The Hawaii Department of Transportation (HDoT) is testing a concrete mix injected with waste carbon dioxide (CO2) as part of a sustainable transportation project, says Big Island Now.
The report says the trial involves 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.
This test is expected to allow HDoT to compare both mixes to determine specifications for the use of carbon-injected concrete for road projects.
Governor of Hawaii David Ige, says: “As the daily baseline measurement for carbon dioxide in our atmosphere reaches the highest level in modern history, it is especially important for all of us to do all we can towards ensuring a sustainable Hawaii for future generations.”
Island Ready-Mix Concrete produced the carbon-injected concrete using waste CO2, provided by Hawaii Gas, which is then mixed into the concrete using CarbonCure Technology.
The finished product traps CO2 in mineral form within the concrete and helps improve the comprehensive strength of the material.
The trial was supported by Elemental Excelerator, a Hawaii-based start-up accelerator that offers support to start-ups, local businesses and government agencies.