Said in Concrete

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.

Decarbonisation in Construction

Decarbonisation is no longer a future ambition—it’s a present-day responsibility for the construction industry. In this episode, Estelle sits down with Estela Garcez and David Law to explore how the sector is working to reduce its environmental footprint across the full lifecycle of materials, infrastructure and projects. From the progress already being made to the challenges still holding us back, this conversation looks at what meaningful change actually requires. Together, they unpack the role construction plays in the transition to lower-carbon infrastructure, the practical steps organisations are taking today, and where the biggest opportunities lie to accelerate decarbonisation across the industry.

Durability by Design

Durability is no longer just a technical detail, it’s central to how we build for the future. In this episode, Estelle sits down with Jonathan Dyson and Summer Wang to explore what durability by design really means in today’s construction landscape. As the industry shifts toward more sustainable and resilient infrastructure, the focus is moving beyond upfront cost to long-term performance and lifecycle value. From ultra high performance concrete to recycled materials and emerging technologies, this conversation unpacks how durability is evolving, and why it’s becoming critical to reducing maintenance, improving outcomes, and delivering infrastructure that lasts. Together, they share insights into where the industry is heading, the challenges in adopting new approaches, and what it will take to truly build for the long term.