Shaimaa Hasan Fadhil  1 , Madhat Shakir Al-Soud1 , and Raghad Mohammed Kudadad1

1Mustansiriyah University/ College of Engineering/ Civil Engineering Department


Received: September 8, 2020
Accepted: December 23, 2020
Publication Date: June 1, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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The addition of waste plastic bottle strips to soil as a reinforcing material is widely used nowadays to enhance the engineering properties of soils. In this study, series of unconfined compression tests were conducted on clayey sand soil with and without adding strips of waste plastic bottle to investigate the effect of adding plastic strips on the shear strength of soil. Two types of plastic strips were used in this research depending on the nature of the strip surface whether plain or corrugated. Different sizes of plain strips (BxL) were used namely (1x5), (1x10), (1x15), (2x5), (2x10), (2x15), (3x5), (3x10) and (3x15) mm, while one size of corrugated strips was used namely; (1x15) mm, where B and L are the width and length of a strip, respectively. All the plastic strips are of the same thickness of 0.4mm. Both the plain and corrugated plastic strips were added with different percentage ratios of 0.25, 0.5, 0.75 and 1.0 % by the dry weight of soil sample. For a particular ratio, a significant increase in unconfined compressive strength qu of soil was observed when adding plain plastic strip of size (1x15) mm for addition ratio of 1.0 % while more increase in unconfined compressive strength qu was deducted when adding corrugated plastic strips of the same size and addition ratio.

Keywords: Soil improvement, plastic reinforced clayey sand soil, unconfined compressive strength, plain strip, corrugated strip.


  1. [1] Sung Sik Park. Effect of fiber reinforcement and distribution on unconfined compressive strength of fiberreinforced cemented sand. Geotextiles and Geomembranes, 27(2):162–166, 2009.
  2. [2] N C Consoli, M. D.T. Casagrande, and M R Coop. Performance of a fibre-reinforced sand at large shear strains. Geotechnique, 57(9):751–756, nov 2007.
  3. [3] Nilo Cesar Consoli, Franco Zortéa, Maurício de Souza, and Lucas Festugato. Studies on the Dosage of FiberReinforced Cemented Soils. Journal of Materials in Civil Engineering, 23(12):1624–1632, dec 2011.
  4. [4] Wei Shao, Bora Cetin, Yadong Li, Jingpei Li, and Lin Li. Experimental Investigation of Mechanical Properties of Sands Reinforced with Discrete Randomly Distributed Fiber. Geotechnical and Geological Engineering, 32(4):901– 910, 2014.
  5. [5] S. Peddaiah, A. Burman, and S. Sreedeep. Experimental Study on Effect of Waste Plastic Bottle Strips in Soil Improvement. Geotechnical and Geological Engineering, 36(5):2907–2920, oct 2018.
  6. [6] Kwestan Salimi and Mahmoud Ghazavi. Soil reinforcement and slope stabilisation using recycled waste plastic sheets. Geomechanics and Geoengineering, 2019.
  7. [7] ASTM International. D854 - 14 Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer.
  8. [8] BSI British Standards. 1377-2:1990 - Methods of test for soils for civil engineering purposes. Classification tests.
  9. [9] ASTM International. D4318 - Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, 2010.
  10. [10] ASTM International. D1557-03 Standard Test Method for Laboratory Compaction Characteristics of Soils Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3)).
  11. [11] ASTM International. D2166/D2166M–16 Standard Test Method for Unconfined Compressive Strength of Cohesive Soil.
  12. [12] Karla Salvagni Heineck, Matthew Richard Coop, and Nilo Cesar Consoli. Effect of Microreinforcement of Soils from Very Small to Large Shear Strains. Journal of Geotechnical and Geoenvironmental Engineering, 131(8):1024–1033, aug 2005.
  13. [13] Ramanathan Ayothiraman and Anurag Singh. Improvement of Soil Properties By Basalt. In Joint Conference on Piled Foundations & Ground Improvement Technology for the Modern Building and Infrastructure Sector, number March, pages 403–412, 2017.
  14. [14] Yi Cai, Bin Shi, Charles W.W. Ng, and Chao sheng Tang. Effect of polypropylene fibre and lime admixture on engineering properties of clayey soil. Engineering Geology, 87(3-4):230–240, 2006.
  15. [15] Yixian Wang, Panpan Guo, Xian Li, Hang Lin, Yan Liu, and Haiping Yuan. Behavior of fiber-reinforced and lime-stabilized clayey soil in triaxial tests. Applied Sciences (Switzerland), 9(5), 2019.

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