Proceedings of the Deep Mixing 2015 Conference, (DFI)
Stabilization of Materials - Upgrading of Soils and Sediments to Be Used in Geo-Constructions
G÷ran Holm, Swedish Geotechnical Institute, Sweden; Josef Macsik, Ecoloop, Sweden; Gregory Makusa, Luleň University of Technology, Sweden; Helene Kennedy, Swedish Geotechnical Institute, Sweden; Yvonne Rogbeck, Swedish Geotechnical Institute, Sweden
Constructions activities in cities often imply large volumes of surplus material which could be treated by stabilization for re-use in new geotechnical constructions. Modification of dredged sediments by e.g. stabilization/solidification (s/s) is an example of sustainable handling option implying dredged contaminated sediments to become a potential resource for civil engineering constructions. The SMOCS project (Sustainable Management of Contaminated Sediments) within the Baltic Sea Region Programme 2007-2013 has developed a guideline based on a sustainability approach free to download at www.smocs.eu. The paper presents key issues in the guideline and highlights the importance of performing a field test as part of the design process. Two field tests with s/s-treated dredged sediments for new port areas are presented. Strength, permeability and leakage properties of s/s-treated contaminated sediments make beneficial use in geo-constructions possible. The influence of possible physical/chemical deterioration processes on the durability has been studied showing that freeze/thaw cycles might degrade the monolith of s/s-treated sediments. Consequently s/s-constructions shall be below freezing depth. Other deterioration processes such as salt and sulfate penetration were found of minor importance. Research is on-going to study the influence of and how to cope with freeze/thaw cycles on the long-term properties.
|article #2062; publication #1013 (DM-2015)|