Design and construction of a mineral barrier layer involve many experimental and technological aspects. A specific soil water content and laboratory compaction energy, which are required to obtain permeability values according to the national regulation in force, must be determined. It is also necessary to control water content, compaction energy, and permeability of the liner actually compacted in situ. This paper shows how a compacted mineral barrier mainly composed of silty clay soil (the excavated soil is a natural but potentially re-usable waste product) was put in place to cover a large municipal solid waste (MSW) landfill and compacted using a heavy dumper, capable of achieving an adequate compaction degree. The in situ hydraulic properties of the liner were compared with those obtained by laboratory testing and to the limits imposed by the Italian regulation. The actual compaction degree was checked by in situ tests. Hydraulic conductivity tests were carried out in situ, using Boutwell and Guelph permeameters, and in the laboratory using rigid wall and flexible wall permeameters. In situ testing provided more realistic permeability values than laboratory ones and demonstrated that the actual construction procedure used was effective to obtain the design targets.

Design and construction of a compacted clay liner in cover system of a municipal solid waste (MSW) landfill using nonstandard procedures / Moraci, N; Busana, S; Cortellazzo, G; Favaretti, M; Mandaglio, Mc; Schepis, M. - In: CANADIAN GEOTECHNICAL JOURNAL. - ISSN 0008-3674. - 55:8(2018), pp. 1182-1192. [10.1139/cgj-2017-0371]

Design and construction of a compacted clay liner in cover system of a municipal solid waste (MSW) landfill using nonstandard procedures

Moraci N
;
Mandaglio MC;
2018-01-01

Abstract

Design and construction of a mineral barrier layer involve many experimental and technological aspects. A specific soil water content and laboratory compaction energy, which are required to obtain permeability values according to the national regulation in force, must be determined. It is also necessary to control water content, compaction energy, and permeability of the liner actually compacted in situ. This paper shows how a compacted mineral barrier mainly composed of silty clay soil (the excavated soil is a natural but potentially re-usable waste product) was put in place to cover a large municipal solid waste (MSW) landfill and compacted using a heavy dumper, capable of achieving an adequate compaction degree. The in situ hydraulic properties of the liner were compared with those obtained by laboratory testing and to the limits imposed by the Italian regulation. The actual compaction degree was checked by in situ tests. Hydraulic conductivity tests were carried out in situ, using Boutwell and Guelph permeameters, and in the laboratory using rigid wall and flexible wall permeameters. In situ testing provided more realistic permeability values than laboratory ones and demonstrated that the actual construction procedure used was effective to obtain the design targets.
2018
municipal solid waste (MSW) landfill, cover system, silty clay, compaction, hydraulic conductivity.
File in questo prodotto:
File Dimensione Formato  
Moraci_2018_CGJ_Design_NRC Research Press.pdf

non disponibili

Descrizione: Versione editoriale
Tipologia: Versione Editoriale (PDF)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 4.06 MB
Formato Adobe PDF
4.06 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Moraci_2018_CGJ_Design_POST.pdf

non disponibili

Descrizione: POST PRINT
Tipologia: Documento in Post-print
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 9.18 MB
Formato Adobe PDF
9.18 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/3041
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 11
social impact