Philippe BRANCHU and Laurent EISENLOHR Philippe BRANCHU and Laurent EISENLOHR Scientific and Technical network of French ministry for infrastucture Environmental risk management of the reuse of non-conventional materials in road construction: application to contaminated soils Pôle RST Laborat oire Régiona l de l’Ouest Parisie
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Philippe BRANCHU and Laurent EISENLOHR Scientific and Technical network of French ministry for infrastucture Environmental risk management of the reuse.
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Philippe BRANCHU and Laurent EISENLOHR
Philippe BRANCHU and Laurent EISENLOHR
Scientific and Technical network of French ministry for infrastucture
Environmental risk management of the reuse of non-conventional materials
test road as pilot full-scall, numerical simulation, …
SCENARII IN ROAD CONSTRUCTION
System boundaries, dimensions of road
structure, geotechnical and environmental
approaches, …
Environmentally evaluated from the perspective of the
material itself
bniveau imperm éable
Polluant dissous
substratum
Groundwater flow
aq
uifer
Dissolved pollution
=> Validation / restrictions
Intersol’2007 6th International Conference-Exhibition on Soils, Sediments and water Slide 11
VARIOUS SCENARII: REUSE IN ROAD CONSTRUCTION
- Management of water runoff from road construction
- In order to reduce the release of potential pollution material are confined
Recycled fill
Recycled fill
Intersol’2007 6th International Conference-Exhibition on Soils, Sediments and water Slide 12
Variability assessment, a key feature : MSWI example
Magnetic sep.
ferrous metals
Heavy media sep.
non ferrous metals
Recycling Recycling
Maturation and drying
bedMSWI
Road constructio
n
Leaching testLeaching test
landfill
non OK
OK
Quality Assurance
« test road » FULL-SCALE
OK
Interim storage
Geotechnical & Environmental description: MSWI example
Intersol’2007 6th International Conference-Exhibition on Soils, Sediments and water Slide 13
- Geotechnical and materials testing
- environmental testing (leaching test)
CONCLUSION / PERSPECTIVES
Excavated contaminated soils generally landfilled
Large volumes are concerned
Heterogenous material
A similar methodology should be followed for reuse of contaminated excavated soils (with or without cleanup) in road even if mechanical features are not so good
embankment, landscaping, …
Need for: - specific platform on clean-up sites
- gathering platform for excavated soils
Intersol’2007 6th International Conference-Exhibition on Soils, Sediments and water Slide 14