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Återanvändning av betongslam som ersättning för ballast och cement
University of Borås, Faculty of Textiles, Engineering and Business.
2023 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Reuse of concrete sludge as a substitute for aggregate and cement (English)
Abstract [sv]

Examensarbetet har genomförts i samarbetet med Swerock och Temakon. Målet är att återvinna slammet som uppkommer vid produktion av fabriksbetong. Elva gjutförsök har genomförts i högskolans laboratorium för att utvärdera vilket är det bästa sättet att återvinna slammet, som ersättning av ballast i en nytillverkad betong eller som ersättning av cement i betongen. Tryckhållfastheten för gjutförsöken undersöktes vid 7 och 28 dagar samt arbetbarheten testades genom sättmått och flyttsättmått. De två egenskaperna kommer att jämföras med referensbetongens egenskaper. Malningstester har genomförts delvis på Temakons laboratorium under handledning av Thomas Magnusson och på högskolans eget laboratorium. Resultatet visade att för slammet som cementersättning har vi fått likvärdig och till och med bättre tryckhållfasthet och arbetsbarhet i jämförelse med. Gjutningar där slammet användes som vått slam var tryckhållfastheten betydligt bättre än referensbetong, dock var arbetbarheten mer trögflytande.

Abstract [en]

The thesis has been carried out in collaboration with Swerock and Temakon. The goal is to recycle the sludge that arises during concrete production in factories. Eleven casting tests have been carried out in the university's laboratory to evaluate which is the best way to recycle the sludge, as a replacement for aggregate in a newly manufactured concrete or as a replacement for cementin the concrete. The compressive strength for the casting tests was examined at 7 and 28 days, and the workability was tested by slump and slump flow measurements. The two properties will be compared with the properties of the reference concrete. Grinding tests have been partially carried out at Temakon's laboratory under the supervision of Thomas Magnusson and at the university's own laboratory. The result showed that for the sludge as a cement substitute, we have obtained equivalent and even better compressive strength and workability in comparison with the reference concrete that has been obtained by Ulf Knutsson at Swerock. Castings where the slurry used was wet slurry, the compressive strength was significantly better than reference concrete, however, the workability was a little tough when worked.

Place, publisher, year, edition, pages
2023.
Keywords [sv]
VCT, Tryckhållfasthet, Sättmått, Referensbetong
National Category
Construction Management
Identifiers
URN: urn:nbn:se:hb:diva-29869OAI: oai:DiVA.org:hb-29869DiVA, id: diva2:1763346
Supervisors
Examiners
Available from: 2023-06-08 Created: 2023-06-07 Last updated: 2023-06-08Bibliographically approved

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CiteExportLink to record
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