Estudo da Compressão Primária de Resíduos Sólidos Urbanos (RSU) Aterrados / Study of the Primary Compression of Grounded Municipal Solid Waste (MSW)

Léa Beatriz Dai-Prá, Graziela Taís Schmitt, Karina Escandiel Crespo, Marcelo Oliveira Caetano, Luciana Paulo Gomes, Alessandra Wirth, Gisele C. S. Silva

Abstract


The monitoring of differential settlements is used to estimate the increased lifecycle of sanitary landfills, to maintain slope stabilization and safety of operations. The research objective was to use the soil mechanics methodology for determining the physical indexes used to calculate the settlement of Municipal Solid Waste (MSW). MSW samples were collected in a landfill in Brazil, at two different depths - Group 1 (0.5 m), Group 2 (0.8 m). Samples had ten years of grounding. Group 1 presented an average moisture content of 121.43%; specific mass of 1.06 ± 0.24 g.cm-³; initial void ratio of 5.73 ± 1.65; final void ratio of 4.10 ± 1.42; and primary compression index (Cc) of 1.26 ± 0.26. Group 2 presented an average moisture content value of 118.66%; specific mass of 1.10 ± 0.4 g.cm-³; initial void ratio of 6.72 ± 3.9; final void ratio of 5.13 ± 3.1; and Cc of 1.32 ± 0.26. No significant differences were identified between the Cc’s of Group 1 and 2, although the different depths. The methodology in this study can be validated, as it shows that soil mechanics characteristics can be applied to MSW, since the results were similar to other studies in the literature.

 

 


Keywords


Municipal Solid Waste, Primary Compression Index, Sanitary landfill, Soil Mechanics, Geotechnics

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DOI: https://doi.org/10.34117/bjdv7n4-401

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