1 / 14

Importance and Challenges of Module D in Sustainable Construction

Explore the significance and challenges of Module D in sustainable construction based on a case study analysis. Identify the main materials contributing to Module D and address difficulties, data gaps, assumptions, and methodological issues.

lhurd
Download Presentation

Importance and Challenges of Module D in Sustainable Construction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Sustainable construction, Belgian Building Research Institute (BBRI), lde@bbri.be Laetitia DELEM, Lisa WASTIELS Module D in the building life cycle: significance based on a case study analysis

  2. Module D? • EN 15978/15804: Building life cycle = modules A, B, C • Materials for recycling/reuse/ energyrecovery: • Impacts of transport/wasteprocessing up to EOW (e.g. transport, processing) →Module A, B, C End of Waste (EOW) • Waste framework directive: • Commonly used for specific purpose • Fulfils the technical requirements for that purpose • Market demand • use will not lead to adverse environmental/health effects

  3. Module D • Potentialbenefits and loadsbeyond EOW? → module D (additional, optional information) • Benefitfromavoidedprimary production • Loads: E.g. furtherprocessing/transport up to the point wheresecondaryresource replaces primaryresources (=point of functionalequivalence) End of Waste (EOW)

  4. Objective • Module D not oftencalculated (optionaluntilnow) • Based on a case study, get an insight in • The relative importance of module D • Main materialscontributing to module D • Identifydifficulties, data-gaps, assumptions and methodological issues related to the calculation of module D → “The practical use of module D in a building case study: assumptions, limitations and methodological issues” SBE19, Graaz (september 2019)

  5. Case study 3-4 level building appartement (+-2000m2, 25 appartments) • Others: • Reinforcedconcretecore for the innerstaircase and lift • Metalstair structure outdoor • Basement: • precastconcretewalls 22-30cm • 10cm XPS • Hollowconcrete block walls (9cm)

  6. Case study • Alternatives withvaryingloadbearing structures • Sand-lime bricks • hollow concrete blocks • concrete skeleton + infill with hollow concrete blocks • wooden skeleton • CLT (cross laminated timber) • Finishingmaterialswerekeptequal (e.g. façade covering in ETICS, Bricks, windows in PVC) • Similarenergyconsumption for heating (373000MJ gas /year)

  7. Methodology • RSP=60 years • C2g impact of all materials, excl. kitchen, bathroom, technical installations. • Generic data (ecoinvent v3,3 cut-off system model) • Scenarios representative of Belgium • Incineration • wasteincinceration • benefitfrom • heatrecovery: 0,2MJ heat (gas)/MJ LHV • electricity production: 0,1 MJ/MJ LHV

  8. Methodology

  9. Results

  10. Results Main contributors to module D of the sand-lime brick building Benefit= avoided impact fromprimarysteel production (blast oxygenfurnace) Load=secondarysteel production (electric arc furnace)

  11. Results Main contributors to module D of the wood skeleton building

  12. Conclusions • Relative importance of module D compared to total life cycle impact (excl. B6)

  13. Conclusions Building case study, usinggeneric data and Belgian EOL scenarios • The contribution of Module D can besignificant(up to ±50% of total life cycle impact (incl. or excluding B6) • varies more according to the indicatorconsideredthan to the building variant • Module D can result in net impactsratherthanbenefits (e.g. Human toxicity) • Relative contribution of materialsisstronglyinfluenced by avoidedprimary production • Module D isbased on manyassumptionswhich can have a significant impact on the results!

  14. Laetitia Delem lde@bbri.be 1179

More Related