The factors that may affect short-term leakage through composite liners are examined. It is shown that the leakage through composite liners is only a very small fraction of that expected for either...

Short- and long-term leakage through composite liners. The 7th Arthur Casagrande Lecture1 1This lecture was presented at the 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, Toronto, Ont., October 2011, and a pre-print appeared in the conference proceedings.

The performance of four sections of a full-scale embankment constructed on soft soil is examined using a fully coupled and fully three-dimensional finite element analysis. The four sections had sim...

Three-dimensional finite element modelling of a full-scale geosynthetic-reinforced, pile-supported embankment

Three-dimensional numerical analysis of a DCM column-supported highway embankment

Feasibility study on the application of coal gangue as landfill liner material.

Hydraulic performance of geosynthetic clay liners to sulfuric acid solutions

The variation in length of the longest hydraulic features (connected wrinkles) formed in an exposed black high-density polyethylene (HDPE) geomembrane liner observed at different times of the day a...

Field study of wrinkles in a geomembrane at a composite liner test site

A test cover comprised of three different needle-punched geosynthetic clay liner (GCL) products and covered with up to 1 m of cover soil (gravelly sand) was built over arsenic-rich tailings at a former gold mine in Nova Scotia, Canada, to evaluate the performance of the GCLs under local climatic conditions Of the GCLs examined, one had untreated and two had polymer-enhanced natural sodium bentonite The three GCLs each had different carriers: one with a woven geotextile, one with a scrim-reinforced nonwoven geotextile, and one with a woven geotextile laminated with a polypropylene film At some locations, each type of GCL was placed in direct contact with the tailings At other locations, each GCL was separated from the tailings by 015 m of cover soil Samples of each GCL, tailings, and cover soil were recovered 1 and 2 years after construction Tests show that the GCL with untreated bentonite maintained a low hydraulic conductivity (≤5 × 10−11 m/s) at locations where there was ≥07 m of cover soil abov

Changes in geosynthetic clay liner (GCL) properties after 2 years in a cover over arsenic-rich tailings

This study investigates the performance of bentonite components of geosynthetic clay liners (GCLs) when exposed to aggressive leachates using the fluid loss test and provides a possible quick metho...

Fluid loss as a quick method to evaluate hydraulic conductivity of geosynthetic clay liners under acidic conditions

A numerical model to predict biologically induced clogging of municipal solid waste leachate collection systems is described. The model simulates the accumulation of clog mass in the porous media by the growth of biomass and precipitation of minerals. In addition, the settling and deposition of suspended particles is modelled. A technique for modelling filter-separator layers between the waste and the coarse granular drainage material is described. The application of the model is illustrated for two series of laboratory mesocosm experiments: one where the waste was in direct contact with the underlying drainage layer and the second where there was a granular filter between the waste and the coarse gravel drainage layer. The modelling shows that the clogging of the gravel in the lower regions of the saturated drainage layer is estimated better by the advanced numerical model than the previously published model. In both cases, the calculated results are in encouraging agreement with the observed behaviour. ...

RoweR. Kerry

Papers

Short- and long-term leakage through composite liners. The 7th Arthur Casagrande Lecture1 1This lecture was presented at the 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, Toronto, Ont., October 2011, and a pre-print appeared in the conference proceedings.

Field study of wrinkles in a geomembrane at a composite liner test site

Changes in geosynthetic clay liner (GCL) properties after 2 years in a cover over arsenic-rich tailings

Fluid loss as a quick method to evaluate hydraulic conductivity of geosynthetic clay liners under acidic conditions

Modelling leachate-induced clogging of porous media