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How Delta Group are shaping tomorrow, today

Delta Group is committed to diverting construction and demolition waste from landfills to help build a better tomorrow for everyone. 

More than two decades ago, Delta Group’s founder and managing director – Con Petropoulos – knew it was essential to contribute to the recycled materials space, to ensure preservation, protection and sustainability for future generations.

Delta Group has been a central part in delivering many of Melbourne’s iconic landmarks – including the demolition of the Gas and Fuel Towers in Flinders Street, the Melbourne Cricket Ground (MCG) expansion, and more recently the Hazelwood Mine and Power Station demolition.

Delta’s recycling and logistics general manager Dominic Santullo said the company continues to evolve, embracing new technology, equipment and expertise to ensure optimal outcomes.

“With the Hazelwood project, we probably would have been able to deliver the project 20 years ago, but not as quickly or efficiently as we have”, Santullo said.

“Thanks to advances in all areas of demolition, and Delta Group’s ability to pool resources, machines and equipment from all over the country, we were able to deliver the entire project with zero lost time injuries.

“An incredible achievement for a project with over 1.1 million work hours.”

Delta is one of Australia’s largest processors of commercial and demolition waste streams, recycling close to 90 per cent of construction and demolition waste from their projects, including ferrous and non-ferrous metals, timber, concrete and other construction materials.

Delta’s recycling and logistics general manager Dominic Santullo has been with the company for more than 25 years.

Annually, Delta diverts over 2 million tonnes of landfill into the roads and building materials of the future.

Whelan the Warehouse is the timber recycling division of Delta Group. As the demand for timber products with unique provenance and sustainability principles soars, Whelan the Warehouse has established a strong reputation among Australia’s leading builders, architects and interior designers for high-quality salvaged and sustainably sourced new timber.

“With the MCG project, the timber from this historic site was all salvaged and recycled – furniture was made out of it – it ended up in people’s homes, people’s offices, shopping centres,” Santullo said.

“Demolition is often seen as a dirty industry – we’re making it clean because of what we do with the materials, we don’t just send it to landfill and bury it, we try to give it a second life.”

Delta displayed its ability to move recycled materials at scale during the successful completion of the Hazelwood project, which was shortlisted at the 2022 World Demolition Awards in the Industrial Demolition category.

“We were demolishing one of the biggest power stations in the Southern Hemisphere – it was massive,” Santullo said.

“Over 100,000 tonnes of steel was recycled, and over 100,000 tonnes of concrete waste was crushed and recycled on site.”

“It was re-used back on-site; it could have been sent away, but it was used to remediate the site, and utilised to help the new construction currently taking place out there.”

Delta’s ability to handle the logistics was another key aspect showcasing its expertise when it came to the state’s biggest demolition and recycling project.

“Everything that you move off-site needs to be moved in trucks. Not only was the demolition a massive part, but also the logistics behind it to cart every tonne of scrap so it can be recycled,” Santullo said.

“That was the quiet achiever – the transport every day running in the background from the country to the city.”

A key component in the transport process was optimising efficiency and minimising environmental impact.  Utilising a specialised fleet of road transport ensured reduced emissions targets were met.

Recycled concrete is one of Delta’s main strengths, sharing a partnership with Boral in Victoria.  Delta moves in excess of 1.5 million tonnes annually of recycled concrete through this partnership in metro Melbourne alone.

Together, Delta and Boral crush, process and treat waste concrete, brick and excavation rock into a product called Envirocrete, which meets all Vic Roads and local council specifications as an approved substitute for crushed virgin quarry rock.

Envirocrete has been used in major infrastructure works like roadworks, as well as level crossing removals, freeway and highway upgrades and subdivision work.

The West Gate Tunnel project in Melbourne has utilised Delta’s recycled materials.

“With West Gate, Delta supplied the recycled material, so it’s a good feeling driving over that road knowing you’ve made a positive contribution to a sustainable future,” Delta’s concrete recycling and contract crushing project manager James Georgiou said.

Delta Group has come a long way since it was established over 50 years ago by Petropoulos, with one of his first projects in the Latrobe Valley in Victoria. Now with offices in every Australian state, the company prides itself on being able to handle any project, in any location from the metro, regional, remote or marine areas.

Georgiou said the company’s expertise in the recycled materials space had set it up to be able to tackle any job, big or small.

“A lot of government projects are required to use recycled materials first… we’re able to meet the demand and supply to many government infrastructure projects,” Georgiou said.

“Big highway upgrades, level crossing removals, freeway widenings and upgrades, a lot of those projects that have taken place over the last five years, the initiative and drive is for those projects to use recycled materials first.

“That’s where Delta Group can deliver, and demonstrates how we’re helping to shape tomorrow”.


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