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Due to rapid urbanization, the infrastructural developments are taking place at faster pace in developing countries like India. As engineers often face complexities while undertaking construction activities when expansive soils are encountered. In the present study, a novel binder is developed to modify the properties of an expansive soil subjected to grain size analysis, standard proctor compaction and unconfined compressive strength (UCS) tests. An optimum fly ash content of 12% for treated soil is reported as maximum UCS. Further, the soil is treated using optimum fly ash content blended with red mud (RM) varying from 5% to 20% at an increment of 5% along with 6 M calcium hydroxide solution as a pore fluid. To assess the behaviour of a strip footing resting on fly ash-red mud (FR) treated soil is analyzed using Plaxis 2D. The present investigation indicates that the novel binder is found effective in improving the engineering properties as well as settlement characteristics and bearing capacity of soil upon treatment.

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Experimental and Numerical Investigation on Expansive Soil Treated with Fly Ash Coupled Red Mud

  • 会议论文

  • 发表日期：

    2025年

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  • Ravichandra Honnalli,
  • K. E. Abilash,
  • Adarsh S. Chatra,
  • Muttana S. Balreddy

摘要

Due to rapid urbanization, the infrastructural developments are taking place at faster pace in developing countries like India. As engineers often face complexities while undertaking construction activities when expansive soils are encountered. In the present study, a novel binder is developed to modify the properties of an expansive soil subjected to grain size analysis, standard proctor compaction and unconfined compressive strength (UCS) tests. An optimum fly ash content of 12% for treated soil is reported as maximum UCS. Further, the soil is treated using optimum fly ash content blended with red mud (RM) varying from 5% to 20% at an increment of 5% along with 6 M calcium hydroxide solution as a pore fluid. To assess the behaviour of a strip footing resting on fly ash-red mud (FR) treated soil is analyzed using Plaxis 2D. The present investigation indicates that the novel binder is found effective in improving the engineering properties as well as settlement characteristics and bearing capacity of soil upon treatment.