Regards croisés sur l'intérêt et les apports de la démarche ACV dans le domaine de la construction

Transcription

1 Journée de conférences Regards croisés sur l'intérêt et les apports de la démarche ACV dans le domaine de la construction Une organisation du Laboratoire de Génie Chimique (ULg), parrainée par le pôle de compétitivité Greenwin

2 Avec le soutien de :

3 Les apports de la démarche d'analyse du Cycle de Vie dans le domaine de la construction 22 mars Liège Un exemple concret: Le matériau de construction béton Bernard Mathieu Global Environmental Sustainability HeidelbergCement

4 Concrete the most used building material in the world global production 11 km³ 2200 m 2200 m

5 No 1 in aggregates No 3 in cement No 4 in ready mixed concrete Filiales en Belgique Cement & grinding plants Aggregates employees, 40 countries, 2500 sites 25/03/ :18 3

6 Cement / concrete from raw materials to final product Usine de Lixhe Fondée en 1950, 224 collaborateurs Production annuelle : 1,4 million de tonnes de clinker 1,6 million de tonnes de ciment

7 Major environmental challenges for the cement sector Sustainable access to local mineral resources Reduction of climate change impact Positioning in a more sustainable construction sector BIODIVERSITY MANAGEMENT CO 2 EMISSIONS SUSTAINABLE CONSTRUCTION Resource efficiency + other environmental impacts WASTE AS A RESOURCE OTHER EMISSIONS, WATER

8 From construction to sustainable construction Reducing all impacts on nature Using & Maintaining Construction Deconstruction Manufacturing Recycling Closing the life cycle of our products

9 Market drivers for responsible sourcing Green Public Procurement Guidelines o UK target:25% of construction products sustainably sourced Green Rating Systems (LEED, BREEAM) o points for sustainable materials (labelled) Contractors and developers looking for responsibly sourced products (e.g. Skanska zero unsustainable materials) Other industries / competing materials have RSS Other industries/competing materials communicate EPD s

10 Product related environmental communication General communication on policies, objectives, actions Environmental labels The worst and the best Detailed environmental data related to the delivered products or services (EPD/LCA) Increasing quality of the information

11 General communication on policies, objectives, actions Website, leaflets, SD report

12 Labels a credibility issue International sectoral labels are the most reliable

13 Cement Sustainability Initiative (CSI) 24 member companies Now One third global cement production Two thirds outside of China Joining forces to address global sustainability challenges

14 The CSI is developing a Responsible Sourcing Scheme for Concrete o Holistic approach to promote responsible practices and increase transparency towards the marketplace o Strike balance between credibility and not adding complexity

15 Communication of quantitative environmental data Environmental Product Declaration (EPD) Compliance to standards, sectoral norms!

16 Increasing demand for EPD s for building materials Most visible in North America and Europe. In the US, the building rating scheme LEED is about to adopt additional credits for EPDs in its 2012-version. In Europe, national standards have been developed in France, Germany, Spain and some Nordic countries, and the European Standardization Organization (CEN) has published a standard (EN15804) that will harmonize the methodology used for EPDs for construction products across Europe. More and more projects, particularly public projects, will make EPD a mandatory requirement for all major building materials.

17 Uniform Product Category Rules being developed by associations The European standard EN15804 serves as reference document (PCR for construction products) PCR for cement: CEMBUREAU (EU) is in the process of updating the European PCR to be compliant with EN15804, and the PCA (USA) has issued a draft PCR PCR for concrete: the CSI is working on one common methodology to assess the environmental performance of concrete Goal: develop Product Category Rules (PCR) that would be applicable globally in the same way global reference methodology, which will provide transparency on data for use in building-lca, communicated to the market by associations and/or companies. common calculation tool for individual companies the PCR will be registered under the International EPD System (Environdec) as soon as technically finalized

18 Uniform Product Category Rules being developed by CSI Key issues : Allocation to co-products: Methods differ across the world depending on the waste legislation in place (zero allocation for slag in the US, economic allocation for slag in the EU). The CSI should recommend that EPDs be in line with local best practices. If these cannot be clearly identified then allocation in line with the European standard EN15804, using economic allocation, is recommended. Boundaries for waste: The CSI has so far taken a conservative approach of including all emissions from waste streams (except biomass) in the emissions profile of a product, while providing a break-down of emissions from each of the waste streams. This approach may have to be reviewed, as it does not reflect current practice on this issue in several regions (EU, Japan). Impact Categories: There are differences, mainly between Europe and the US, regarding which impact categories shall be included. Even if the impact category is the same there can be different methodologies to calculate them. Water: Member companies are testing whether data on water can be collected following the rules stated in the PCR, which follow the draft ISO standard, ISO 14046, on net water consumption. The goal is to identify a pragmatic way to meet reporting requirements under ISO-rules with data collected following the CSI key performance indicators (KPIs), which are based on the WBCSD Global Water Tool and GRI methodologies. They differ from the Water Footprint Methodology in how they define water consumption (water withdrawal and discharge being the key issues focused on, from a standpoint of industrial accountability).

19 Calculation tool to help member companies of the CSI prepare cement and concrete EPDs Dashboard for primary data input: guiding the user throughout the data collection process to allow for easy EPD preparation and to calculate the impacts for the 24 impact categories described in the PCR. The tool is expected to produce two major outputs: A type-i declaration in CSI format that will be used for communication and/or sales purposes. The type-i declaration will not necessarily be a validated official EPD, but it will serve as a user-friendly document that contains the main general/background information and the environmental performance (LCA results) of the selected product for all indicators. A background report with the complete set of input data and results for the selected product. This (internal) document will be in the form of a Word and/or Excel file that will contain all the information required to produce an EPD and also for the reviewer to validate it.

20 Never provide EPD s without detailed explanations! Cradle-to-gate approach what counts is the cradle-to-cradle impact of the building An individual producer has NOT all levers of freedom to improve its EPD figures Natural raw materials are what they are Local availability of waste-derived raw materials and fuels are often limited EPD s must be used by professionals!

21 Our actions towards our customers Eco-Responsible services Partnership 1. CO 2 - carbon Calculator First objective is to decrease the carbon footprint Carbon offsetting is proposed to compensate unavoidable emissions 2. LCA study Improve environmental performance of the product and the process 3. Cradle to Cradle - Managing the waste of our customers 4. Cradle to cradle - Use of recycled aggregates 5. Developing new products 6. EMS - ISO Biodiversity 8. Special projects 9. Workshops / trainings in sustainable construction

22 CO2 - carbon calculator

23 LCA studies are proposed to our customers Possibility to certify the results in an EPD External Communication Improve the env. performance of the product and the process More heating and less cement or the other way around Measure the impact of using green electricity/ship/ Achieve corporate env. objectives.

24 Carbon offsetting CO 2 emission reduction CO 2 credits

25 La première piste cyclable zéro CO2 Inaugurée le 2/10/2010, à Maastricht L empreinte CO 2 a été calculée par nos soins = 195t CO2e HC a acquis 200 VCUs d un projet éolien (2.9mW, Tamil Nadu, Inde) CO 2

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30 MERCI!