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An essential tool for decarbonizing the built


CarbonStar  is a quantification method for calculating the embodied carbon of concrete. 


CarbonStar Mission Statement

Complementing EPDs and PCRs related to concrete, CarbonStar provides a simple and easy-to-compare quantification of GWP for concrete in commercial applications. As the success of EnergyStar demonstrates, a simple technically-based approach focused on a single important performance metric can enable and accelerate a broader, more rapid adoption of lower carbon products.

Concrete's Carbon Problem

Concrete is the most-used building material on the planet. It is also the most polluting, accounting for 8% of global emissions. 

That huge amount of embodied carbon is because cement, the key ingredient of concrete, is one of the most carbon-intensive materials on earth, as it requires heating limestone to 1450°C / 2600F.

Share of Global Emissions

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Components of Concrete

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Counting the Carbon

With the rapidly growing number of techniques and technologies being used to reduce the embodied carbon of concrete, a method for counting that carbon is required. The technical specification, CSA SPE-112:21 published by CSA Group, outlines the methodology for the carbon intensity quantification and verification of concrete.

To learn more about the CarbonStar Technical Specification CSA SPE-112:21, please click the button to the right to get to the official page. 

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