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The recycled port
Date:2/9/2011

mand for natural resources, such as blasted rock; and by treating the sediments in situ and using them in port areas, the need for transport is reduced, along with the associated health risks."

Supported by funding from EUREKA member countries, the project partners conducted tests in a pilot project to identify the most suitable binder composition and ideal mixing procedure for a variety of contaminants and sediment types. Researchers observed the behaviour of the treated sediment for leakage, permeability, strength and durability. The binder they used was a mixture of cement and a Merox product, Merit 5000, a derivative from the steel-making process. The slag is able to bind heavy metals chemically at the same time as it cures.

Putting it to the test

The final step of the project translated the results into a report and guidelines for port authorities, to enable them to assess options for using stabilisation and solidification and select the best binder for their local conditions, while providing design principles for using treated sediments in harbour structures, such as paved areas, loading zones and buildings.

The STABCON test site was the Swedish port of Oxelsund, itself a partner in the project. The port wanted to build a new harbour area, and needed to remove contaminated sediment while at the same time respecting Sweden's strict environmental regulations.

Its aim was to dredge a section of harbour and treat the sediment for use in the new land area.

The team dredged about 500 cubic metres of soft sediment, and strengthened it with a mix of cement and Merit 5000. They placed the composition on gravel and sand, and studied its properties, taking samples and conducting laboratory tests for leakage, including in nearby waters. The results were impressive. Once stabilised, there was no degradation from a chemical point of view, and no physical damage either.

The new material also passed the test fo
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Contact: Piotr Pogorzelski
piotr.pogorzelski@eurekanetwork.org
322-777-0979
EUREKA
Source:Eurekalert

Page: 1 2 3

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