A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Properties of HDPE Geomembrane Exhumed 20 Years After Installation in a Mine Reclamation Cover System
https://orcid.org/http://orcid.org/0000-0002-8044-348X
High-density polyethylene (HDPE) geomembranes (GM) are used in mine site reclamation cover systems to limit water and oxygen ingress into sulphide tailings or waste rocks, thereby reducing acid mine drainage generation. The objective of this paper is to assess the actual properties of small-scale GMs after 20 years of service in the cover system of an existing mine site. GM samples were exhumed from this site and laboratory tested to determine the standard (Std) and high pressure (HP) oxidative-induction times (OITs), tensile properties, and hydraulic and oxygen sorption/diffusion properties. Unfortunately, the initial properties of the virgin GM before the installation were not available. Properties gathered from this study were then compared to literature data or to minimal requirements for virgin HDPE GMs as defined by the Geosynthetic Research Institute (GRI). Results showed Std-OIT values exceeding the minimum requirement of 100 min for virgin GMs while the HP-OIT values are lower than the minimum requirement of 400 min. The tensile properties exceed the requirements. The fluid-tightening properties do not appear to be affected to date: the equivalent hydraulic conductivity is around 10–14 m/s, and the oxygen diffusion coefficient is around 10–13 m2/s. The GMs thus show acceptable performance to date. Further studies will be needed in the future to determine more long-term GM behaviour where the data from this study will constitute reference values (in the absence of initial properties).
Properties of HDPE Geomembrane Exhumed 20 Years After Installation in a Mine Reclamation Cover System
https://orcid.org/http://orcid.org/0000-0002-8044-348X
High-density polyethylene (HDPE) geomembranes (GM) are used in mine site reclamation cover systems to limit water and oxygen ingress into sulphide tailings or waste rocks, thereby reducing acid mine drainage generation. The objective of this paper is to assess the actual properties of small-scale GMs after 20 years of service in the cover system of an existing mine site. GM samples were exhumed from this site and laboratory tested to determine the standard (Std) and high pressure (HP) oxidative-induction times (OITs), tensile properties, and hydraulic and oxygen sorption/diffusion properties. Unfortunately, the initial properties of the virgin GM before the installation were not available. Properties gathered from this study were then compared to literature data or to minimal requirements for virgin HDPE GMs as defined by the Geosynthetic Research Institute (GRI). Results showed Std-OIT values exceeding the minimum requirement of 100 min for virgin GMs while the HP-OIT values are lower than the minimum requirement of 400 min. The tensile properties exceed the requirements. The fluid-tightening properties do not appear to be affected to date: the equivalent hydraulic conductivity is around 10–14 m/s, and the oxygen diffusion coefficient is around 10–13 m2/s. The GMs thus show acceptable performance to date. Further studies will be needed in the future to determine more long-term GM behaviour where the data from this study will constitute reference values (in the absence of initial properties).
Properties of HDPE Geomembrane Exhumed 20 Years After Installation in a Mine Reclamation Cover System
https://orcid.org/http://orcid.org/0000-0002-8044-348X
High-density polyethylene (HDPE) geomembranes (GM) are used in mine site reclamation cover systems to limit water and oxygen ingress into sulphide tailings or waste rocks, thereby reducing acid mine drainage generation. The objective of this paper is to assess the actual properties of small-scale GMs after 20 years of service in the cover system of an existing mine site. GM samples were exhumed from this site and laboratory tested to determine the standard (Std) and high pressure (HP) oxidative-induction times (OITs), tensile properties, and hydraulic and oxygen sorption/diffusion properties. Unfortunately, the initial properties of the virgin GM before the installation were not available. Properties gathered from this study were then compared to literature data or to minimal requirements for virgin HDPE GMs as defined by the Geosynthetic Research Institute (GRI). Results showed Std-OIT values exceeding the minimum requirement of 100 min for virgin GMs while the HP-OIT values are lower than the minimum requirement of 400 min. The tensile properties exceed the requirements. The fluid-tightening properties do not appear to be affected to date: the equivalent hydraulic conductivity is around 10–14 m/s, and the oxygen diffusion coefficient is around 10–13 m2/s. The GMs thus show acceptable performance to date. Further studies will be needed in the future to determine more long-term GM behaviour where the data from this study will constitute reference values (in the absence of initial properties).
Properties of HDPE Geomembrane Exhumed 20 Years After Installation in a Mine Reclamation Cover System
Int. J. of Geosynth. and Ground Eng.
Rarison, Ramanambelina Faneva Mamambina (author) / Mbonimpa, Mamert (author) / Bussière, Bruno (author) / Pouliot, Sandra (author)
2023-02-01
Article (Journal)
Electronic Resource
English
Permeation of organic pollutants through a 14 year old field-exhumed HDPE geomembrane
| British Library Conference Proceedings | 2002
Properties of exhumed HDPE field waves
| Online Contents | 1999
Properties of exhumed HDPE field waves
| Tema Archive | 1999
HDPE & VLDPE Geomembrane Survivability
| British Library Conference Proceedings | 1993