Blair Block moves first to commercialize CarbonBuilt technology

Sources: CarbonBuilt, Los Angeles; CP staff

Alabama’s Blair Block projects an early-2023 debut for low-carbon concrete masonry units produced with the CarbonBuilt Reversa carbon dioxide capture and mineralization process. Reversa deployment stands to reduce Blair Block products’ carbon footprint upward of 80 percent with no compromise on price, performance or plant operations.

Blair Block will capture and mineralize carbon dioxide in concrete masonry units at rates exceeding 0.5-lb./unit.

A production line retrofit at the producer’s Childersburg plant outside Birmingham will enable annual output of 2.3 million 8-inch block equivalents bearing the CarbonBuilt process. Each block will permanently sequester around 0.55 lb (0.25 kg) of carbon dioxide, resulting in annual removal of about 600 metric tonnes of the greenhouse gas. In addition, approximately 2,500 metric tonnes of CO2 emissions will be avoided through changes in the masonry units’ mix formulations. 

“This partnership is a critical step in our journey to reduce the carbon footprint of the concrete industry,” says CarbonBuilt CEO Rahul Shendure. “Our approach, which reduces the cost of concrete production while simultaneously reducing carbon dioxide emissions, unlocks the potential of the concrete industry to drive gigatonne-scale carbon removal in the coming years.”

CarbonBuilt’s masonry formulations replace most, or all, of the carbon-intensive portland cement with widely-available, lower-carbon, and low-cost materials, he adds. At Blair Block, CO2 emissions derived from locally sourced forestry waste will be mineralized into concrete masonry during the curing process. Stripe Climate, the first buyer of carbon removal credits accrued to CarbonBuilt technology, has purchased 2,000 metric tonnes attending Blair Block’s Reversa rollout.

“We first saw the environmental potential of CarbonBuilt’s technology when we participated in their pilot demonstration project at the National Carbon Capture Center,” explains Vice President Matt Blair, referencing green block shipped to the U.S. Department of Energy facility in Wilsonville, Ala. for a Reversa curing cycle. “But it was the strong economic value proposition that solidified our decision to become the first commercial-scale producer to implement CarbonBuilt’s technology.”

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