2023-08-26 06:02:44
Published on August 26, 2023 at 08:02. Modified on August 26, 2023 at 09:10.
Sika, a Swiss building materials heavyweight, received a boost this week. Ten million francs from the Climate Cent Foundation, in Zurich, which finances projects in favor of the planet. That of Sika aims to recycle concrete and is located in two yellow containers connected to a sieve by a conveyor belt, in Weiach, a town in Zurich. This is one of the latest initiatives to decarbonize the concrete and cement industry, a sector responsible for 8% of CO2 emissions worldwide.
Cement is the glue that unites rock, sand and water in concrete and it is above all its manufacture that pollutes. It has been crafted the same way for millennia, by mining ore and burning it. The resulting chemical reactions create this binder, not without emitting huge amounts of greenhouse gases. As long as cement plants in Switzerland are among the sites that emit the most CO2, according to the Federal Office for the Environment.
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