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Comparative Study of Expansive and Non-expansive Soils Stabilized with Lime and Rice Husk Ash (RHA)

  • Kaling TakiEmail author
  • Paramita Bhattacharya
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 55)

Abstract

The study focusses on comparative analysis of mechanical properties of Bentonite (expansive soil) and Kaolinite (non-expansive soil) treated with Lime and Rice Husk Ash (RHA). Unconfined Compressive Strength (UCS) tests were carried out for different curing periods of 0, 3, 7, 21 and 28 days. X-ray Diffraction and Scanning Electron Microscope tests were carried out to study the mineralogical and microstructural properties of the soil. Beyond optimum content the strength was found to decrease for all cases. In case of Lime the reduction in strength may be due to formation of the silica gel or excess Lime content beyond the optimum content may act as a lubricating agent between two-soil particle and reducing the shear resistance. In case of RHA the reduction in strength may be due to the formation of coarse particles which results in lower densities and more void formation. It was observed that UCS of Lime treatment is approximately 3 times higher than that of RHA treatment. In case of non-expansive soil, it was 3.5 times higher in Lime than RHA treatment.

Keywords

Lime Rice husk ash (RHA) Free swell index (FSI) Bentonite Kaolinite 

Notes

Acknowledgements

Financial Support from IIT Kharagpur is gratefully acknowledged. Any opinions, findings, and conclusions or recommendations expressed in this material are those of authors and do not necessarily reflect the views of IIT Kharagpur.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Civil Engineering, Indian Institute of Technology GandhinagarGandhinagarIndia
  2. 2.Civil Engineering, Indian Institute of Technology KharagpurKharagpurIndia

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