Tunnel concrete 'made of debris'

Ifsttar is to develop new types of concrete for the two tunnels on the railway being built between Lyon, France, and Turin in Italy. Called the Lyon-Turin Ferroviaire, the Ambin Tunnel will be 57km and the Orsiera Tunnel 19km. Ifsttar joined forces with Holcim, Vicat, the materials research lab LERM, and the railway designer to find ways of using a third of the estimated 19million m³ of debris removed while digging the tunnels.
March 28, 2012 Read time: 1 min

4488 IFSTTAR is to develop new types of concrete for the two tunnels on the railway being built between Lyon, France, and Turin in Italy.

Called the Lyon-Turin Ferroviaire, the Ambin Tunnel will be 57km and the Orsiera Tunnel 19km.

Ifsttar joined forces with 680 Holcim, 684 Vicat, the materials research lab LERM, and the railway designer to find ways of using a third of the estimated 19million m³ of debris removed while digging the tunnels.

It will be turned into aggregates to make concrete for the tunnels.

Studies will be done on the nature of sulphates to avoid deterioration.

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Rock blasted from a new cross border tunnel on the new Turin to Lyon rail link is to be crushed and screened as aggregates by Holcim and Vicat. Project developer LTF has estimated that the 57km tunnel will generate 14million m3 of material and it is likely that most of the aggregates produced will be reused in the scheme.

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