Shear strength characteristics of mechanically biologically treated municipal solid waste (MBT-MSW) from Bangalore

Journal Article · Fri May 15 00:00:00 EDT 2015 · Waste Management

DOI:https://doi.org/10.1016/J.WASMAN.2015.02.013· OSTI ID:22470236

Sivakumar Babu, G.L., E-mail: [e-mail] ^[1]; Lakshmikanthan, P., E-mail: [e-mail] ^[2]; Santhosh, L.G., E-mail: [e-mail] ^[2]

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1. Department of Civil Engineering, Indian Institute of Science, Bangalore 560012 (India)
2. Centre for Sustainable Technologies (CST), Indian Institute of Science, Bangalore 560012 (India)

Highlights: • Shear strength properties of mechanically biologically treated municipal solid waste. • Effect of unit weight and particle size on the shear strength of waste. • Effect of particle size on the strength properties. • Stiffness ratio and the strength ratio of MSW. - Abstract: Strength and stiffness properties of municipal solid waste (MSW) are important in landfill design. This paper presents the results of comprehensive testing of shear strength properties of mechanically biologically treated municipal solid waste (MBT-MSW) in laboratory. Changes in shear strength of MSW as a function of unit weight and particle size were investigated by performing laboratory studies on the MSW collected from Mavallipura landfill site in Bangalore. Direct shear tests, small scale and large scale consolidated undrained and drained triaxial tests were conducted on reconstituted compost reject MSW samples. The triaxial test results showed that the MSW samples exhibited a strain-hardening behaviour and the strength of MSW increased with increase in unit weight. Consolidated drained tests showed that the mobilized shear strength of the MSW increased by 40% for a unit weight increase from 7.3 kN/m{sup 3} to 10.3 kN/m{sup 3} at 20% strain levels. The mobilized cohesion and friction angle ranged from 5 to 9 kPa and 8° to 33° corresponding to a strain level of 20%. The consolidated undrained tests exhibited reduced friction angle values compared to the consolidated drained tests. The friction angle increased with increase in the unit weight from 8° to 55° in the consolidated undrained tests. Minor variations were found in the cohesion values. Relationships for strength and stiffness of MSW in terms of strength and stiffness ratios are developed and discussed. The stiffness ratio and the strength ratio of MSW were found to be 10 and 0.43.

• OSTI ID: 22470236
• Journal Information: Waste Management, Vol. 39; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
COMPOST
MUNICIPAL WASTES
PARTICLE SIZE
SANITARY LANDFILLS
SHEAR PROPERTIES
SOLID WASTES
STRAIN HARDENING
TESTING
WASTE PROCESSING
WEIGHT