Embed Size (px)
Citation preview
1
Chaire génie civil écoconstruction
LCM2017 CONFERENCE
3-6 September 2017
Luxembourg, Luxembourg
Can LCA tool alone conduct environmental performances of circular economy in construction sector? A case study of cement concrete
demolition waste (CCDW) management. Poster ID: 192
Marjan Mousavi, PhD student in Civil Engineering and Eco constructionUniversity of Nantes Director: Anne Ventura Co-director: Nicolas Antheaume
Case study
2
Surface course
Base course
Subbase course
Subgrade
Pavement: bound layers
Foundations:unbound layers
Concrete waste
Inert landfillingScenario 1: landfilling
Scenario 2: recycling
System boundary
Quarry process
High quality natural aggregates
Low quality natural aggregates
1-Quarry process
2-Road construction
6-Concrete waste recycling
3-Foundations
5- Landfill
LCA Model, System expansion
Recycled concrete
Concrete wastes4- Concrete waste
management
nat. aggregates
Replaced nat. aggregates
7
Concrete wastes
1-Quarry process
2-Road construction
6-Concrete waste recycling
3-Foundations
5- Landfill
Modified LCA Model by considering multi-outputs quarry process
Recycled concrete
Concrete wastes4- Concrete waste
management
High quality nat. aggregates
Replaced low quality nat. aggregates
7
Concrete wastes
1-Quarry process
2-Road construction
6-Concrete waste recycling
3-Foundations
5- Landfill
Modified LCA Model by considering market for high quality natural aggregates
Recycled concrete
Concrete wastes4- Concrete waste
management
2-Cementconcrete1-
Bitumen concrete 8-Tunnel and
Bridge construction
7-Building construction
High quality nat. aggregates
High quality nat. aggregates
low quality nat. aggregates
7
Concrete wastes
1-Quarry process
2-Road construction
6-Concrete waste recycling
3-Foundations
5- Landfill
Modified LCA Model by considering market for low quality natural aggregates
Demanded Recycled concrete
Concrete wastes4- Concrete waste
management
2-Cementconcrete1-
Bitumen concrete 8-Tunnel and
Bridge construction
7-Building construction
Demanded low quality nat. aggregates
High quality nat. aggregates
High quality nat. aggregates
3- Low quality
aggregate
low quality aggregates
7
Concrete wastes
1-Quarry process
2-Road construction
6-Concrete waste recycling
3-Foundations
5- Landfill
Modified LCA Model by considering stocks
Demanded Recycled concrete
Concrete wastes
4- Concrete waste management
2-Cementconcrete1-
Bitumen concrete 8-Tunnel and
Bridge construction
7-Building construction
Demanded low quality nat. aggregates
High quality nat. aggregates
High quality nat. aggregates
3- Low quality
aggregate
low quality aggregates
2
Demolition of buildings,Tunnels,
Bridges
1
low quality nat. aggregates
37
Conclusion
8
LCA MFAEconomic Model
Expanded system
Local Markets
Dynamic Stock
Models
Work is under progress!
Perspectives
Studying different scenarios:
o Increased landfilling fees
o Setting recycling thresholds
o Etc.
9
