American Concrete Institute shows CO2-curing innovations

Solidia Technologies‘ use of carbon dioxide in concrete curing was featured as an emerging technology in civil infrastructure during the American Concrete Institute fall 2015 Convention taking place last week in Denver.

Solidia Cement, which is silicate-based and has a low-calcium content, gains strength through carbonation instead of hydration. Presenting findings of “CO2-Cured Concrete based on Calcium Silicate Cement,” Solidia Technologies principal scientist Sada Sahu, said that, when compared to ordinary portland cement, 30% less CO is emitted during the production of Solidia Cement. Additionally, Solidia cement-based concrete can consume up to 300kg of CO per ton of cement during the curing process.

“When the reduced CO2 emissions associated with Solidia Cement production are considered along with the ability of that cement to consume CO2 during concrete curing, the CO2 footprint associated with the manufacturing and use of cement can be reduced by up to 70 percent compared to OPC. As water is not consumed during the curing process, the mix water can be recovered and recycled.”

Currently in commercialization for large- and small-scale applications, Solidia’s additional R&D collaborators include LafargeHolcim, CDS Group, DOE’s National Energy Technology Laboratory, the EPA, Rutgers University, Purdue University, Ohio University, and the University of South Florida.

Focused on the theme, “Constructability,” ACI’s Fall Concrete Convention and Exposition drew leaders in the field from across the globe, including chemists, scientists and frontrunners in concrete innovation.

Presentations were also made by Solidia investors and R&D partners, LafargeHolcim and BASF.

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