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Slurry walls for control of contaminant migration a comparison of UK and US practices
In both the UK and the US, low permeability, vertical barriers are widely used in environmental control systems designed and constructed for the control of contaminant migration from contaminated sites. In the US, soil-bentonite slurry wall technology is the predominant technology of choice for the construction of these low permeability barriers for environmental applications. In contrast, cement-bentonite slurry wall technology is the most widely employed technique in the UK. The paper presents an examination, comparison, and assessment of each of these practices. Explanations for the reasons of national preference of one technology over the other are explored. It is believed the leading reason for the continued use of the selected technique is the confidence and experience base built up over the years in the respective countries. Also explored is the question of whether or not it is reasonable for increased use of soil-bentonite technology in the UK and cement-bentonite technology in the US. It is concluded that there are no major barriers for the adoption, where appropriate, of both soil-bentonite and cement-bentonite technologies by both the UK and the US. For the UK to adopt soil-bentonite technology, it would be necessary to revise the draft national specification that suggests minimum unconfined shear strength be specified. For the US, the inclusion of slag in the traditional cement-bentonite mixtures would be required for the adoption of this technology.
Slurry walls for control of contaminant migration a comparison of UK and US practices
In both the UK and the US, low permeability, vertical barriers are widely used in environmental control systems designed and constructed for the control of contaminant migration from contaminated sites. In the US, soil-bentonite slurry wall technology is the predominant technology of choice for the construction of these low permeability barriers for environmental applications. In contrast, cement-bentonite slurry wall technology is the most widely employed technique in the UK. The paper presents an examination, comparison, and assessment of each of these practices. Explanations for the reasons of national preference of one technology over the other are explored. It is believed the leading reason for the continued use of the selected technique is the confidence and experience base built up over the years in the respective countries. Also explored is the question of whether or not it is reasonable for increased use of soil-bentonite technology in the UK and cement-bentonite technology in the US. It is concluded that there are no major barriers for the adoption, where appropriate, of both soil-bentonite and cement-bentonite technologies by both the UK and the US. For the UK to adopt soil-bentonite technology, it would be necessary to revise the draft national specification that suggests minimum unconfined shear strength be specified. For the US, the inclusion of slag in the traditional cement-bentonite mixtures would be required for the adoption of this technology.
Slurry walls for control of contaminant migration a comparison of UK and US practices
Evans, J.C. (author) / Dawson, A.R. (author)
1999
16 Seiten, 32 Quellen
Conference paper
English
| British Library Conference Proceedings | 1999
| British Library Online Contents | 2001
| British Library Conference Proceedings | 1999
| TIBKAT | 1979