Create a demonstrator of circular economy practices at the scale of an ecodistrict

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Terms of the action or commitment

The aim is to integrate the concept of circular economy in the development of the eco-district from inception. Eiffage planned actions throughout the various phases of the eco-district works, from site clearance, through the demolition phase, and up to the construction phases.

1. Eiffage Aménagement will schedule early on the selective deconstruction of buildings to improve the recovery of deposited materials and products. The association Réavie will oversee the deconstruction and recovery of materials and products which are grouped together on an experimental reuse platform: the “Solid’R” platform. The latter will allow materials and products to be grouped together, refurbished and sold if they are not reused on site.

2. The project aims to reuse 100% of the demolition material and rubble on site via a crushing operation that will produce recycled aggregates. The new buildings will therefore be constructed using recycled concrete and incorporate other less carbon-intensive materials (notably novel concretes). These actions aim to enhance the valuation of local resources while taking a global approach to reducing carbon emissions. Eiffage ambitions to achieve the E3C1 grade of the Carbon-Energy Label for the whole eco-district.

Levers mobilized for circular economy (according to Ademe)

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Implementation timeline

Starting year


Ending year


Main actors mobilized

Internal actors

Sustainable Development and Transversal Innovation department, Eiffage Construction, Development and Infrastructure (Eiffage Civil Engineering)

External actors

Chatenay-Malabry City Hall, Réavie association, Châtenay-Malabry Parc-Centrale semi-public company (SEMOP)

Geographic area

Chatenay-Malabry (La Vallée Eco-district), Hauts-de-Seine

Photo / Video

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2022 follow-up of the action

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Date of follow-up

June 2022

Methods of validation of the follow-up


Status of the action

In progress


a) Results


Partially achieved

Not achieved

b) Numerical / Qualitative information



Comparison with the projected pace in the last publications

Keeping up with the times

In advance


Partial / Final results
The E3S collaborative project is currently producing concrete walls and posts integrating 100% recycled aggregates which has obtained an ATEx (a temporary product approval for experimental use within a construction project) granted by the CSTB (Building’s Technical and Scientific Centre).

In addition, Eiffage Immobilier has included the Châtenay works with the “Reuse Booster”, intending to integrate reused elements in its construction program.
Company's comments
The E3S is joint effort led by Eiffage Group and the future University Gustave Eiffel and benefits from the “I-SITE FUTURE” grant which is part of the national Future Investments Program. The latter regroups the University Paris-Est Marne-La-Vallée, IFSTTAR, ESIEE, ENSG Géomatique, EIVP and the Paris-Est School of City and Territory Architecture

Company's others commitments :