Evaluation of Fibers Effect on the Shear Strength of Municipal Solid Waste

Document Type : Research Article

Authors

1 Department of civil Engineering, Iran University of Science and Technology, Tehran, Iran

2 Department of Architecture and Art, University of Kashan, Kashan, Iran

Abstract

 In order to evaluate the effect of fiber part in the municipal solid waste on its shear strength, a study was conducted on the Kahrizak waste disposal landfill in Tehran. Shear strength of the waste samples was evaluated through the large-scale tri-axial consolidated and undrained (CU) tests on reconstructed fresh and 9 years old waste specimens. Evaluation and comparison between the results is done on the reconstructed waste samples with a density of 11 kN/m3 in the non-fibrous state and containing the 12%- weighing plastic fibers. To study the fibers effect, three different types of the plastic bags with three ranges of the tensile strength including 7, 16 and 21 Mpa was used that their dimensions is 2.5*8 cm. In the next step these sheets and the waste samples were mixed. The results show that the fiber part of waste material samples is one of the main factors in providing the shear strength of the waste material. As the tensile strength of the fibers increases, the shear strength of the waste masses increases too. As an initial result an increase about 200% in the tensile strength of the fiber, causes an additional tension increase more than 100% in the waste sample. The plastic fibers in the samples caused a reduction in cohesion (C), and increase the internal friction angle (Φ) of the samples that could be seen in the old waste samples more than fresh ones. In addition to the tensile strength, the elasticity and the amount of deformation before the fracture of the fiber part can influence the behavior of the waste mass.

Keywords

Main Subjects

References

[1] N.H. Jafari, T.D. Stark, S.J.I.I.J.o.G.C.H. Merry, The July 10 2000 Payatas landfill slope failure, 2(3) (2013) 208-228 (in persian).
[2] G. Blight, A.J.G. Fourie, G. Engineering, Catastrophe revisited–disastrous flow failures of mine and municipal solid waste, 23(3) (2005) 219-248.
[3] S.M. Merry, E. Kavazanjian Jr, W.U.J.J.o.P.o.c.F. Fritz, Reconnaissance of the July 10, 2000, Payatas landfill failure, 19(2) (2005) 100-107.
[4] O. Stoll, Mechanical properties of milled refuse, in: Proceedings of the ASCE National Water Resources Engineering Meeting, Phoenix, Ariz, 1971, pp. 11-15.
[5] A. Landva, J. Clark, W. Weisner, W. Burwash, Geotechnical engineering and refuse landfills, in: Proceedings of the 6th National Conference on Waste Management in Canada, Vancouver, BC, 1984, pp. 1-37.
[6] S.L. Machado, M.F. Carvalho, O.M.J.J.o.G. Vilar, G. Engineering, Constitutive model for municipal solid waste, 128(11) (2002) 940-951.
[7] S.L. Machado, M. Karimpour-Fard, N. Shariatmadari, M.F. Carvalho, J.C.J.W.m. do Nascimento, Evaluation of the geotechnical properties of MSW in two Brazilian landfills, 30(12) (2010) 2579-2591.
[8] N. Shariatmadari, A. Sadeghpour, F.J.I.J.C.E. Razaghian, Effects of aging on shear strength behavior of municipal solid waste, 12(3) (2014) 226-237. (in persian).
[9] M.K. Fard, N. Shariatmadari, M. Keramati, H.J.J.I.J.C.E. Kalarijani, An experimental investigation on the mechanical behavior of MSW, 12(4) (2014) 292-303.
[10] http://pasmand.tehran.ir/Default.aspx?tabid=41, in, (accessed september, 2016).
[11] N. Shariatmadari, A. Sadeghpour, M.J.I.J.C.E. Mokhtari, Aging effect on physical properties of municipal solid waste at the Kahrizak Landfill, Iran, 13 (2015) 126-136.
[12] A. Mansouri, Field Scale MSW Settlement Evaluation in Warm and Dry Region, Iran University of Science and Technology, 2009(in persisn).
[13] S.H. Jafari Kelarijani, Evaluation the Effect of Orientation and content of Fibrous Material on Shear Strenght Parameters of MSW with DST (Case Study: Kahrizak Landfill(Iran University of Science and Technology, 2010(in persisn).
[14] M. Asadi, Use of Hyperbolic modeling in simulation of DST results in MSW, Iran University of Science and Technology, 2012(in persisn).
[15] K.H. Head, R. Epps, Manual of soil laboratory testing, Pentech Press London, 1980.
[16] M. Grisolia, Q. Napoleoni, P. Sirini, G.J.J.R.M.T. Tancredi, Geotechnical behavior of sanitary landfill based on laboratory and in situ tests, 20(4) (1992) 197-203.
[17] J.C.F. Nascimento, Mechanical Behavior of Municipal Solid Waste, University of Sao Paulo, Sao Carlos, SP, Brazil 2007.
[18] O.M. Vilar, M.J.J.o.T. Carvalhod, Evaluation, Mechanical properties of municipal solid waste, 32(6) (2004) 438-449.
[19] M. Gabr, S.J.G.T.J. Valero, Geotechnical properties of municipal solid waste, 18(2) (1995) 241-251.
[20] B. Caicedo, L. Yamin, E. Giraldo, O. Coronado, N. Soler, Geomechanical properties of municipal solid waste in Dona Juana sanitary landfill, in: Proceedings of the fourth international congress on environmental geotechnics, Brazil, 2002, pp. 177-182.
[21] S.J.H.G.S. Feng, Static and dynamic strength properties of municipal solid waste and stability analyses of landfill, (2005).
[22] K.R. Reddy, H. Hettiarachchi, J. Gangathulasi, J.E.J.W.m. Bogner, Geotechnical properties of municipal solid waste at different phases of biodegradation, 31(11) (2011) 2275-2286.
Amirkabir Journal of Civil Engineering
Volume 50, Issue 3
September and October 2018
Pages 433-444

Files

Share

How to cite

Statistics