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VEGECOL : Road pavement with a plant-based binder for light traffic lanes
The long-term goal of the present project is to replace petroleum-based bitumen (the binder used in asphalt mixes for roadways) with a plant-based binder.
The ABC project is a new building concept based on three pillars: A for autonomous, B for sustainable and intelligent building and C for citizen.
One of the objectives is to reduce the carbon footprint of the construction and operation of this residential building by activating the following levers:
- Use of CO2-reduced concrete and bio-sourced materials
- Energy efficiency through occupant involvement
- Optimisation of the energy efficiency of the building
- 70% autonomy in daily electricity consumption
- Division of the water consumption of the network by 3
- 40% reduction in grey waste
ABC (Autonomous Building for Citizens) is the first autonomous residence concept in France. It was designed entirely by Bouygues Construction’s R&D teams with the architectural firm Valode & Pistre. It is being developed and built by teams from Linkcity (the Group’s property developers) and Bouygues Bâtiment Sud-Est for the city of Grenoble. It was delivered in September 2020. The residents are being helped to reduce their consumption in this new type of housing, as their involvement in the life of the building is a central element of the project.
The autonomy of this building is based on 3 pillars that contribute to reducing the carbon footprint of the residence:
The ABC building aims to be 70% self-sufficient in electricity, to reduce its water consumption by 2/3 compared to a conventional residence (i.e., more than 50L saved per day and per person) and to reduce household waste by 40%. In addition to the resource savings, the reductions in water consumption and waste result in a carbon gain of approximately 40 teqCO2 over the life of the building.
In addition, the carbon footprint of the construction is also reduced using concrete with reduced CO2 emissions. In particular, the use of low-carbon CEM IV concrete has reduced the CO2 that would have been emitted by conventional concrete (i.e., CEM II/A) by more than a third, 270 teqCO2.
The housing complex consists of two buildings, representing a built area of 5000 m², with 62 flats (42 intermediate rental flats and 20 social rental flats). The ABC (Autonomous Building for Citizens) demonstrator, France’s first autonomous residence, won a prize at the BatiActu Construction Awards in September 2020. It was delivered in Grenoble in summer 2020 by teams from Linkcity and Bouygues Bâtiment Sud-Est.
The project received a mention at the “Green Solutions Awards 2020-2021” in the “Grand Prix Quartier Durable” category.
on which the project has a significant impact
Scope 1 : Construction site emissions (e.g., transport of materials).
Quantification : Marginal. Scope 3 represents more than 95% of the average carbon footprint of our projects.
Scope 2 : Construction site emissions (electricity consumption).
Quantification : Marginal. Scope 3 accounts for more than 95% of the carbon footprint of our project.
Scope 3 :
Quantification :
– More than 1000 tCO2e over the entire life of the building (50 years) compared to a “conventional” new housing building, including:
The values considered for the calculation are taken from the E+C- studies.
Over its lifetime, the ABC concept demonstrator will save more than 1000 tCO2e compared to a “conventional” new housing building. This considers both material and operational energy savings.
The benchmark is based on a sample of 11 concrete housing buildings in an equivalent climate zone in Grenoble.
Confidential
01/07/2018 - End : 01/06/2020
Grenoble, Isère.
In addition to reducing greenhouse gas emissions, this project will:
The concept of autonomy makes it possible to be free of infrastructure and networks. This is of major interest in areas:
The climate impact will be even more important as the country’s energy mix is carbon-based.
Developed by Bouygues Construction’s R&D.
Project owner : Linkcity
Designers : Bouygues Bâtiment Sud-Est, Architect Valode et Pistre. Suez (design of the water management system).
Other partners: Vicat (low-carbon concrete). Saint-Gobain (bio-sourced insulation). City of Grenoble, Auvergne Rhône-Alpes Region, French Government (Future Investment Programme); Banque des Territoires, ADEME, Grenoble Habitat, Innovia, GEG, Grenoble Alpes Métropole
presse@bouygues-construction.com
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