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BIND-AMOR: Reuse of Dredged Sediments as Supplementary Cementitious Materials
In the Port of Antwerp, 500.000 tonnes dry matter base (DM) of sediments need to be dredged each year to ensure the navigability of the waterways. Traditionally, these maintenance dredged sediments were disposed in settling ponds or underwater cells. However, due to near exhaustion of the existing storage capacity as well as the limited availability of new storage sites, an alternative, sustainable solution needed to be developed. Between 2008 and 2011, the state-of-the-art treatment and storage facility AMORAS was realised by the Flemish Government represented by the Department of Mobility and Public Works (MOW), division Maritime Access. Since 2011, the AMORAS-installation treats up to 600.000 ton DM of sediments annually by mechanical dewatering with membrane filter presses. Pre-treatment steps include sand separation (63 µm cut-off hydrocyclones) and lime addition to enhance flocculation. The produced fine grained (< 63 µm) filter cakes have a dry matter content of minimally 60 %, resulting in a significant volume decrease of the sediments as well as physical properties suitable for storage in an onsite landfill. To increase the operational lifetime of the storage facility, reuse of the non-contaminated filter cakes was considered. A strict separation between highly and marginally contaminated sediments is maintained throughout the process. Furthermore, the sediments are homogenized in different steps, resulting in a continuous supply of homogeneous filter cakes with a good environmental quality. As such, the fine fraction filter cakes of AMORAS are uniquely suited for valorisation.
In the ongoing BIND-AMOR project, the potential of the filter cakes for the production of supplementary cementitious materials (SCMs) is investigated. The project is executed under the authority of the Flemish Government (MOW) by VITO (Flemish Institute for Technological Research), KU Leuven and FLSmidth.
BIND-AMOR: Reuse of Dredged Sediments as Supplementary Cementitious Materials
In the Port of Antwerp, 500.000 tonnes dry matter base (DM) of sediments need to be dredged each year to ensure the navigability of the waterways. Traditionally, these maintenance dredged sediments were disposed in settling ponds or underwater cells. However, due to near exhaustion of the existing storage capacity as well as the limited availability of new storage sites, an alternative, sustainable solution needed to be developed. Between 2008 and 2011, the state-of-the-art treatment and storage facility AMORAS was realised by the Flemish Government represented by the Department of Mobility and Public Works (MOW), division Maritime Access. Since 2011, the AMORAS-installation treats up to 600.000 ton DM of sediments annually by mechanical dewatering with membrane filter presses. Pre-treatment steps include sand separation (63 µm cut-off hydrocyclones) and lime addition to enhance flocculation. The produced fine grained (< 63 µm) filter cakes have a dry matter content of minimally 60 %, resulting in a significant volume decrease of the sediments as well as physical properties suitable for storage in an onsite landfill. To increase the operational lifetime of the storage facility, reuse of the non-contaminated filter cakes was considered. A strict separation between highly and marginally contaminated sediments is maintained throughout the process. Furthermore, the sediments are homogenized in different steps, resulting in a continuous supply of homogeneous filter cakes with a good environmental quality. As such, the fine fraction filter cakes of AMORAS are uniquely suited for valorisation.
In the ongoing BIND-AMOR project, the potential of the filter cakes for the production of supplementary cementitious materials (SCMs) is investigated. The project is executed under the authority of the Flemish Government (MOW) by VITO (Flemish Institute for Technological Research), KU Leuven and FLSmidth.
BIND-AMOR: Reuse of Dredged Sediments as Supplementary Cementitious Materials
RILEM Bookseries
Scrivener, Karen (editor) / Favier, Aurélie (editor) / Horckmans, Liesbeth (author) / Snellings, Ruben (author) / Nielsen, Peter (author) / Dierckx, Philippe (author) / Dockx, Joris (author) / Vandekeybus, Jos (author) / Cizer, Özlem (author) / Vandewalle, Lucie (author)
2015-05-08
2 pages
Article/Chapter (Book)
Electronic Resource
English
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