Sustainability in Concrete

Special Edition Episode - Season Two Recap

After a season of conversations spanning numerous topics, this special edition episode takes a step back to reflect on the bigger themes shaping the future of construction. Joining Estelle for this recap discussion are David Millar, CEO of the Concrete Institute of Australia, and Clare Tubolets, CEO of SmartCrete CRC. They revisit some of the most important insights and recurring challenges raised throughout the podcast series — from bridging the gap between research and industry, to navigating sustainability, workforce capability and long-term infrastructure resilience. Rather than looking at these topics in isolation, this conversation explores how they connect, what the sector still needs to improve, and why collaboration across the entire ecosystem will be critical moving forward. This episode is both a reflection on how far the industry has come, and a conversation about where it needs to go next.

Engineering Sustainability

Sustainability in construction is no longer a side conversation. It’s reshaping the way projects are designed, specified and delivered across the industry. In this episode, Estelle sits down with Lauren Howe from Arup and Sam Chen from Mott MacDonald to explore how engineering and materials expertise are helping drive the transition toward lower embodied carbon infrastructure. Rather than focusing purely on future targets, this conversation looks at the practical realities of change — where the industry is already making progress, where barriers still exist, and how collaboration across design, materials and delivery will ultimately determine how quickly we move forward. From evolving expectations around carbon accountability to the importance of systems thinking and innovation, this episode unpacks what it really means to engineer sustainability into the built environment.

Sustainability in Concrete

In this episode, Estelle is joined by Ali Kashani from UNSW and Evan Smith, National Sustainability Manager at Holcim, to explore one of the construction industry’s biggest challenges—decarbonising the way we build. As the push toward net zero continues to accelerate, the conversation around concrete is evolving beyond strength and performance to focus on lifecycle impact, material innovation and smarter decision-making across the supply chain. From low-carbon concrete and Environmental Product Declarations (EPDs) to circular economy principles and emerging technologies like 3D concrete printing, this discussion unpacks what it really takes to make sustainable construction practical, scalable and commercially viable. Together, they explore the role industry, research and government all play in driving meaningful change, and why collaboration will be critical to building a lower-carbon future.

Research, Innovation & Industry

Innovation in construction is often talked about as the next big step — but the real question is how we actually get there. In this episode, the focus turns to what happens between a good idea and real-world impact. With so much promising research emerging across the sector, from low-carbon materials to technologies like 3D concrete printing, the challenge isn’t a lack of innovation, it’s translating it into something that can be adopted, scaled and trusted in practice. Joining the conversation are Jessey Lee, Structural Engineer, and Janitha Migunthanna, Education Specialist in Civil and Construction Engineering from Swinburne University. Together, they share their perspective on where the disconnect between academia and industry still exists, what stronger collaboration could look like, and why applicability needs to be front of mind from the very beginning. This episode looks beyond the ideas themselves and into the systems, relationships and mindset shifts needed to make innovation stick — not just in theory, but on the ground where it matters most.

Building for the Future

Durability, performance, and long-term value are becoming central to how we think about construction — but it all starts with the materials we choose. In this episode, Estelle sits down with Craig Mellick and Sean Windred from BG&E Materials to explore the role materials engineering plays in shaping the built environment. From design life and durability to testing, data, and real-world application, the conversation looks at how a deeper understanding of materials can lead to smarter, more resilient outcomes. Together, they explore how the industry is evolving, from traditional processes to more advanced technologies, including data monitoring, adaptive reuse, and innovative approaches to construction. They also discuss the balance between risk and innovation, and why better-informed decision making is critical to improving both performance and sustainability. This episode offers a practical perspective on what it really takes to build structures that last, and why the future of construction depends on getting the fundamentals right.