The Blue Planet company is coming up with a sustainable way to produce the world’s most popular building material concrete. It imitates nature as it makes concrete with biomimetic carbon capture. The company uses CO2 as a raw material to create a limestone rock substitute that replaces aggregate for concrete.
What sets apart the company from other competitors is that the captured CO2 does not require a purification step which saves both energy and capital. The Blue Planet’s concrete production process is highly efficient as it eliminates the need for the rock material for aggregate – costly to mine and transport, and waste CO2 is sequestered from the atmosphere.
The carbonate mineral coating – part of the production process – consists of 44% captured CO2. It is estimated that each ton of the final Blue Planet concrete contains 440 kilograms of carbon dioxide sequestered permanently. This carbon capture storage and utilization process is one of the most environmental ways of CO2 storage, significantly reducing concrete’s high carbon footprint.
Blue Planet Company Biomimetic Carbon Capture Process
Blue Planet’s biomimetic carbon capture process mimics natural ooid rock formation. For the ooids to be formed, layers are gathering around a nucleus that is typically a shell fragment or quartz grain. Blue Planet introduces CO2 into a water-based capture solution in a similar way.
A carbonate solution is coated over a nucleus or substrate and the result is a synthetic limestone. The synthetic limestone is then exposed to recycled alkaline aggregate material. The material is usually an industrial waste or common rock to increase the environmental benefits of the product.
When the synthetic limestone is exposed to the alkaline aggregate substrate a reaction causes the formation of a mineral coating – similarly to the formation process of ooid rocks. As the CO2 purification process is not needed here, Blue Planet is able to perform the carbon sequestration more efficiently.
The limestone rock substitute that is produced in the process replaced the natural limestone rock that must be mined from quarries. As the world’s constructions are growing, this sustainable concrete production process is trapping CO2 emissions into a widespread material.
A project that the company has undertaken is the San Francisco International Airport in California. It required Blue Planet’s limestone rock substitute for a major development project in 2016 that significantly reduced its overall carbon footprint.
Blue Planet is an example of a sustainable company innovating in space in an urgent need of decarbonization. The carbon capture concrete is produced without compromising on quality which additionally increases its economic benefits.