Cemex participates in project to cleanse the Seine River in Paris

Historically, part of the wastewater was discharged directly into the Seine. Now, in the event of rainfall, rainwater is transferred to the Austerlitz Basin through concrete underground tunnels and two collector wells, where it is temporarily stored to prevent overflows into the river. Once collected in the basin – a structure the size of a dozen Olympic swimming pools – the wastewater is transported via a tunnel beneath the train station to a treatment plant and gradually returned to the Seine.

"We are proud to participate in this ambitious infrastructure project that will help prevent wastewater discharge from reaching the River Seine,” said José Antonio Cabrera, President of Cemex Europe, Middle East & Africa. “Cemex remains at the forefront of developing building materials for large-scale projects, contributing to a positive impact in urban areas such as Paris."

The Austerlitz storage basin is a massive cylindrical structure measuring 50 metres in diameter and over 30 metres deep, with a capacity to store more than 50 000 m³ of water. Cemex supplied 30 000 m³ of high-strength concrete to the Impluvium consortium to build the diaphragm walls, two collector wells, and 60-metre-high barrettes, which are essential for supporting the basin’s structure.

Cemex also transported 128 000 t of excavated construction and demolition materials (CDM) by river to its quarries in Normandy and the upstream Seine sectors, as well as to a facility 40 km north of Paris, where the materials were treated and sorted.

Through this infrastructure project, the Paris municipality is improving the Seine water's hygienic quality by preventing wastewater discharge into the river.

Read the article online at: https://www.worldcement.com/europe-cis/04072025/cemex-participates-in-project-to-cleanse-the-seine-river-in-paris/