Kapolei Interchange Phase II

Hawaii DOT Tests Sustainable Concrete Mix

On May 16, 2019, the Hawaii Department of Transportation (HDOT) announced in a press release that the department would be demonstrating the use of concrete made with the CarbonCure Technology as a sustainable transportation initiative. The initial test involved a pour of 150 cubic yards of carbon-injected concrete next to an equivalent pour of standard concrete mix on an access road for the Kapolei Interchange Phase 2 on Oahu Island. The carbon-injected concrete used in the testing was produced by Island Ready-Mix Concrete using waste carbon dioxide captured from Hawaii Gas, and distributed by Matheson Gas.

The demonstration project comes on the heels of an adopted resolution by Honolulu City Council that “requests the city administration to consider using carbon dioxide mineralization concrete for all future city infrastructure projects utilizing concrete.” The State of Hawaii also tabled legislation—currently pending—that “requires all state building construction that uses concrete to use post-industrial carbon dioxide mineralized concrete.”


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