Le Onze Residence
CHRYSO
The yard
The Le Eleven residence in Chartres is a set of 12 housing units built in compliance with the E+C approach (label created to help combat climate change for new construction), short circuits in favour of the circular economy with a maintenance of the balance of costs. This eco-responsible project was led by FIB (Federation of Concrete Industry) and CERIB (Centre d'Etudes et de Recherches de l'Industrie du Béton). Date of implementation: 2020
Technical solutions
The main issue of this project is the use of local materials to develop the circular economy. CHRYSO has brought new adjuvantation solutions for the use of local sands and recycled aggregates in concrete manufacturing, in conjunction with the eco-responsible approach of this site. The structural concretes used are made up of 30% Recycled Concrete Granulats from old buildings in the city of Chartres, whether ready-to-use concrete or prefabricated concrete products such as pre-walls, concrete blocks and stairs. The casting of the concrete slab, composed of 100% recycled Concrete Granulats, required the development of a specific formulation. In total, 80 tonnes of recycled Concrete Granulats were recovered through this project. For prefabricated elements (pre-walls and stairways), the issue was the use of local clay sands (0/4 SMBP) with high absorbance and an addition of 8% recycled aggregates (4/10), the legislation not allowing to go further. The concrete thus produced had to be of fluid consistency for 45 minutes, with mechanical performance greater than 15 MPa.
Carbon economy
This project, which is 100% supported by CHRYSO, thanks to the CHRYSO®Quad and CHRYSO®Enviromix technologies, has resulted in a 20% reduction in carbon impact compared to a conventional operation (i.e. 360 tonnes of C02 saved), and the E2C1 label (Label buildings with positive energy and low carbon footprint).
















