![]() The difference being that Blue Planet aggregate contains sequestered CO2, which when used in place of traditional aggregate, reduces the embodied carbon of concrete. ![]() One approach to lowering the CarbonStar rating for a cubic yard of concrete is to replace traditional aggregate with Blue Planet aggregate. The CarbonStar rating is a metric based on the embodied mass of CO2 in a unit of concrete. This approach is a truly global one in that all countries alike purchase rock by funding infrastructure projects every year.īlue Planet’s Government Affairs and Built Environment teams were part of a body of experts in concrete and green building that recently published CarbonStar. ![]() Governments have the procurement power to specify carbon-sequestered rock in construction projects, providing what may be the strongest lever we have world-wide to prevent CO2 from entering Earth’s atmosphere. Most aggregate on a worldwide basis is purchased by governments, or for government-funded projects. But because Blue Planet denudes it of its weakened crushed components, it is now upcycled to the equivalent regular aggregate. The by-product is the original sand and gravel used in the concrete, which would normally be limited to low value applications. Typically if it is not landfilled, it is broken up and recycled for a low value use – such as a road base.īlue Planet uses this waste concrete in its process as a source of calcium and alkalinity. The circular economy is integral to any path to net-zero and on a mass basis, concrete is the biggest component of the circle. The IPCC predicts CCUS capacity will need to reach 3.5Gt by 2050 in order to keep temperature rise below 1.5 degrees.īlue Planet offers a decarbonization pathway to "hard to abate" sectors such as steel and cement that are heavy emitters but produce materials essential to modern life.īy combining Blue Planet's technology with "Blue" hydrogen SMR can become a carbon neutral process unlocking a crucial bridge to the hydrogen economy.
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