CarbonCure Technologies Celebrates AASHTO Compliance

Robust evaluation determines that CarbonCure meets the stringent requirements of the American Association of State Highway and Transportation Officials as a concrete admixture.

Halifax, Nova Scotia, October 2, 2023 — CarbonCure Technologies, the global leader in carbon dioxide removal technologies for the concrete industry, announced today that ready mix concrete made with CarbonCure is compliant with the standards of the American Association of State Highway and Transportation Officials (AASHTO) as an admixture for concrete.

The verification of CarbonCure’s AASHTO’s compliance provides state transportation agencies, contractors and engineers with the confidence to integrate CarbonCure's technologies into their projects, advancing infrastructure construction with reduced CO₂ emissions and a more sustainable future for the transportation industry.

This evaluation of CarbonCure concrete was performed by SGS TEC Services  — an independent, accredited laboratory in Lawrenceville, Georgia — following the Unique, Patented, Proprietary Products (UP3) testing protocol managed under the auspices of AASHTO’s Product Evaluation & Audit Solutions. The concrete batching took place at Thomas Concrete’s facility in Doraville, Georgia and the AASHTO testing program focused on the effect of injecting CO₂ into concrete. 

Concrete properties of three control mixtures and three CarbonCure mixtures were tested in accordance with AASHTO M194 (ASTM C494) by the independent laboratory, evaluating slump, temperature, density, yield, air content, compressive strength, flexural strength and resistance to rapid freezing and thawing. In short, the CarbonCure mixes performed similarly to the control mixes and met or exceeded the job requirements specified by AASHTO. Additional durability testing also resulted in no negative impact on hardened concrete properties and confirmed the efficacy of CarbonCure in meeting and, in some instances, exceeding industry standards.

“This prestigious AASHTO validation underscores CarbonCure’s effectiveness and reliability, opening doors for its widespread adoption in highway and transportation projects across the United States,” said CarbonCure CEO Robert Niven. 

Five state departments of transportation have already added CarbonCure to their approved product lists. These include Colorado, Hawaii, Iowa, North Carolina and South Carolina. Hawaii’s HDOT was the first to approve CarbonCure in 2019. 

"This validation not only highlights the quality and safety of CarbonCure but also affirms our commitment to sustainable infrastructure development,” Niven added. “We are excited about the huge volume of DOT projects and new business opportunities for our concrete producer partners. We look forward to many more state DOTs adding CarbonCure to their own approved product lists and the positive impact our technologies will have on transportation projects nationwide.”

The compressive strength gain resulting from CarbonCure’s carbon mineralization solution has enabled a more efficient use of cement by CarbonCure’s growing global network of industry partners. This results in a more sustainable concrete product that meets the surging demand for greener building materials from both government and the private sector. 

In all, CarbonCure’s technologies have already been used to produce more than five million truckloads carrying more than 44 million cubic yards (33 million cubic meters) of lower carbon concrete, saving more than 348,000 metric tons of carbon dioxide, the equivalent to taking more than 77,000 gas-powered cars off the road for a year.

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About CarbonCure
CarbonCure Technologies is a fast-growing carbon dioxide removal tech company deploying easy-to-adopt solutions that enable concrete producers to use captured CO₂ to produce reliable, lower carbon concrete mixes. With hundreds of systems operating across dozens of countries, more than five million truckloads of CarbonCure mixes have supplied thousands of sustainable construction projects worldwide amid surging demand for greener building materials. CarbonCure’s cutting-edge research and innovation have garnered global recognition and prestigious awards, most notably the Carbon XPRIZE Grand Prize and induction into the Cleantech 100 Hall of Fame. CarbonCure’s investors include Breakthrough Energy Ventures, Blue Earth Capital, BDC, Amazon, Taronga Ventures, 2150, Microsoft, Samsung Ventures, BH3 Growth Equity, Carbon Direct, GreenSoil Investments and Mitsubishi Corporation. Follow CarbonCure on LinkedIn.

Media Contact:
Mike Carter-Conneen
CarbonCure Technologies
Sr. Director of Corporate Communications
media@carboncure.com