Towards a model for circular renovation of the existing building … · 2019. 10. 8. · Pittau F.,...
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| | Institute of Construction & Infrastructure Management Chair for Sustainable Construction Dept. of Civil, Environmental & Geomatic Engineering Francesco Pittau, Giuliana Iannaccone, Gabriele Lumia, Guillaume Habert [email protected] 08.10.19 1 Towards a model for circular renovation of the existing building stock: a preliminary study on the potential for CO 2 reduction of bio-based insulation materials Pittau F., Iannaccone G., Lumia G., Habert G.
Transcript of Towards a model for circular renovation of the existing building … · 2019. 10. 8. · Pittau F.,...
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
Francesco Pittau, Giuliana Iannaccone, Gabriele Lumia, Guillaume Habert
08.10.19 1
Towards a model for circular renovation of the existing building stock: a preliminary study on the potential for CO2 reduction of bio-based insulation materials
Pittau F., Iannaccone G., Lumia G., Habert G.
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19 2
Global fossil carbon emisisons
Source: IPCC Special Report on Global Warming of 1.5°C (2018)
Reduction of fossilemissions is notsufficient to achieve2050 targets
Negative carbon technologies for CO2removal are urgentlyneeded!
Pittau F., Iannaccone G., Lumia G., Habert G.
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19 3
2nd step: promote carbon removal technologies
CRITICAL ISSUES:
• Technologies are not ready
• Costs way too high (at the moment)
• Space limited (afforestation related issue)Pittau F., Iannaccone G., Lumia G., Habert G.
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19 4
Alternative: carbon storage in buildings
Building materials storage
ADVANTAGES:
• Biobased technologies are already available in the market
• Costs are competitive compared to traditional systems (non biobased)
• We have a large demand of construction materials all over the world
Pittau F., Iannaccone G., Lumia G., Habert G.
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19 5
Evolution of the Built Environment in the World
Source: Smith et al. Nature (2016)
Ex: 38.1 Bm2
New: + 18.8 Bm2
Ex: 19.3 Bm2
New: + 23.8 Bm2
Ex: 18.0 Bm2
New: + 38.0 Bm2
Ex: 29.8 Bm2
New: + 7.1 Bm2
Ex: 9.8 Bm2
New: + 5.1 Bm2
Ex: 57.2 Bm2
New: + 27.4 Bm2
Ex: 9.8 Bm2
New: + 1.3 Bm2
Ex: 2.1 Bm2
New: + 1.3 Bm2
Ex: 15.6 Bm2
New: + 16.7 Bm2
Ex: 15.8 Bm2
New: + 41.8 Bm2
Ex: 8.0 Bm2
New: + 10.0 Bm2
Building renovation is a Western problem!
Pittau F., Iannaccone G., Lumia G., Habert G.
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19 6
Building renovation in EU
Sce: Pittau et al. 2018
Pittau F., Iannaccone G., Lumia G., Habert G.
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 7
Carbon negative bio-based technologies for renovation
Standard ETICS system Bio-based (fast-growing) systems
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 8
Bio-based technologies for renovation
I-joist frame with pressed
straw
Timber frame with injected hempcrete
Timber frame with mineral insulation
Hempcrete block
external insulation
Expanded polystyrene
external insulation
SYNBIOBIOBIO MIN + BIO
OFF SITE PREASSEMBLED ON SITE ASSEMBLED
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 9
Methodology: MFA + DLCA based model
Model
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 10
System boundaries
(EN 15804:2012)
1Landfill(DS 1)
2Energy recovery
(DS 2)
3Recycling
(DS 3)
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 11
End of life and waste treatment scenarios
Pittau F., Krause F., Lumia G., Habert G. 2018. Retrofit as a carbon sink: the carbon storage potentials of the EU housing stock. Journal of Cleaner Production, 214, 365-376
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 12
Critical issues of IPCC assessment method
• Biogenic carbon emissions are not taken into account in the GWP.
• Emissions are all considered as impulse at time 0 and GWP evaluated at time fixed time
horizon (usually 100 years).
• Timing of emissions is not accounted for.
• Carbon storage in products and uptake are not included in the boundaries (no benefits).
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 13
Dynamic LCA principles
∆" # $% &'(%) *+,-'./0
Environmentalmodelling
Steady-state assumptions
Dynamic resolution
X kg of GHG
Impact = Y Impact = f(t)
Positive emissions Negative emissions
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 14
Results – Cumulative GHG emissions
EPS TIM HCF HCB STR
||Institute of Construction & Infrastructure ManagementChair for Sustainable ConstructionDept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 15
Sensitivity of the results
EPS TIM HCF HCB STR
1%
Renovation rate:
2% 4%60y 40y 30y
RBSL:
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Institute of Construction & Infrastructure ManagementChair for Sustainable Construction
Dept. of Civil, Environmental & Geomatic Engineering
08.10.19Pittau F., Iannaccone G., Lumia G., Habert G. 16
Final remarks and conclusions
à Building renovation in EU-28 is urgently needed and impacts from material
production - mainly insulation - is not negligible and can slow down the transition to
zero carbon society.
à Bio-based materials can contribute to remove carbon from the atmosphere and its
large use in construction due to additional insulation required for existing facades is a
valuable opportunity that should not be wasted.
à Fast-growing materials, such as straw, hemp, etc., regrow fast in the crops and,
contrarily to wood, are able to provide the carbon sequestration in a very short time.
Thank you very much for your attention!
