...A. Norris; J. Scalia IV; C. D. Shackelford The hydraulic conductivity (k) of specimens of enhanced-bentonite geosynthetic clay liners (EB-GCLs) comprising anionic polymers permeated with two concentrated salt solutions, 500 mM NaCl and 167 mM CaCl₂, was measured to determine...

...Q. Wang; A. Bouazza; H. Xie This paper examines the gas flow performance of needle-punched geosynthetic clay liners (GCLs) overlap seams over a range of gravimetric moisture content, including the effect of vertical stress and unevenness of the overlaps. The gas permeability of the GCL overlapped...

...Y. Lu; H. Abuel-Naga; E.-C. Leong This study aims to assess the effect of pore water salinity (sodium chloride (NaCL) solution) on the consolidation behaviour of GCLs (geosynthetic clay liners) using one-dimensional oedometer test apparatus. The experiments include two testing conditions: (1...

... of geosynthetic clay liners (GCLs) and how these effects may influence observed bentonite hydraulic performance. SEM images revealed that changes to the natural micro-textures of bentonite were due to interaction with acidic leachate, the effects being greater with increased concentration. It was observed from...

...A. Bouazza; M. A. Rouf; R. M. Singh; R. K. Rowe; W. P. Gates Gas diffusion and gas permeability tests were performed sequentially on powder and granular partially hydrated needle-punched geosynthetic clay liners (GCLs) over a range of gravimetric water content using a gas flow unified measurement...

...M. A. Rouf; A. Bouazza; R. M. Singh; W. P. Gates; R. K. Rowe Super-saturated salt solutions are used to control relative humidity (RH) and to infer the hydration (water uptake and loss) behaviour of three needle-punched geosynthetic clay liners (GCLs) with respect to time under conditions of both...

...F. Mazzieri; G.Di Emidio ABSTRACT: Dense prehydrated geosynthetic clay liners (DPH-GCLs) are a particular type of GCL which, unlike conventional GCLs manufactured with dry bentonite, contain bentonite prehydrated during manufacturing. DPH-GCLs are produced by a patented process that includes...

...W.A. Take; R.W.I. Brachman; R.K. Rowe ABSTRACT: Manufacturers of geosynthetic liner materials recommend that composite geomembrane/geosynthetic clay liners (GCLs) be covered in a timely fashion to avoid potential issues that may arise under the action of long-term solar exposure. In this paper...

...R.K. Rowe; A. Verge ABSTRACT: The risk of geosynthetic clay liner (GCL) desiccation in low stress applications such as solar ponds was investigated using a fully coupled thermo-hydro-mechanical model. Parameters were developed and verified by comparison with previously reported laboratory data...

...J.M. Southen; R.K. Rowe ABSTRACT: A fully coupled model is used to simulate the results of large-scale laboratory tests that investigated the non-isothermal behaviour of geosynthetic clay liners in landfill basal liner applications. Results of numerical simulations of the laboratory tests in terms...

... in Section 2 of this paper. Geosynthetics Geosynthetic clay liners Bentonite Permeability to gas Unsaturated Suction Thanks to their low permeability to water and gases, geosynthetic clay liners (GCLs) are often used in municipal solid waste landfill (MSWL) applications, combined...

...J. Frankovská; S. Andrejkovičová; I. Janotka ABSTRACT: Sodium bentonite (Na-bentonite) is used as a sealing component in geosynthetic clay liners (GCL). Na-bentonite is very sensitive to chlorides, and flocculation occurs when it is exposed to saline environments. The purpose of this work...

...A. Bouazza; T. Vangpaisal The migration of gas through a geomembrane overlying a geosynthetic clay liner in a composite landfill cover is primarily a result of the flow through defects in the geomembrane. The nature of the contact conditions between the GCL and the geomembrane is of paramount...

...A. Bouazza; T. Vangpaisal Manufacturing defects in a needle-punched geosynthetic clay liner (GCL) may include variation of mass per unit area of the bentonite, uneven thickness of the GCL, poor bonding of the composite components (geotextile/bentonite/geotextile) and, in some cases, a poor...

...K. Lange; R. K. Rowe; H. Jamieson The leaching of hazardous metals and metalloids from mine tailings is a significant problem facing the mining industry. Although, in the past, geosynthetic clay liners (GCLs) have primarily been employed as leachate barriers in landfills, recent times have seen...

...R. K. Rowe; R. W. I. Brachman The equivalence of composite liners involving a geomembrane (GM) and a compacted clay liner (CCL) to alternative composite liners with a geomembrane, geosynthetic clay liner (GCL) and attenuation layer (AL) is assessed in terms of the contaminant impact occurring...

...T. D. Stark; H. Choi; R. Akhtarshad Since the introduction of geosynthetic clay liners (GCLs) to waste containment facilities, one of the major concerns about their use has been the hydraulic equivalence to a compacted clay liner as required by regulations. Laboratory test results and more recently...

...R.M. Koerner; H.L. Bowman; G.R. Koerner; M.A. Eberlé Presented in this paper is the out-of-plane tensile behavior of a variety of geosynthetic clay liners (GCLs). Tensile response curves indicate that GCL strength is largely dependent on the carrier material types from which the GCL is manufactured...

...D.B. Narejo; G.Q. Memon The free swell of three commercially available geosynthetic clay liners is evaluated using the Geosynthetic Research Institute test method GCL 1. Leachate from three Pennsylvania municipal solid waste landfills is used in the test procedure. It is seen that the swelling...