Improving the Bearing Capacity of Clay Soil Using Plastic Bottle Waste


  • Zainab Essam Sabih University of baghdad
  • Abbas Fadhil Ibrahim Al-Ameri



Carrying capacity, Plastic waste, Compression index (Cc), Swelling index C(Cr)


With the increase in industry and industrial products, quantities of waste have increased worldwide, especially plastic waste, as plastic pollution is considered one of the wastes of the modern era that threatens the environment and living organisms. On this basis, a solution must be found to use this waste and recycle it safely so that it does not threaten the environment. Therefore, this research used plastic waste as an improvement material for clay soil. In this research, two types of tests were conducted, the first of which was a laboratory test, where the undrained shear strength (cohesion), compression index (Cc), and swelling index (Cr) of the improved and unimproved soils were calculated (plastic was added in proportions (0.5, 1, 1.5, 2)%. The second part of the examination was done through physical modeling, where 2% of plastic was used, considered the optimal percentage in this research, and the calculation of the carrying capacity-settlement relationship for both the improved and unimproved soils. Using this percentage of plastic showed an improvement in the relationship between the bearing capacities of soil vs. subsidence, as an increase in the amount of stress was observed from 405 KPa to 459 kPa at 10% of subsidence.


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Abd Al-kaream, K.W., Fattah, M.Y., Hameedi, M.K., 2022. Compressibility and strength development of soft soil by Polypropylene fiber, International Journal of GEOMATE, pp. 91-97. Doi:10.21660/2022.93.3206.

Al-Haddad, S.A., Al-Ani, F.H., and Fattah, M.Y., 2022. Effect of using plastic waste bottles on soil response above buried pipes under static loads. Applied Sciences, P., 12304.‏ Doi:10.3390/app122312304.

Abousnina, R., Alsalmi, H. I., Manalo, A., Allister, R. L., Alajarmeh, O., Ferdous, W., and Jlassi, K., 2021. Effect of short fibres in the mechanical properties of geopolymer mortar containing oil-contaminated sand. Polymers, P. 3008.‏ Doi:10.3390/polym13173008.

Ahmadinia, E., Zargar, M., Karim, M.R., and Abdelaziz, M.,2012. Performance evaluation of utilization of waste Polyethylene Terephthalate (PET) in stone mastic asphalt. Construction and Building Materials, pp. 984-989.‏ Doi:10.1016/j.conbuildmat.2012.06.015.

Alzaidy, M.N.J., 2019. Experimental study for stabilizing clayey soil with eggshell powder and plastic wastes. In IOP Conference Series: Materials Science and Engineering, P. 022008. Doi:10.1088/1757-899X/518/2/022008.

Alasadi, G.N., and Ali, S., 2022. A Review of the asphalt mixtures containing recycled solid waste materials. Journal of Engineering, 28(7), pp. 1-15. Doi:10.31026/j.eng.2022.07.01.

Atkins, H.N., 1980, Highway Materials, Soil, and Concretes, Reston Publishing Company, Inc. Reston, Virginia.

ASTM, D 2216 – 10, .2010. Standard test methods for laboratory determination of water (moisture). content of soil and rock by mass. ASTM International Standards,

ASTM, D698, 2014. Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort. ASTM International Standards.

ASTM, 2014. Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer. ASTM International Standards, D 854 – 14.

ASTM, 2017. Standard Test Method for Liquid Limit, Plastic Limit and Plasticity Index of Soil. ASTM International Standards, D4318.

ASTM, 2004. Standard test methods for one-dimensional consolidation properties of soils using incremental loading. ASTM International Standards, D2435.

ASTM, 2001. Standard Test Method for Particle-Size Analysis of Soils, American society for testing and materials.‏ D422.

ASTM, 2016. Standard Test Method for Unconfined Compressive Strength of Cohesive Soil. West Conshoshocken, PA, United States.‏ D2166.

ASTM D2487-17e1, American Society for Testing and Materials Filadelfia, Pennsylvania, 2017. Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System). ASTM.‏

Babu, G. L.S., and Chouksey, S.K., 2011. Stress-strain response of plastic waste mixed soil. Waste Management, pp. 481–488. Doi:10.1016/j.wasman.2010.09.018.

Choudhary, A.K., Jha, J.N., Gill, K.S., and Shukla, S.K., 2014. Utilization of fly ash and waste recycled product reinforced with plastic wastes as construction materials in flexible pavement. In Geo-Congress 2014: Geo-characterization and Modeling for Sustainability, pp. 3890-3902.‏ Doi:10.1061/9780784413272.377.

Fauzi, A., Djauhari, Z., and Fauzi, U. J., 2016. Soil engineering properties improvement by utilization of cut waste plastic and crushed waste glass as additive. International Journal of Engineering and Technology, P. 15.‏ Doi:10.7763/ijet.2016.v8.851.

