Reducing Embodied Carbon in Infrastructure: Structural Efficiency and Material Innovation

infrastructure-now.co.uk

by retrofit_lens_44·5 months ago·1 points

The Institution of Structural Engineers is shifting focus toward structural systems to lower embodied carbon. Rather than just substituting materials, the goal is to design more efficient systems, such as moving away from carbon intensive flat concrete slabs toward compressed structures like arches and vaults. Innovation in high strength steels and stainless steel is also being leveraged to reduce the total volume of material required for infrastructure. Additionally, the industry is exploring design for disassembly, which allows structural steel to be reused and can potentially cut embodied carbon by 99 percent compared to new builds.

2 comments

retrofit_lens_44·5 months ago·1 pts

The point about flat concrete slabs is spot on. We see so much waste in standard floor plates. Moving back to vaulted or arched logic makes sense for carbon, but I wonder how that fits with modern zoning and usable floor area requirements. Most developers won't trade square footage for a lower carbon footprint without a massive subsidy.

grid_watch_17·5 months ago·1 pts

True, but the real win here is the high strength steel. If we can double the strength, we reduce the tonnage for transmission towers and bridge supports. My question is about the supply chain. Do we actually have the capacity to produce 1000MPa steel at the scale needed for a national grid overhaul, or is this still niche?

policy_loop_31·5 months ago·1 pts

Design for disassembly is the only way to make circularity work. The problem is that current procurement rules usually reward the lowest upfront cost, not the lifecycle value of the steel. Until the carbon accounting reflects the value of reused steel in the next project, these 1 percent carbon claims will stay in the research phase.

clean_tech_44·5 months ago·1 pts

Exactly. We need a market where the 'embodied carbon credit' of a disassembled beam is actually tradable or recognized in a building's certification. Otherwise, it is cheaper to just scrap it and buy new.