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Compressibility Characteristics of Open Dumped Municipal Solid Waste in the Dry Zone of Sri Lanka

Authors:

N. H. Priyankara ,

University of Ruhuna, LK
About N. H.

Senior Lecturer, Department of Civil and
Environmental Engineering

 

CEng, MIE(SL), B.Sc.Eng.(Hons)(Moratuwa), M.Eng.(AIT), Ph.D.(Tohoku),
MSLGS

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K. A. S. N. Fernando,

State Engineering Corporation, LK
About K. A. S. N.

Civil Engineer

 

AMIE (SL), BSc. (Eng Hons) (Ruhuna)

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A. M. N. Alagiyawanna

University of Ruhuna, LK
About A. M. N.

Senior Lecturer, Department of Civil and
Environmental Engineering

 

CEng, MIE(SL), B.Sc.Eng.(Hons) (Moratuwa), M.Eng.(AIT), Ph.D.(Nagaoka), MSLGS

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Abstract

Primary compression is known to be the major component in the settlement mechanism of Municipal Solid Waste (MSW). Presented in this paper are results obtained using a modified large-scale oedometer describing the primary compression characteristics of MSW dumped at the Hambantota open dump site in Sri Lanka. Samples from varying depths were extracted from the dump site to evaluate the compressibility characteristics of MSW in order to expand the existing dump site to landfill. The dumping area was divided into two categories corresponding to the age of the fill. Compressibility and composition of old (10 years) and new (2 years) waste showed similar characteristics. One-dimensional confined compression tests were conducted for shredded MSW recompacted at field densities. The compression index Cc was observed to vary from 0.15 to 0.27. However, after normalization by the initial void ratio eo, the modified compression index Ccvaried in a narrow band between 0.08 and 0.11, signifying that Ccis the more suitable parameter to predict primary consolidation settlement of solid waste dump sites.

How to Cite: Priyankara, N.H., Fernando, K.A.S.N. and Alagiyawanna, A.M.N., 2022. Compressibility Characteristics of Open Dumped Municipal Solid Waste in the Dry Zone of Sri Lanka. Engineer: Journal of the Institution of Engineers, Sri Lanka, 55(3), pp.11–20. DOI: http://doi.org/10.4038/engineer.v55i3.7517
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Published on 08 Nov 2022.
Peer Reviewed

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