In an attempt to combat the effects of climate change, the Hawaii Department of Transportation is making some changes to its concrete. Carbon-injected concrete is a green solution that greatly reduces embodied concrete. The material is no more expensive than traditional concrete and it has shown to be stronger as well. This type of concrete has already been approved for horizontal uses (such as roads) and is being tested on vertical projects now. Since transportation is the leading source of greenhouse gas emissions, this is a positive step toward reducing the transportation industry’s carbon footprint.

Dive Brief: The Hawaii Department of Transportation plans to use carbon-injected concrete in all construction as part of its climate change solution. In an interview with Smart Cities Dive, Edwin Sniffen, deputy director of highways for the Hawaii DOT, said the carbon-injected material has turned out to be stronger and more workable, with no increase in cost over traditional concrete. Green concrete can reduce embodied carbon by 25 pounds per cubic yard, according to the state. The state is using technology from Canadian startup Carbon Cure., which sources CO2 from industrial facilities and converts it into a mineral that is injected into concrete, replacing some of the cement mix. A field test in May showed that the technology was workable for flat surfaces - in fact, Sniffen said contractors found it easier to work with than traditional concrete. Calling on the city to consider CO2-injected concrete wherever applicable.
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