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Experimental investigation of bentonite impact on self-healing of clay soils

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Abstract

Compacted clay layers are known as earth dams’ most common impermeable layer. However, owing to the specific nature of clay and Atterberg limits, an increase in age damage, these layers by cracking them. Despite this, the crack-healing property of clay is the main factor in closing external cracks. In this regard, in this study, a new method is used to evaluate clays’ self-healing characteristic by pinhole tests with the variation of the Plasticity Index (PI). For this purpose, three soil samples from the Vanyar Dam located in Iran were treated to obtain the PI between 7 and 26 by adding different percentages of bentonite (i.e., 5%, 10%, 15%, and 20%) and the impact of bentonite percentage increase was investigated on self-healing property and outflow rate of clay soil. Subsequent to geotechnical tests, the obtained results showed that adding bentonite to the soil samples with optimum water content and 2% below it, decreases soil dispersion and makes it non-dispersive. In addition, the self-healing phenomenon was visible and predictable with the increase of bentonite in natural soil; as for the sample with 20% bentonite, this phenomenon was observed from an early age due to high PI and the potential for high inflation. Also, the sample with 20% bentonite and a moisture content of 2% less than the optimum showed the most reduction in the outflow (38%) when compared with the natural soil sample. Therefore, it can be concluded that the PI variation (between 7 and 26) can cause non-dispersivity of clay and increase the self-healing ability.

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References

  • Aitchison G, Wood C (1965) Some interactions of compaction, permeability, and post-construction deflocculation affecting the probability of piping failure in small earth dams. Proc 6th ICSMFE 2:442–446

  • Bendahmane F, Marot D, Alexis A (2008) Experimental parametric study of suffusion and backward erosion. J Geotech Geoenviron Eng 134:57–67

    Article  Google Scholar 

  • Eigenbrod K (2003) Self-healing in fractured fine-grained soils. Can Geotech J 40:435–449

    Article  Google Scholar 

  • Fell R, Wan CF, Cyganiewicz J, Foster M (2003) Time for development of internal erosion and piping in embankment dams. J Geotech Geoenviron Eng 129:307–314

    Article  Google Scholar 

  • Foster M, Fell R, Spannagle M (2000a) A method for assessing the relative likelihood of failure of embankment dams by piping. Can Geotech J 37:1025–1061

    Article  Google Scholar 

  • Foster M, Fell R, Spannagle M (2000b) The statistics of embankment dam failures and accidents. Can Geotech J 37:1000–1024

    Article  Google Scholar 

  • Honjo Y, Veneziano D (1989) Improved filter criterion for cohesionless soils. J Geotech Eng 115:75–94

    Article  Google Scholar 

  • Kakuturu S, Reddi LN (2006a) Evaluation of the parameters influencing self-healing in earth dams. J Geotech Geoenviron Eng 132:879–889

    Article  Google Scholar 

  • Kakuturu S, Reddi LN (2006b) Mechanistic model for self-healing of core cracks in earth dams. J Geotech Geoenviron Eng 132:890–901

    Article  Google Scholar 

  • Moffat R, Fannin RJ, Garner SJ (2011) Spatial and temporal progression of internal erosion in cohesionless soil. Can Geotech J 48:399–412

    Article  Google Scholar 

  • Roushangar K, Homayounfar F (2019) Prediction characteristics of free and submerged hydraulic jumps on horizontal and sloping beds using SVM method. KSCE J Civ Eng 23:4696–4709

    Article  Google Scholar 

  • Seed HB, Woodward J, Lundgren R (1962) Prediction of swelling potential for compacted clays. J Soil Mech Found Div 88:53–88

    Google Scholar 

  • Sherard J, Decker R (1977) Summary—evaluation of symposium on dispersive clays. In: Dispersive Clays, Related Piping, and Erosion in Geotechnical Projects. ASTM International

  • Sherard JL, Decker RS, Ryker NL (1972) Piping in earth dams of dispersive clay. Proceedings, Specialty Conference on Performance of Earth and Earth-Supported Structures. ASCE, 1:584-626

  • Wang J-J, Zhang H-P, Zhang L, Liang Y (2013) Experimental study on self-healing of crack in clay seepage barrier. Eng Geol 159:31–35

    Article  Google Scholar 

Download references

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Authors and Affiliations

  1. Department of Civil Engineering, University of Tabriz, Tabriz, Iran

    Kiyoumars Roushangar, Mohammad Taghi Alami & Yagoub Houshyar

  2. Center of Excellence in Hydroinformatics, University of Tabriz, Tabriz, Iran

    Kiyoumars Roushangar

Authors
  1. Kiyoumars Roushangar
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  2. Mohammad Taghi Alami
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  3. Yagoub Houshyar
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Correspondence to Kiyoumars Roushangar.

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Responsible Editor: Zeynal Abiddin Erguler

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Roushangar, K., Alami, M.T. & Houshyar, Y. Experimental investigation of bentonite impact on self-healing of clay soils. Arab J Geosci 13, 1122 (2020). https://doi.org/10.1007/s12517-020-06131-x

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  • DOI: https://doi.org/10.1007/s12517-020-06131-x

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