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A platform for research: civil engineering, architecture and urbanism
Dewatered and Decontaminated Disposal of Dredged Sediments Using Geotextile Bags, Containers and Tubes
The use of geotextile bags, containers and tubes has progressed over the past 30-years from sand filling to the dewatering of river and harbour sediments and, as described in this paper, to the decontamination of those sediments when they are polluted. Unfortunately, such pollution is the case for approximately 5% of sediments dredged annually in the United States. After reviewing the enormity of the situation, various classifications of geotextile flexible forming systems are presented. A performance test, called the pillow test, is described and used in the evaluation of flocculants which are included to efficiently dewater fine grained silt and clay sediments. Such flocculants are critical so as to minimize the negative effects of filter cake build-up on the inside of the geotextile forming systems. The paper then addresses several decontamination possibilities aimed at encapsulating the contaminants within the dewatered sediments allowing for nonpolluted effluent removal. In this regard, examples of the efficiency of charcoal are presented along with estimated costs.
Dewatered and Decontaminated Disposal of Dredged Sediments Using Geotextile Bags, Containers and Tubes
The use of geotextile bags, containers and tubes has progressed over the past 30-years from sand filling to the dewatering of river and harbour sediments and, as described in this paper, to the decontamination of those sediments when they are polluted. Unfortunately, such pollution is the case for approximately 5% of sediments dredged annually in the United States. After reviewing the enormity of the situation, various classifications of geotextile flexible forming systems are presented. A performance test, called the pillow test, is described and used in the evaluation of flocculants which are included to efficiently dewater fine grained silt and clay sediments. Such flocculants are critical so as to minimize the negative effects of filter cake build-up on the inside of the geotextile forming systems. The paper then addresses several decontamination possibilities aimed at encapsulating the contaminants within the dewatered sediments allowing for nonpolluted effluent removal. In this regard, examples of the efficiency of charcoal are presented along with estimated costs.
Dewatered and Decontaminated Disposal of Dredged Sediments Using Geotextile Bags, Containers and Tubes
Koerner, G.R. (author) / Koerner, R.M. (author) / Huang, W. (author)
2013
10 Seiten, Bilder, Tabellen, Quellen
Conference paper
Storage medium
English
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