CarbonBuilt’s Reversa™ process includes CO₂ emission-reducing innovations to both the concrete mix design and its curing process. On the formulation side, we introduce portlandite (also known as calcium hydroxide, a commodity chemical), reduce the usage of traditional cement and increase the use of waste materials like fly ash. The concrete is then formed using the same processes and equipment that are used today.
After forming, we cure the concrete with waste CO₂ emissions using a process that does not require expensive capture, compression or purification of the CO₂.
The Reversa process reduces emissions through a combination of utilization (permanently embedding CO₂ into the concrete) and avoidance (reducing CO₂ emissions associated with the raw materials).
Development of the Reversa technology at UCLA began in 2014. In 2020, with support from the U.S. Department of Energy and the NRG COSIA Carbon XPRIZE, the technology was used to produce over 10,000 concrete blocks using the CO₂ in flue gas taken directly from a coal power plant at the Wyoming Integrated Test Center. In March of 2021, a second demonstration was successfully completed at the National Carbon Capture Center in Alabama in which CO₂ in flue gases from both coal and natural gas power plants was used to produce more than 5,000 blocks. Ongoing work at UCLA and CarbonBuilt is focused on expanding our product portfolio and improving process efficiency.
THE REVERSA™ PROCESS
CarbonBuilt’s Reversa process is the first solution that marries substantial improvements in concrete’s carbon footprint with increased profitability for producers and “no compromise” performance. All three are required in order to create the future we envision.
Rahul Shendure, CarbonBuilt CEO