Granular Soil Bearing Capacity Improvement Using Waste Plastic Materials

Document Type : Research Article


Civil Engineering Department, Islamic Azad University, Hamedan Branch, Hamedan, Iran


Reinforcement is the improvement of total resistance with reinforcing materials (with suitable performance in tension) in soil (with fairly compressive strength and weakness in tension). In the recent years, there have been numerous studies on the application of reinforced soil and bearing capacity of granular soils. Generally, it has been seen that studies are limited to reinforced embankment by geosynthetics and metal stripes and pulleys or even plastic parts and wastes so using plastic waste in embankment has not been considered. Therefore, in this research the effect of using plastic wastes to improve bearing capacity of granular soils has been investigated. The variables are using one type of disposal plastic wastes in different weight percentages in irregular (random) reinforcement and regular reinforcement (with specified layers) in granular embankment. The research was carried out in small laboratory scale using CBR. According to results, placing plastic waste parts in sandy soil increases the bearing capacity remarkably. The optimum values were obtained at 2-2.5 weight percent of plastic parts to sand and also the required energy conditions to attain optimum percentage were examined. In this regard, the strain-stress behavior of soil was studied. The results showed that increasing weight percentage of plastic parts to 2-2.5 in the condition of irregular and regular distribution, respectively, raises the soil elasticity coefficient to 234 and 152%.


Main Subjects

[1] P. Poor noori, M. Hajisotode, improve soil resistance behavior using waste material,1 conference of soil mechanics and foundation engineering, Shahid Rejaei University, Tehran, Iran, (2014) (In Persion).
[2] M. Makarchian, J. Eliasi, Investigation on the Effect of Geotextiles on Pavement Bearing Capacity(Part 1: Experimental Studies), Amirkabir J. Civil Eng. 45(1) 2013, 15-26 (In Persion).
[3] G.S. Babu, S.K Chouksey,.. Stress–strain response of plastic waste mixed soil. Waste management, (31)3 (2011), 481-488.
[4] A.K. Choudhary, J.N. Jha & K.S. Gill,. A study on CBR behavior of waste plastic strip reinforced soil. Emirates journal for engineering research, 15(1) (2010) 51-57
[5] N.C. Consoli, J.P. Montardo, P.D.M. Prietto & Pasa,G.S., Engineering behavior of a sand reinforced with plastic
waste. Journal of Geotechnical and Geoenvironmental Engineering, 128(6) (2002) 462-472.
[6] R.K. Dutaa & V.K. Sarda,. CBR behavior of waste plastic strip-reinforced stone dust/fl y ash overlying saturated clay. Turkish Journal of Engineering and Environmental Sciences, 31(3) (2007) 171-182.
[7] A. Fauzi, Z. Djauhari, U.J. Fauzi, Soil Engineering Properties Improvement by Utilization of Cut Waste Plastic and Crushed Waste Glass as Additive. International Journal of Engineering and Technology, 8(1) (2016)15.
[8] D. Kalumba, F.C.Chebet, Utilization of polyethylene plastic shopping bags waste for soil improvement in sandy soils. Proc. 18th ICSMGE,(2013).
[9] Y.T. Kim, H.J. Kim, G.H. Lee, Mechanical behavior of lightweight soil reinforced with waste fishing net. Geotextiles and Geomembranes, 26(6) (2008) 512-518.
[10] A.S. Muntohar, A. Widianti, E. Hartono & W.Diana, Engineering properties of silty soil stabilized with lime and rice husk ash and reinforced with waste plastic fber. Journal of Materials in Civil Engineering, 25(9) (2012) 1260-1270.
[11] T. Ochi, S. Okubo & K. Fukui, Development of recycled PET fber and its application as concretereinforcing fber. Cement and Concrete Composites, 29(6) (2007) 448-455.
[12] G. Ranjan, R.M. Vasan & H.D.Charan, Behavior of plastic-fiber-reinforced sand. Geotextiles and Geomembranes, 13(8) (1994) 555-565.
[13] K. Sobhan & M. Mashnad, Tensile strength and toughness of soil-cement-fl y-ash composite reinforced with recycled high-density polyethylene strips. Journal of Materials in Civil Engineering, 14(2) (2002) 177-184.
[14] C. Tang, B. Shi, W. Gao, F. Chen, & Y. Cai, Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil. Geotextiles and Geomembranes, 25(3) (2007) 194-202.
[15] C.H. Benson and M.U. Khire, Reinforcing sand with strips of reclaimed high-density polyethylene. Proc. ASCE Journal of Geotechnical Engineering, 121(4) (1994) 838-855.