Effects of recycled polyethylene terephthalate fibers on strength behavior of cemented Babolsar sand

Document Type : Article


1 Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran

2 Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran.

3 Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran


Construction of structures on sandy soils of northern part of Iran encounters problems due to lack of proper strength properties. In recent years, bottles of Polyethylene terephthalate (PET) such as water bottles caused an environmental threat due to their prolonged persistence. Utilization of these materials for soil improvement seems to be a sustainable approach. In this study, the effect of recycled PET on mechanical properties of Babolsar sandy soil is investigated through an experimental program using direct shear and consolidated drained (CD) triaxial compression tests. Various contents of PET were added to sand with 3%, 5% and 7% cement contents. Curing time and relative density of samples were 7 days and 70%, respectively. Results showed that addition of fiber improves strength parameters such as cohesion and internal friction angle. Furthermore, the effect of the fiber is less marked with an increase in cement content. The samples with 3% cement demonstrated better results in both direct shear and tiaxial tests. By adding 0.5% and 1% PET fibers to the samples containing 3% cement at 100 kPa pressure, the ratio of strength in direct shear tests increased 13% and 24%, respectively, and in the triaxial test, it increased 50% and 93%, respectively.


Main Subjects

1. Baynes, F.J. "Sources of geotechnical risk", Quarterly Journal of Engineering Geology and Hydrogeology, 43(3), pp. 321-331 (2010).
2. Guru, M., C ubuk, M.K., Arslan, D., Farzanian, S.A., and Bilici, _I. "An approach to the usage of polyethylene terephthalate (PET) waste as roadway pavement material", Journal of Hazardous Materials, 279, pp. 302-310 (2014).
3. Ameri, M. and Nasr, D. "Performance properties of devulcanized waste PET modified asphalt mixtures",  Petroleum Science and Technology, 35(1), pp. 99-104 (2017).
4. Gironi, F. and Piemonte, V. "Life cycle assessment of polylactic acid and polyethylene terephthalate bottles for drinking water", Environmental Progress & Sustainable Energy, 30(3), pp. 459-468 (2011).
5. Van Impe, W.F., Soil Improvement Techniques and Their Evolution, Taylor & Francis (1989).
6. Das, B.M. and Sivakugan, N. "Fundamentals of geotechnical engineering", Cengage Learning, 5th Edn. (2016).
7. Ahmad, F., Bateni, F., and Azmi, M. "Performance evaluation of silty sand reinforced with fibres", Geotextiles and Geomembranes, 28(1), pp. 93-99 (2010).
8. Changizi, F. and Haddad, A. "Strength properties of soft clay treated with mixture of nano-SiO2 and recycled polyester fiber", Journal of Rock Mechanics and Geotechnical Engineering, 7(4), pp. 367-378 (2015).
9. Chen, M., Shen, S.L., Arulrajah, A., Wu, H.N., Hou, D.W., and Xu, Y.S. "Laboratory evaluation on the effectiveness of polypropylene fibers on the strength of fiber-reinforced and cement-stabilized Shanghai soft clay", Geotextiles and Geomembranes, 43(6), pp. 515- 523 (2015).
10. Gelder, C. and Fowmes, G.J. "Mixing and compaction of fibre-and lime-modified cohesive soil", Proceeding of the Institution of Civil Engineers, Ground Improvement, 169(GI2), pp. 98-108 (2015).
11. Indraratna, B., Chu, J., and Rujikiatkamjorn, C., Ground Improvement Case Histories: Chemical, Electrokinetic, Thermal and Bioengineering, Elsevier Science (2015).
12. Sivakumar Babu, G.L. and Chouksey, S.K. "Analytical model for stress-strain response of plastic waste mixed soil", Journal of Hazardous, Toxic, and Radioactive Waste, 16(3), pp. 219-228 (2011).
13. Biabani, M.M. and Indraratna, B. "An evaluation of the interface behaviour of rail subballast stabilised with geogrids and geomembranes", Geotextiles and Geomembranes, 43(3), pp. 240-249 (2015).
14. Anagnostopoulos, C.A., Tzetzis, D., and Berketis, K. "Shear strength behaviour of polypropylene fibre reinforced cohesive soils", Geomechanics and Geoengineering, 9(3), pp. 241-251 (2014).
