{"id":14641,"date":"2024-03-21T15:00:09","date_gmt":"2024-03-21T15:00:09","guid":{"rendered":"http:\/\/TheNextWeb=1404953"},"modified":"2024-03-21T15:00:09","modified_gmt":"2024-03-21T15:00:09","slug":"swedish-startup-secures-e10m-to-turn-industrial-waste-into-green-cement","status":"publish","type":"post","link":"https:\/\/www.londonchiropracter.com\/?p=14641","title":{"rendered":"Swedish startup secures \u20ac10M to turn industrial waste into green cement"},"content":{"rendered":"\n

Concrete \u2014 a mixture of cement, sand, and water \u2014 is the second most used material on Earth after water. Ton-for-ton, more of it is laid down every year than steel, wood, plastics, and aluminium combined. Problem is, cement production emits 8% of global CO2 \u2014 four times that of air travel.<\/span><\/p>\n

Swedish startup<\/a> Cemvision has devised a cement making process that utilises by-products from industries like steel and mining instead of fresh limestone, resulting in a circular, cleaner alternative. <\/span><\/p>\n

\u201cWe\u2019re on track to producing cement that emits 95% less carbon than traditional methods while remaining just as strong and potentially even faster-drying,\u201d Oscar H\u00e5ll\u00e9n, CEO of Cemvision, told TNW. <\/span><\/p>\n

When limestone is heated in a kiln, calcium carbonate breaks down into calcium oxide and carbon dioxide. Around 60% of the cement industry\u2019s total emissions are a result of this process. By using certain industrial by-products, like slag from steelmaking, <\/span>Cemvision sidesteps this chemical reaction entirely.<\/span><\/p>\n

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The other 40% of cement\u2019s emissions come from the energy needed to superheat limestone in a kiln. Today most kilns are powered by coal, oil, and natural gas. In the EU, some even <\/span>burn rubbish<\/span><\/a>. <\/span><\/p>\n

Cemvision\u2019s demo plant in Poland, which came online in mid-2023, produces 4,000 ton of cement a year and is powered by biofuel. The startup is currently developing a kiln that runs on (mostly renewable) electricity at its lab in Stockholm. <\/span>Because the industrial waste it uses can be processed at lower temperatures, Cemvision needs much less energy overall to produce its cement. <\/span><\/p>\n

\"Cemvision_kiln-poland-green-cement\"
<\/i><\/a>Last year, Cemvision retrofitted a pilot plant in Poland to produce 4,000 tons of its green cement per year. Credit: Cemvision<\/figcaption>