Switzerland: Sika has developed ReCO2ver, a process which produces limestone, sand and gravel from the combination of concrete and CO2 with an additive developed by the supplier. The process enables demolition companies to completely recycle used concrete, while storing captured CO2 at a rate of 60kg/t of crushed concrete. The materials produced can be used as aggregates to make concrete of comparable strength to an all-new product.
Chief executive officer Paul Schuler said, "The five largest European Union countries alone generate roughly 300Mt/yr of old concrete. With complete recycling of these materials, up to 15Mt/yr of CO2 emissions can be stored. We are convinced that our new process has the potential to benefit both our customers and the environment."