Experimental Study on Lime-Stabilization of Isfahan Landfill

Articles in Press

Document Type : Regular Paper

Authors

1 Associate Professor, Department of Civil Engineering, Shahrekord University, Shahrekord, Iran

2 M.Sc. Graduate, Department of Civil Engineering, Shahrekord University, Shahrekord, Iran

10.22075/jrce.2024.31692.1895

Abstract

Utilization of landfills for possible construction projects requires investigation and improvement of geomaterials in these areas. In this research, the effects of lime on improving the behavior of soil materials in Isfahan landfill were investigated through a series of laboratory experiments. Unstabilized and stabilized samples with 3 %, 6 % and 9 % lime were tested. Direct shear tests under different overburden and falling head permeability tests were conducted. X-ray diffraction tests were also performed to check the structure of the samples. Also, the scanning electron microscope images of the tested samples were prepared and compared. The results indicate that the lime-stabilization improves the stress-strain behavior of the treated samples. At the strains greater than 1 %, the positive effect of lime-stabilization of treated soil samples is obvious. Tests results indicate that the optimal amount of lime for Isfahan landfill’s soil stabilization is 6 %. Stabilization of samples with 6% lime under vertical overburden stresses of 0.5, 1 and 2 kg/cm2 increases the maximum shear strength of the samples by 113.95 %, 30.95 % and 9.88 %, respectively. The results show that the permeability coefficient of stabilized samples decreases with the increase of lime content. Stabilization using 3 %, 6 % and 9 % lime has resulted in a decrease of 14.66 %, 84.83 % and 93.62 % of the permeability coefficient of the landfill soil samples compared to the unstabilized samples, respectively. The results also show that the decreasing rate of permeability coefficient is increasing up to 6 % of lime and beyond that has decreased.

Graphical Abstract

Experimental Study on Lime-Stabilization of Isfahan Landfill

Highlights

  • Lime-stabilization of Isfahan landfill’s geomaterials
  • Assessment of the behavior of stabilized specimens using direct shear and permeability experiments
  • Comparing shear strength and permeability of stabilized and unstabilized specimens
  • Analysis of lime-stabilization method using SEM images and XRD tests

Keywords

Main Subjects

References

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Journal of Rehabilitation in Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 14 May 2024

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History

  • Receive Date: 03 September 2023
  • Revise Date: 11 March 2024
  • Accept Date: 14 May 2024

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