LIFE09 ENV/FI/575 ABSOILS In West Harbour, in Helsinki, the dredged sediments were disposed to stabilization pools, mixed with binders by mass stabilization and then transported to final utilization sites - e.g., noise embankments and landscaping purposes. The stabilisation works in this site in 2011 and 2012 have allowed for the utilisation of about 110 000m 3 of dredged sediments for the construction purposes. If not the project piloting, they would have to be deposited to landfill. The use of mass stabilization method allows for the processing of low quality and polluted sediments into construction materials. Remarkable cost savings could be achieved by replacing part of cement with binders based on fly ash in the stabilization. The stabilization/ solidification binds also contaminants effectively to a low-leaching state. The stabilization technology requires technical and environmental material tests in the laboratory before the launch of construction works and follow- up studies afterward. Also an active quality control in all stages of work is indispensable. SUSTAINABLE SEDIMENT MANAGEMENT AT THE CITY OF HELSINKI – FROM LOW-QUALITY SOILS INTO CONSTRUCTION MATERIALS NOORA LINDROOS 1 , JUHA FORSMAN 1 , KATA KREFT-BURMAN 1 , EMMA NIEMELÄINEN 2 , JUHA SORVALI 2 , VELI-PEKKA PERTTINÄ 2 , MIKKO SUOMINEN 2 , HANNU HALKOLA 2 , SATU-PIA REINIKAINEN 3 , EEVA JERNSTRÖM 3 , HELI SIRÉN 3 1 Ramboll Finland Oy, 2 City of Helsinki, STARA/HKR, 3 LUT Lappeenranta University of Technology Stabilisation Pools in West Harbour in Helsinki. Ongoing Mass Stabilisation. Principle of Mass Stabilisation. In the City of Helsinki in Finland mass stabilization technology has been applied to improve the technical properties of the dredged sediment in order to utilize the material in construction. Fly ash from coal combustion has also been used as binder for the stabilisation. Jätkäsaari I and II pilots in the West Harbour in Helsinki are part of the five-year ABSOILS project which demonstrates the utilization of surplus and low-quality soils as construction materials. It is co- financed by the EU LIFE+ Environmental Policy & Governance programme (LIFE09 ENV/FI/000575). Pilot III will be implemented in 2014. http://projektit.ramboll.fi/life/absoils
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LIFE09 ENV/FI/575 ABSOILS
In West Harbour, in Helsinki, the dredged sediments were disposed to stabilization pools, mixed with binders by mass stabilization and then transported to fi nal utilization sites - e.g., noise embankments and landscaping purposes. The stabilisation works in this site in 2011 and 2012 have allowed for the utilisation of about 110 000m3 of dredged sediments for the construction purposes. If not the project piloting, they would have to be deposited to landfi ll.
The use of mass stabilization method allows for the processing of low quality and polluted sediments into construction materials. Remarkable cost savings could be achieved by replacing part of cement with binders based on fl y ash in the stabilization. The stabilization/solidifi cation binds also contaminants eff ectively to a low-leaching state.
The stabilization technology requires technical and environmental material tests in the laboratory before the launch of construction works and follow-up studies afterward. Also an active quality control in all stages of work is indispensable.
SUSTAINABLE SEDIMENT MANAGEMENT AT THE CITY OF HELSINKI – FROM LOW-QUALITY SOILS INTO CONSTRUCTION MATERIALS
NOORA LINDROOS1, JUHA FORSMAN1, KATA KREFT-BURMAN1, EMMA NIEMELÄINEN2, JUHA SORVALI2, VELI-PEKKA PERTTINÄ2, MIKKO SUOMINEN2, HANNU HALKOLA2, SATU-PIA REINIKAINEN3, EEVA JERNSTRÖM3, HELI SIRÉN3
1Ramboll Finland Oy, 2City of Helsinki, STARA/HKR, 3LUT Lappeenranta University of Technology
Stabilisation Pools in West Harbour in Helsinki.
Ongoing Mass Stabilisation.
Principle of Mass Stabilisation.
In the City of Helsinki in Finland mass stabilization technology has been applied to improve the technical properties of the dredged sediment in order to utilize the material in construction. Fly ash from coal combustion has also been used as binder for the stabilisation.
Jätkäsaari I and II pilots in the West Harbour in Helsinki are part of the fi ve-year ABSOILS project which demonstrates the utilization of surplus and low-quality soils as construction materials. It is co-fi nanced by the EU LIFE+ Environmental Policy & Governance programme (LIFE09 ENV/FI/000575). Pilot III will be implemented in 2014. http://projektit.ramboll.fi /life/absoils
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