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Strength and Microstructure Evolution of Soft Soils by Using Nano-silica

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Ground Characterization and Foundations

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 167))

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Abstract

A comparative study on the effect of nano-silica (NS) on physical, chemical, and microstructural characteristics of soft soil were investigated. Nano-silica is widely used in concrete and cement-stabilized soft soil to enhance macro performance. Up to now, the improvement of soft soil using nano-silica is not completely explored. In this study, a comparison has been done to determine the potential of nano-silica to stabilize the soil. Different experimental work has been performed, especially the standard proctor test, unconfined compressive strength (UCS), and California bearing ratio (CBR) of clay with highly compressible (CH) soil adding nano-silica. The soil considered here accommodates varying percentages of nano-silica (0.6, 0.8, 1, 1.5% by weight of soil) and is added for investigation of the relative strength enhance of soil. The present study is to evaluate the maximum dry density, unconfined compressive strength, and California bearing ratio of soil using varying percentages of nano-silica. The test outcomes explain that the shear strength, UCS, and CBR values of soil increase by the addition of nano-silica in soil. The result showed that the addition of nano-silica with soft soil can accelerate hydration, improve the interfacial zone between soil particles and binder, due to pozzolanic nature and fine particle size. By using scanning electron microscopy (SEM), the interaction at the interface between nano-silica and soil matrix was analyzed. And by energy-dispersive X-ray spectroscopy technique (EDS), the elements and chemical characteristics of soil are analyzed.

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Authors and Affiliations

  1. Civil Engineering Department, VSSUT, Burla, 768017, India

    Anuradha Patro & Rupashree Ragini Sahoo

Authors
  1. Anuradha Patro
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  2. Rupashree Ragini Sahoo
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Editor information

Editors and Affiliations

  1. Geotechnical Engineering Division, Department of Civil Engineering, Andhra University College of Engineering, Visakhapatnam, Andhra Pradesh, India

    C. N. V. Satyanarayana Reddy

  2. Geotechnical Engineering Division, Department of Civil Engineering, National Institute of Technology Tiruchirappalli, Tiruchirappalli, Tamil Nadu, India

    K. Muthukkumaran

  3. Discipline of Civil Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, India

    Neelima Satyam

  4. Geo Dynamics, Vadodara, India

    Ravikiran Vaidya

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Patro, A., Sahoo, R.R. (2022). Strength and Microstructure Evolution of Soft Soils by Using Nano-silica. In: Satyanarayana Reddy, C.N.V., Muthukkumaran, K., Satyam, N., Vaidya, R. (eds) Ground Characterization and Foundations. Lecture Notes in Civil Engineering, vol 167. Springer, Singapore. https://doi.org/10.1007/978-981-16-3383-6_29

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  • DOI: https://doi.org/10.1007/978-981-16-3383-6_29

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-16-3382-9

  • Online ISBN: 978-981-16-3383-6

  • eBook Packages: EngineeringEngineering (R0)

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