Iravanian, A., and Haider, A.B., 2020. Soil Stabilization Using Waste Plastic Bottles Fibers: A Review Paper. In IOP Conference Series: Earth and Environmental Science, pp. 012082. IOP Publishing.‏ Doi:10.1088/1755-1315/614/1/012082.

Iravanian, A., and Ali, S., 2020. Soil Improvement Using Waste Plastic Bags: A Review Paper. In IOP Conference Series: Earth and Environmental Science, pp. 012080. IOP Publishing.‏ Doi:10.1088/1755-1315/614/1/012080.

Yadav, J.S., and Tiwari, S.K., 2016. Behaviour of cement stabilized treated coir fibre-reinforced clay-pond ash mixtures. Journal of Building Engineering, 8, pp.131-140. Doi:10.1016/j.jobe.2016.10.006.

Yadav, J.S., Tiwari, S.K., and Shekhwat, P., 2018. Strength behaviour of clayey soil mixed with pond ash, cement and randomly distributed fibres. Transportation Infrastructure Geotechnology, 5, pp.191-209. Doi:10.1007/s40515-018-0056-z

Geyer, R., Jambeck, J.R. and Law, K.L., 2017. Production, use, and fate of all plastics ever made. Science advances, 3(7), p.e1700782. Doi:10.1126/sciadv.1700782.

Modarres, A., and Hamedi, H., 2014. Effect of waste plastic bottles on the stiffness and fatigue properties of modified asphalt mixes. Materials and Design, pp. 8-15.‏ Doi:10.1016/j.matdes.2014.04.046.

Muntohar, A.S., Widianti, A., Hartono, E., and Diana, W., 2013. Engineering properties of silty soil stabilized with lime and rice husk ash and reinforced with waste plastic fiber. Journal of Materials in Civil Engineering, pp. 1260–1270. Doi:10.1061/(asce)mt.1943-5533.0000659.

Olgun, M., 2013. Effects of polypropylene fiber inclusion on the strength and volume change characteristics of cement-fly ash stabilized clay soil. Geosynthetics International, pp. 263–275, Doi:10.1680/gein.13.00016.

Ogundairo, T.O., Olukanni, D.O., Akinwumi, I.I., and Adegoke, D.D., 2021. A review on plastic waste as sustainable resource in civil engineering applications. In IOP Conference Series: Materials Science and Engineering, P. 012019. ‏ Doi:10.1088/1757-899X/1036/1/012019.

Peddaiah, S., Burman, A., and Sreedeep, S., 2018. Experimental study on effect of waste plastic bottle strips in soil improvement. Geotechnical and Geological Engineering, PP. 2907-2920.‏ Doi:10.1007/s10706-018-0512-0.

Qasim, M.F., Abbas, Z.K., and Abed, S.K., 2021. A review in sustainable plastic waste in concrete. Journal of Engineering, 27(12), pp. 13-22.

Salih, N. B., Rashed, K. A., and Abdulwahab, K., 2022. Experimental study on using cement kiln dust and plastic bottle waste to improve the geotechnical characteristics of expansive soils in Sulaimani city, northern Iraq. Journal of Engineering, pp. 20-37.

Salimi, K., and Ghazavi, M., 2021. Soil reinforcement and slope stabilisation using recycled waste plastic sheets. Geomechanics and Geoengineering, pp. 497-508.‏ Doi:10.1080/17486025.2019.1683620.

Singh, K., and Mittal, A., 2019. Soil Stabilisation Using Plastic Waste. In Recycled Waste Materials: Proceedings of EGRWSE 2018, pp. 91-96. Springer Singapore.‏

Sorsa, A., Senadheera, S., and Birru, Y., 2020. Engineering characterization of subgrade soils of Jimma town, Ethiopia, for roadway design. Geosciences, P. 94.‏ Doi:10.3390/geosciences10030094.

Tilaye, M., van Dijk M.P., 2014. Sustainable Solid Waste Collection in Addis Ababa: the Users? Perspective. International Journal of Waste Resources, pp. 158-168. Doi:10.4172/2252-5211.1000158.

Tang, C., Shi, B., Gao, W., Chen, F., and Cai, Y., 2007. Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil. Geotextiles and Geomembranes, pp. 194-202.‏ Doi:10.1016/j.geotexmem.2006.11.002.

Yetimoglu, T., Salbas, O., 2003. A study on shear strength of sands reinforced with randomly distributed discrete fibers. Geotextiles and Geomembranes, pp. 103–110. Doi:10.1016/S0266- 1144(03)00003-7.

How to Cite

“Improving the Bearing Capacity of Clay Soil Using Plastic Bottle Waste” (2024) Journal of Engineering, 30(02), pp. 118–127. doi:10.31026/j.eng.2024.02.08.

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