Reducing CO2 in cement and buildings
Susteno reduces the clinker content of the cement and therefore its CO2 by 10% compared to an already CO2-optimized Swiss mass cement. Clinker is the most CO2 intensive component of cement with roughly two-thirds of CO2 emitted as a result of the chemical reaction in the manufacturing process. This means that the most meaningful way to reduce CO2 emissions of cement is by replacing clinker with mineral components. Since common substitute materials like fly ash and slag are not available in Switzerland, Holcim invented alternative local solutions, which also shortens logistics distances. In 2019, Susteno saved over 7,000 tons of CO2, the equivalent of 1,900 trips around the world by car.
Susteno is available in Switzerland.