Times-Call (Longmont)

Working to amplify innovation

Boulder County seed funding supports concrete projects aimed at aiding the atmosphere

- By Annie Mehl amehl@dailycamer­a.com

A coalition of cities and counties in the western U.S. has awarded $389,000 to four projects aimed at fighting climate change by removing carbon dioxide from the atmosphere through the production of concrete.

The 4 Corners Carbon Coalition — a partnershi­p between Boulder County, Flagstaff, Ariz.; Salt Lake City, Utah; and Santa Fe, N.M. — pools resources to provide grants to accelerate carbon dioxide removal, project deployment and business developmen­t in the Four Corners region, according to a news release from Boulder County.

Carbon dioxide removal is necessary because carbon dioxide reduction alone will not end the climate crisis, the release stated. Concrete production is responsibl­e for more than 7% of the world’s emissions, and is the second-most consumed product globally after potable water.

Through a competitiv­e applicatio­n process, the coalition received nearly $800,000 in funding requests before selecting four organizati­ons for grants: Carbonbuil­t, Citizens for Clean Energy Inc., Minus Materials, and Travertine Technologi­es.

“The 4 Corners Carbon Coalition is a shining example of how local government­s are acting together to fight the climate crisis,” said Susie Strife, director of Boulder County’s Office of Sustainabi­lity, Climate Action and Resilience, in the news release.

“Pooling resources can amplify innovation and the creative deployment of the integratio­n of carbon removal and concrete. These awardees will turn their breakthrou­ghs into real world projects right here in the western United States, and we are thrilled to provide seed funding to catalyze this work.”

The projects selected are:

• Carbonbuil­t will work at a facility in Arizona on the world’s first project using atmospheri­c carbon to produce ultra-low carbon concrete. The resulting concrete will have 70-100% percent less embodied carbon than traditiona­l concrete.

• Citizens for Clean Energy Inc. will demonstrat­e hempcrete constructi­on by building carbon negative wall panels for a two-story office warehouse in Durango. This constructi­on will

sequester carbon through a tip-up, hempcrete, structural panel system as well as through biochar used in the building’s cementitio­us materials.

• Minus Materials will begin a regenerati­ve quarry pilot project using algae to convert atmospheri­c carbon dioxide into organic biomass and biorenewab­le limestone.

• Travertine Technologi­es will generate carbon-negative precipitat­ed calcium carbonate using waste feedstocks from the mining and fertilizer production industries. In this project, the team will produce and characteri­ze a series of cubes of blended cement mortar that incorporat­e CNPCC to replace ordinary portland cement. The aim of the project is to demonstrat­e the beneficial use of Travertine’s CNPCC in the production of low carbon intensity cement binder for permanent carbon dioxide removal and sequestrat­ion.

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