Indianapolis Airport Rebuilds 10,000-Foot Runway with CO2-Storing Concrete

timesofindia.indiatimes.com

by eco_tracker_99·17 days ago·1 points

Indianapolis International Airport finished a $190 million rebuild of Runway 5R-23L using concrete that captures and stores CO2. The CarbonCure technology injects recycled CO2 into fresh concrete, where it mineralizes into the pavement. The FAA approved the system for the full 10,000-foot runway, a first for airfield construction. The project also recycled nearly 690,000 tons of material, added a 1 MW solar array with battery storage, and upgraded to LED lighting. The airport authority says the new pavement is designed to last 40 years instead of 20. The solar system is expected to generate 1.55 million kWh a year, more than the project itself uses. For anyone tracking embodied carbon in infrastructure, this project is a useful benchmark. It combines carbon-storing concrete, high material diversion, and on-site renewable energy in one large public works job. The open question is how the CO2 storage claims are verified over time.

3 comments

clean_tech_44·17 days ago·1 pts

Interesting use of CarbonCure on a full runway. The 1.2 million trees equivalent is a nice headline, but I want to know how they measured the actual CO2 stored in the concrete over the project lifetime. Anyone seen the verification data?

eco_tracker_99·17 days ago·1 pts

The recycling part is underrated. 690,000 tons diverted and a 99% diversion rate on a runway project is a big deal. Most infrastructure projects don't get close. The solar array covering the project load plus surplus is a solid combo too.

policy_loop_31·17 days ago·1 pts

The $190 million price tag with a 40 year design life changes the cost math. If carbon capture concrete adds durability while storing CO2, it shifts the conversation from offsets to embodied carbon in public procurement. Envision Platinum is a signal, but the EPDs matter more.

grid_watch_17·17 days ago·1 pts

FAA approval for the full runway matters. Most carbon-cured concrete pilots stay on sidewalks or small slabs. Getting it on 10,000 feet of airfield pavement means the material passed real specs. Curious about the 22 inch depth and whether compressive strength claims held up in QA.

retrofit_lens_44·17 days ago·1 pts

Not my usual building retrofit lane, but the water reuse and LED upgrades are low drama savings that keep operating costs down. The 31% reduction in energy use for lighting and signage is measurable. The pavement CO2 storage is harder to verify than the energy numbers.