Tidigare har det varit problematiskt att använda biokol i cement för att göra den miljövänligare och minska utsläpp, eftersom enbart 3 procent biokol-tillsats försämrade betongens styrka. Men nu har forskare vid Washington State University lyckats blanda in 30 procent biokol i cement och uppnå en tryckhållfasthet jämförbar med vanlig betong.
Forskning: Här är betongen som ger minusutsläpp
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Nu hävdar amerikanska forskare att de har utvecklat en betong som ger minusutsläpp, samtidigt som den är nästan lika stark som vanlig betong.

Zhipeng Li och Xianming Shi vid Washington State University.
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För att minska klimatpåverkan från betong ersätts ofta en del av cementen med biprodukter, som flygaska från kolkraftverk eller slagg från stålindustrin. I det här fallet har forskarna i stället använt biokol som en miljövänligare komponent i cementen. Genom att behandla biokol med betongspillvatten lyckades forskarna blanda in 30 procent biokol i cementen. Blandningen nådde en tryckhållfasthet på 27,6 MPa efter 28 dagar, likvärdig med konventionell betong.
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
