Circular economy of buildings: Leroy Merlin case study...2019/12/02 · • Leroy Merlin Douai...
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1 Circular economy of buildings: Leroy Merlin case study Sylvie Groslambert (ULiège, Chemical Engineering, BE) [email protected]
Transcript of Circular economy of buildings: Leroy Merlin case study...2019/12/02 · • Leroy Merlin Douai...
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Circular economy of buildings:Leroy Merlin case study
Sylvie Groslambert (ULiège, Chemical Engineering, BE)[email protected]
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Context:
Building and construction sector: 1/3 of global resource consumption
Construction & demolition waste (CDW)
o EU: CDW = largest waste stream (1/3 of all EU waste)
o ~ 20% of total waste in Belgium
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Context:
Building and construction sector: 1/3 of global resource consumption
Construction & demolition waste (CDW)
o EU: CDW = largest waste stream (1/3 of all EU waste)
o ~ 20% of total waste in Belgium (40% in the world)
Circular EconomyRecycling
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Context:
CDW (Construction & Demolition Waste): mostly not recycled
Causes:
o heterogeneity
o dispersion
o economic viability
o (policy / inconsistencies, discrepancies)
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VALDEM project:
AVEC LE SOUTIEN DU FONDS EUROPÉEN DE DÉVELOPPEMENT RÉGIONALMET STEUN VAN HET EUROPEES FONDS VOOR REGIONALE ONTWIKKELING
Co-founders:
General information:http://www.valdem-interreg.eu/
VALDEM aims to improve demolition waste treatment to reach a circular economy in North of France and Wallonia (BE)
(and Vlanderen, BE)
(01.07.2016 – 4 years)
Life Cycle Assessment (MT3 – A4)
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Coordination & legislative survey
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• Demolition of Leroy Merlin store of Douai (59, FR)
• Recycling of the "waste" (recycled aggregates, RA)
• Construction of the new store in Tourcoing/Neuville-en-Ferrain (59, FR) substitution of a part of natural aggregates (NA) in the concrete slab
• Valorization of all the fractions
o 4-20 mm in concrete (Eqiom)
o 0-4 mm in pavement (EtNISI)• https://www.youtube.com/watch?v=2IRb7PDcI_4
Leroy Merlin The story of a recycled concrete
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Goal
• To assess the environmental impact of the substitution of a part of natural aggregates by recycled aggregates in the case of the demolition-construction of Leroy Merlin store in the Hauts de France
Scope
• FU: 1 m³ of concrete
• Cradle-to-gate (comparative) LCA
• 2 scenarii : 100% NA 20 RA + 80% NA (= RA20)
• Boundaries: raw materials, transport, production
Goal and Scope
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1. RA
• Production
excavation on-site transport crushing
• Adaptation of generic entries to the French case
Inventory
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1. RA
• Leroy Merlin Douai demolition: 3100 tonnes of RA
o 4-20 mm: 1700 tonnes: 200 tonnes to Wambrechies1500 tonnes to Roost-Warendin
o 0-4 mm: 1400 tonnes to Recynov - Santes
• Transport
o 4-20 mm: transport to Eqiom concrete plants
• Wambrechies, 50 km ( Leroy Merlin Tourcoing)
• Roost-Warendin, 4 km ( other projects)
o 0-4 mm: transport to Recynov site, Santes, 39 km
• EtNISI in pavement
Inventory
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2. NA (4-20 mm); sand (0-4 mm)
• Production: adaptation of generic entries to the Belgian case (Gaurain quarry, BE)
• Transport distances: 55 km (Eqiom), 47 km (Recynov, Santes)
3. Concrete
• Eqiom formulation: adaptation of generic entry(concrete, sole plate and foundation, + FR)
Inventory
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LCA Results – FU = 1 m³ Concrete, WambrechiesSimapro 9.0; Ecoinvent 3.5; CML-IA 3.05
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Abiotic depletion Abiotic depletion(fossil fuels)
Global warming(GWP100a)
Ozone layerdepletion (ODP)
Photochemicaloxidation
Acidification Eutrophication
%
Wambrechies - NA Wambrechies - RA20
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LCA Results – FU = 1 m³ Concrete, WambrechiesSimapro 9.0; Ecoinvent 3.5; CML-IA 3.05
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NA RA20 NA RA20 NA RA20 NA RA20 NA RA20 NA RA20 NA RA20
Abiotic depletion Abiotic depletion(fossil fuels)
Global warming(GWP100a)
Ozone layerdepletion (ODP)
Photochemicaloxidation
Acidification Eutrophication
%
Cement, Portland Sand Sand
NA Gravel RA Douai Water
Diesel, burned in building machine Electricity, medium voltage {FR} Heat
Heat, cogen Lubricating oil Synthetic rubber
Transport, CEM Transport, sand (water) Transport, sand
Transport, NA Transport, RA Municipal solid waste {FR}
Waste concrete
60%
92.5%
75%
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LCA Results – NA / RA production and transportSimapro 9.0; Ecoinvent 3.5; CML-IA 3.05
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Abiotic depletion Abiotic depletion(fossil fuels)
Global warming(GWP100a)
Ozone layerdepletion (ODP)
Photochemicaloxidation
Acidification Eutrophication
%
Wambrechies - NA Wambrechies - RA Roost - NA Roost - RA Recynoc - NA Recynov - RA
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• Substitution of 20% of NA with RA in concrete
No significant impact difference on 1 m³ of concretebecause cement in the most impacting element
• NA / RA production and transport
GWP100a: gain depending on distance between the demolition and the valorization sites
• Recynov - Santes: 1 kg CO2 eq / tonne
• Eqiom - Wambrechies: 1.6 kg CO2 eq / tonne
• Eqiom - Roost: 5.7 kg CO2 eq / tonne
Conclusions
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• Gain for the construction of the new store in Tourcoing/Neuville-en-Ferrain : 322 kg CO2 eq
• Global gain if total reuse of the 3100 t of RA (0-4 and 4-20 mm): 10400 kg CO2 eq
• 4-20 mm RA: 8500 m³ of concrete
• EtNISI pavement: to be continued...
Conclusions
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Take home message
The valorization of the demolition wastefrom Leroy Merlin Douai store
provides a significant environmental gain compared to the use of natural aggregates only
Let's get circular !
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Acknowledgment:This work is part of the research project VALDEM (Convention n° 1.1.57 of Interreg France – Wallonie -Vlaanderen 2014-2020) partly financed by the European Regional Development Funds, and Wallonia.
Dr Hervé BREQUELR&D [email protected]: 0032.69.88.42.66
AVEC LE SOUTIEN DU FONDS EUROPÉEN DE DÉVELOPPEMENT RÉGIONALMET STEUN VAN HET EUROPEES FONDS VOOR REGIONALE ONTWIKKELING
VALDEM’s Team
Contact:
http://www.valdem-interreg.eu/
