FY18 Sustainability Report Transurban 38
Innovation
Innovative pavement use Continuing with our commitment to innovative materials in Queensland, this year we have significantly expanded our use of EME2. The Logan Enhancement Project will be among the first projects in Australia to use this product and is planning to roll out the material over approximately 8–10kms of heavily trafficked road. Current estimates suggest the overall thickness of asphalt will be reduced by 17.5 per cent, saving approximately 62,000 tonnes of asphalt. Cement substitution on NorthConnex Through the use of a bespoke batch plant at Mount Ku- ring-gai, the NorthConnex project will substitute up to 60 per cent of the total cement required for the project with recycled by-products such as fly ash. Sixty per cent cement substitution will be achieved across a variety of different concrete designs and is expected to reduce carbon emissions by up to 64,000 tonnes. Using recycling materials The team on the Monash Freeway Upgrade implemented a range of sustainability initiatives. The project used 70,000 tonnes of crushed recycled concrete and brick products in place of crushed rock in pavement layers. Approximately 600m of recycled HDPE stormwater pipes was also used in place of reinforced concrete pipes. This is equivalent to reusing the material from 200,000 two-litre- milk bottles.
High Modulus Asphalt (EME2) was developed in the 1980s and is an alternative asphalt mix which can be constructed using thinner layers and has the potential to improve efficiency, reduce environmental impacts and maintenance costs, and improve long- term durability.
Image (top): EME2 being used on the Logan Enhancement Project Image (bottom): Inside NorthConnex
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