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A first for Bouygues Bâtiment Grand Ouest
On the Ilot Adam site, located in the new République district of the Ile de Nantes, the first concretes made with H-UKR N cement from Hoffman Green Cement Technologies were poured in January and will be completed in March. The experiment concerns approximately 42 m3 of walls and floors of the 39-unit building, which represents a gain of 4 tons of CO2 compared to traditional cement. When the formwork was removed, the teams discovered a green/blue concrete which, after a few days of oxidation, became creamy white. The tests are continuing on the two office buildings with the installation of the "Chambord" prefabricated straight flight staircases also containing H-UKR N cement. On these prefabricated staircases, 10 tons of CO2 will also be saved. In total, between the walls, floors and stairs made of H-UKR N, the equivalent of 14 round trips by plane from Paris to New York for one person will be saved!
On the Ilot Adam site, located in the new République district of the Ile de Nantes, the first concretes made with H-UKR N cement from Hoffman Green Cement Technologies were poured in January and will be completed in March. The experiment concerns approximately 42 m3 of walls and floors of the 39-unit building, which represents a gain of 4 tons of CO2 compared to traditional cement. When the formwork was removed, the teams discovered a green/blue concrete which, after a few days of oxidation, became creamy white. The tests are continuing on the two office buildings with the installation of the "Chambord" prefabricated straight flight staircases also containing H-UKR N cement. On these prefabricated staircases, 10 tons of CO2 will also be saved. In total, between the walls, floors and stairs made of H-UKR N, the equivalent of 14 round trips by plane from Paris to New York for one person will be saved!
After Ilot Adam, the experimentation continued with the casting of a floor and a sail on the site of the Physical Medicine and Rehabilitation Center (CMPR) of the Saint-Jacques Hospital, before a more extensive use next September on the inclusive residence of Noisetiers, in Angers.
Focus H-UKR
H-UKR is a cement with 0% clinker, manufactured cold using industrial co-products and activators from the chemical industry. With its absence of clinker, this cement has a carbon footprint divided by 3 compared to a traditional cement.
Decarbonizing our business by acting now on our projects
These various experiments are in line with the Group's decarbonisation strategy, which is illustrated at Bouygues Bâtiment Grand Ouest by several actions, including reducing the carbon footprint of our concretes.
In 2022, the widespread use of the Scanbéton tool on Bouygues Bâtiment Grand Ouest worksites enabled us to know where we were starting from. With a report on the quantities of concrete formulas actually used, we can now automate the actual calculation of the concrete carbon weight of our sites.
For example, from January to the end of December 2022, ScanBéton calculates an average quantity of 204.12 KgCO2/m3 of concrete poured. To reach our carbon reduction objective (-30%), we must quickly reach 170 kg of CO2 /m3 on our sites and then go beyond this threshold.
The road is marked out and we are committed to it! To be continued!
These various experiments are in line with the Group's decarbonisation strategy, which is illustrated at Bouygues Bâtiment Grand Ouest by several actions, including reducing the carbon footprint of our concretes.
In 2022, the widespread use of the Scanbéton tool on Bouygues Bâtiment Grand Ouest worksites enabled us to know where we were starting from. With a report on the quantities of concrete formulas actually used, we can now automate the actual calculation of the concrete carbon weight of our sites.
For example, from January to the end of December 2022, ScanBéton calculates an average quantity of 204.12 KgCO2/m3 of concrete poured. To reach our carbon reduction objective (-30%), we must quickly reach 170 kg of CO2 /m3 on our sites and then go beyond this threshold.
The road is marked out and we are committed to it! To be continued!
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