title: Food waste impact on municipal solid waste angle of internal friction.
abstract: The impact of food waste content on the municipal solid waste (MSW) friction angle was studied. Using reconstituted fresh MSW specimens with different food waste content (0%, 40%, 58%, and 80%), 48 small-scale (100-mm-diameter) direct shear tests and 12 large-scale (430 mm × 430 mm) direct shear tests were performed. A stress-controlled large-scale direct shear test device allowing approximately 170-mm sample horizontal displacement was designed and used. At both testing scales, the mobilized internal friction angle of MSW decreased considerably as food waste content increased. As food waste content increased from 0% to 40% and from 40% to 80%, the mobilized internal friction angles (estimated using the mobilized peak (ultimate) shear strengths of the small-scale direct shear tests) decreased from 39° to 31° and from 31° to 7°, respectively, while those of large-scale tests decreased from 36° to 26° and from 26° to 15°, respectively. Most friction angle measurements produced in this study fell within the range of those previously reported for MSW.
authors.affiliation: Department of Environmental Engineering Sciences, University of Florida, P.O. Box 116450, Gainesville, FL 32611-6450, USA. youngmcho@ufl.edu
authors.forename: Young Min
authors.initials: YM
authors.lastname: Cho
authors.forename: Jae Hac
authors.initials: JH
authors.lastname: Ko
authors.forename: Liqun
authors.initials: L
authors.lastname: Chi
authors.forename: Timothy G
authors.initials: TG
authors.lastname: Townsend
mesh_terms: D002947:Cities; D017276:Friction; D005735:Garbage; D033081:Shear Strength; D014866:Waste Products / Q000032:analysis / Q000706:statistics & numerical data
chemical_list: D014866:Waste Products