{"id":26702,"date":"2024-02-09T12:19:52","date_gmt":"2024-02-09T11:19:52","guid":{"rendered":"https:\/\/www.soletanche-bachy.com\/a-toulouse-bessac-realise-2-tunnels-de-la-ligne-b-du-metro-entierement-en-beton-tres-bas-carbone-exegy\/"},"modified":"2024-04-18T17:27:40","modified_gmt":"2024-04-18T15:27:40","slug":"in-toulouse-bessac-is-building-2-tunnels-on-metro-line-b-using-exegy-ultra-low-carbon-concrete","status":"publish","type":"post","link":"https:\/\/www.soletanche-bachy.com\/en\/in-toulouse-bessac-is-building-2-tunnels-on-metro-line-b-using-exegy-ultra-low-carbon-concrete\/","title":{"rendered":"In Toulouse, Bessac is building 2 tunnels on metro line B using EXEGY\u00ae ultra-low-carbon concrete!"},"content":{"rendered":"

09\/02\/2024<\/p>\n<\/div>

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In Toulouse, Bessac is building 2 tunnels on metro line B using EXEGY\u00ae ultra-low-carbon concrete!<\/h1><\/div>
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On February 2, the Cl\u00e9mence Isaure TBM, manufactured by Bessac, was christened and set off on the extension of line B of the Toulouse metro. To mark this key moment in the project, let’s focus on a major first: Bessac’s teams are producing the tunnel’s 2,850 segments in EXEGY\u00ae by Bessac ultra-low-carbon concrete made from locally sourced metakaolin! <\/strong><\/p>\n<\/div>

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Bessac<\/a> is leader of the consortium formed with GTM Sud-Ouest TP GC and Soletanche Bachy France<\/a> for the construction of the underground structures of Connexion Ligne B (CLB). These include two single-tube tunnels, each 250 m long and with an internal diameter of 4.66 m, which form a double metro track with a reduced right-of-way under the Canal du Midi.<\/p>\n

Bessac’s teams will produce all 2,850 tunnel segments in EXEGY\u00ae by Bessac ultra-low-carbon concrete. And for the first time on the segments, thanks to the support of VINCI Construction and Soletanche Bachy’s Materials Departments, 55% of the cement clinker used in the concrete has been replaced by a mixture of limestone filler and metakaolin.<\/p>\n

This innovation makes it possible to reduce the CO2 emissions linked to the concrete used for the segments by around 40% compared with traditional concrete. All this at equivalent prices and with performance in line with Tiss\u00e9o’s customer requirements in terms of strength class (C40\/50) and exposure class ensuring durability of reinforcement (carbon dioxide attack) XC2 and chemical attack XA1.<\/p>\n<\/div>

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Where does Concrete’s carbon footprint come from? <\/strong><\/h3><\/div>
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