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Effect of Pore Size Distribution on Unconfined Compressive Shear Strength

  • N. Saranya
  • D. N. Arnepalli
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 16)

Abstract

The unconfined compressive strength is one of the influencing parameters that are used for determining the in situ strength of soft, fine-grained soil deposits. Since many previous research works have highlighted the influence of pore fluid type, electrolyte concentration, pH and valence of the pore fluid on unconfined compressive shear strength. The present study has inferred the effect of pore size distribution (PSD) on unconfined compressive shear strength (UCS) of bentonite and kaolinite minerals. It is observed that the pore size distribution of bentonite is a bimodal distribution representing both interpore and intrapore, whereas the kaolinite mineral exhibits a unimodal distribution representing only the interpore. The interpore represents the water molecules bounded between soil aggregates, whereas the intrapore represents the water molecules bounded within the soil aggregated and on the clay surface. From the obtained UCS value of bentonite and kaolinite minerals, it can be inferred that the UCS strength variation of bentonite mineral is strongly influenced by the water molecules bounded on the clay surface or diffused double layer water, whereas the UCS strength of kaolinite minerals is controlled by the net attractive force between the clay particles. The present study demonstrated that the pore size distribution is also one of the parameters that strongly influences the unconfined compressive strength of the soil.

References

  1. Du, Y., Li, S., & Hayashi, S. (1999). Swelling-shrinkage properties and soil improvement of compacted expansive soil, Ning-Liang Highway, China. Engineering Geology, 53, 351–358.CrossRefGoogle Scholar
  2. Heeralal, M., Murty, V. R., Praveen, G. V., & Shankar, S. (2012). Influence of calcium chloride and sodium silicate on index and engineering properties of bentonite. In International Conference on Chemical, Environmental science and Engineering (ICEEB’2012) (pp. 52–57).Google Scholar
  3. Lin, B., & Cerato, A. B. (2012). Prediction of expansive soil selling based on four micro-scale properties. Bulletin of Engineering Geology and Environment, 71, 71–78.CrossRefGoogle Scholar
  4. Mitchell, J. K. (1976). Fundamentals of soil behavior (2nd ed.). New York: Wiley.Google Scholar
  5. Romero, E., Gens, A., & Lloret, A. (1999). Water permeability, water retention and micro-structure of unsaturated Boom clay. Engineering Geology, 54, 117–127.CrossRefGoogle Scholar
  6. Sasanian, S., & Newson, T. A. (2013). Use of mercury intrusion porosimetry for microstructural investigation of reconstituted clays at high water contents. Engineering Geology, 158, 15–22.CrossRefGoogle Scholar
  7. Sridharan, A., & Prakash, K. (1999). Mechanisms controlling the undrained shear strength behavior of clays. Canadian Geotechnical Journal, 36, 1030–1038.CrossRefGoogle Scholar
  8. Umesh, T. S., Sharma, H. D., Dinesh, S. V., Sivapullaiah, P. V., & Basim, S. C. (2011). Physico-chemical changes in soil due to sulphuric acid contamination. In Proceedings of Indian Geotechnical Conference (Paper no. L-320, pp. 765–768).Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of Civil EngineeringIndian Institute of Technology MadrasChennaiIndia

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