Sustainability is at the forefront of the new Metro Tunnel Project in Melbourne, Victoria, which is set to be completed by 2025.

The 5 new stations have been accredited ‘6-star Green Star design’ from the Green Building Council of Australia, making them some of the most sustainable railway stations in the world.

The project has seen researchers at the University of Melbourne use crushed glass in structural concrete. Using up to 25% of recycled crushed glass, this diverts waste glass from landfill.

This is the first time a recycled glass concrete mix has been used in a structural application on a major infrastructure project anywhere in the world, having previously been limited to footpaths and local roads.

The project also leaned on Boral, to provide fly ash concrete mixes along with other eco-friendly products to meet the demands of this remarkable development.

Boral used their purpose-built mobile batch plant located in Western Melbourne to deliver these environmentally necessary products.

By introducing these innovations to reduce concrete’s carbon footprint, it is projected to reduce total carbon emissions by 165,000 tonnes from the project alone!

The new underground rail system will expand the city's network capacity and benefit thousands of commuters daily.