15. Anggraini, V., Asadi, A., Huat, B.B., and Nahazanan, H. "Effects of coir fibers on tensile and compressive strength of lime treated soft soil", Measurement, 59, pp. 372-381 (2015).
16. Botero, E., Ossa, A., Sherwell, G., and Ovando- Shelley, E. "Stress-strain behavior of a silty soil reinforced with polyethylene terephthalate (PET)", Geotextiles and Geomembranes, 43(4), pp. 363-369 (2015).
17. Falorca, I.M.C.F.G. and Pinto, M.I.M. "Effect of short, randomly distributed polypropylene microfibres on shear strength behaviour of soils", Geosynthetics International, 18(1), pp. 2-11 (2011).
18. Hamidi, A. and Hooresfand, M. "Effect of fiber reinforcement on triaxial shear behavior of cement treated sand", Geotextiles and Geomembranes, 36, pp. 1-9 (2013).
19. Malidarreh, N.R., Shooshpasha, I., Mirhosseini, S.M., and Dehestani, M. "Effects of reinforcement on mechanical behaviour of cement treated sand using direct shear and triaxial tests", International Journal of Geotechnical Engineering, 12(5), pp. 1-9 (2017).
20. Noorzad, R. and Amini, P.F. "Liquefaction resistance of Babolsar sand reinforced with randomly distributed fibers under cyclic loading", Soil Dynamics and Earthquake Engineering, 66, pp. 281-292 (2014).
21. Shukla, S.K., Fundamentals of Fibre-Reinforced Soil Engineering, Springer (2017).
22. Consoli, N.C., Prietto, P.D., and Ulbrich, L.A. "Influence of fiber and cement addition on behavior of sandy soil", Journal of Geotechnical and Geoenvironmental Engineering, 124(12), pp. 1211-1214 (1998).
23. Consoli, N.C., Casagrande, M.D., Prietto, P.D., and Thome, A.N. "Plate load test on fiber-reinforced soil", Journal of Geotechnical and Geoenvironmental Engineering, 129(10), pp. 951-955 (2003).
24. Consoli, N.C., Vendruscolo, M.A., Fonini, A., and Dalla Rosa, F. "Fiber reinforcement effects on sand considering a wide cementation range", Geotextiles and Geomembranes, 27(3), pp. 196-203 (2009).
25. Hejazi, S.M., Sheikhzadeh, M., Abtahi, S.M., and Zadhoush, A. "A simple review of soil reinforcement by using natural and synthetic fibers", Construction and Building Materials, 30, pp. 100-116 (2012).
26. Park, S.S. "Unconfined compressive strength and ductility of fiber-reinforced cemented sand", Construction and Building Materials, 25(2), pp. 1134-1138 (2011).
27. Bach, C., Dauchy, X., Severin, I., Munoz, J.F., Etienne, S., and Chagnon, M.C. "Effect of temperature on the release of intentionally and non-intentionally added substances from polyethylene terephthalate (PET) bottles into water: Chemical analysis and potential toxicity", Food Chemistry, 139(1), pp. 672-680 (2013).
28. Shotyk, W. and Krachler, M. "Contamination of bottled waters with antimony leaching from polyethylene terephthalate (PET) increases upon storage", Environmental Science & Technology, 41(5), pp. 1560-1563 (2007).
29. Steiner, G. and Zimmerer, C. "Polyethylene terephthalate (PET)", In Polymer Solids and Polymer Melts- Definitions and Physical Properties I, Springer Berlin Heidelberg, pp. 772-779 (2013).
30. Awaja, F. and Pavel, D. "Recycling of PET", European Polymer Journal, 41(7), pp. 1453-1477 (2005).
31. Jankauskaite, V., Macijauskas, G., and Lygaitis, R. "Polyethylene terephthalate waste recycling and application possibilities: a review", Mater Sci (Medziagotyra), 14(2), pp. 119-127 (2008).
32. Diambra, A., Russell, A.R., Ibraim, E., and Muir Wood, D. "Determination of fibre orientation distribution in reinforced sands", Geotechnique, 57(7), pp. 623-628 (2007).
33. Jewell, R.A. "Some factors which influence the shear strength of reinforced sand", Technical Report, University of Cambridge, Department of Engineering, 85 (1980).
34. Gray, D.H. and Ohashi, H. "Mechanics of fiber reinforcement in sand", Journal of Geotechnical Engineering, 109(3), pp. 335-353 (1983).
35. Consoli, N.C., Vendruscolo, M.A., Fonini, A., and Dalla Rosa, F. "Fiber reinforcement effects on sand considering a wide cementation range", Geotextiles and Geomembranes, 27(3), pp. 196-203 (2009).