Metro Tunnel Project has taken the opportunity to reduce its carbon footprint in the construction of State Library and Town Hall stations.

This includes:

• the use of cement replacement within shotcrete and permanent lining
• the use of steel fibre in sprayed concrete instead of traditional steel mesh
• the application of synthetic fibre to sprayed concrete linings, reducing the overall amount of materials and excavation required.

These innovative approaches have reduced the carbon footprint of our concrete use, resulting in an overall reduction of 49.2% in the Portland cement content of concrete for the State Library and Town Hall stations.