Biochar trial paves the way for sustainable infrastructure
A residential street in St Marys has locked away 96 tonnes of carbon thanks to an innovative road pavement trial.
Following detailed technical investigations and testing, City of Mitcham partnered with Hiway to deliver South Australia’s first biochar road at St Marys Street.
Using MasterCarb A technology, the road has been strengthened using the existing materials enhanced with an emulsion binder and biochar, a carbon-rich product derived from agriculture and forestry industry waste.
Hiway’s Executive General Manager for Innovation and Client Solutions Neil McLoughlin said the road was effectively a ‘carbon sink’ that locked away carbon permanently.
The specially engineered blend was expected to be well suited to the reactive soils in St Marys, leading to improved road performance and longevity.
“Because of the engineered properties of the MasterCarb A, we don’t have to go full depth which means Council doesn’t have to lower services, which saves cost and time, allowing us to minimise disruption for local residents.”
City of Mitcham Mayor Dr Heather Holmes-Ross said the project showcased Council’s commitment to sustainable infrastructure.
“We’re excited to be exploring this innovative technology that has the potential to create efficiencies, reduce the impact on our communities and play a role in lowering our carbon footprint.”
City of Mitcham will monitor the performance of the street and will consider extending the trial in coming months.