expansive soil. The results of laboratory testing revealed that the addition of marble dust (MD) and molasses (M) significantly reduced the differential free swell, liquid limit, and plasticity index of expansive soil (S) and nearly eliminated swelling potential with a combination of 15% MD and 6%. Also, a combination of S: MD:M:: 81:15:6 transformed the soil from high to low plasticity, making it suitable for subgrade applications. The maximum dry density was also found to be improved, reaching a value of 1.922 g/cc at an optimum moisture content (OMC) of 10.6% for the above combination. The unconfined compressive strength (UCS) tests showed a 124% increase in strength after 28 days, with a soaked California Bearing Ratio (CBR) of 15.28% for S: MD:M:: 81:15:6 mixture. The Scanning Electron Microscopy (SEM) analysis indicated that MD densified the soil structure, while molasses improved particle bonding. Additionally, pH and electrical conductivity tests revealed increased soil alkalinity from MD, balanced by molasses' acidity.