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Betongens hållfasthetsutveckling vid användning av olika ersättare för portlandklinker: En laborativ studie
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
2012 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Concrete strength development in the use of different replacement for clinker : An experimental study (English)
Abstract [sv]

Tillverkning av portlandklinker står för ungefär fem procent av världens totala koldioxidutsläpp. Det finns därför ett allmänt intresse att minska användandet av portlandklinker. Klinkern kan antingen ersättas av andra cementerande material, eller så kan nya cementsnåla recept utformas. I den här rapporten har två cement med inmald flygaska respektive slagg från Cementa AB undersökts. För att undersöka klinkerersättnings-materialens potential har tester för tryckhållfasthet, uttorkningskrympning, bindetid, värmeutveckling och arbetbarhet utförts. Resultaten visar att skillnaderna mellan försökscementen och byggcementet är så pass små att båda bör kunna användas som byggcement.

Ytterligare har ultrafiller av kalksten använts som ersättare för att minska cementhalten i betongen. Det går lika bra att delvis ersätta försökscementen med ultrafiller som det gör för byggcementet. Med cementsnåla recept och större del ersättningsmaterial finns det stora möjligheter att spara på energi och miljö. Detta borde i framtiden kunna leda till ett bättre och mer miljövänligt byggmaterial.

 

 

 

Abstract [en]

Manufacture of clinker is responsible for about five percent of the total global carbon dioxide emissions. Therefore, there is a general interest in reducing the use of clinker. Clinker can either be replaced by other cementitious materials, or reduced by using lean-cement recipes. This report examines two experimental cements, one with fly ash and one with slag, developed by Cementa AB. To examine the potential of clinker replacement materials, tests for compressive strength, drying shrinkage, initial setting, heat generation and workability, were performed. The results show that the differences between the experimental cements and the reference are so small that both are useable as building cements.

In addition, an ultrafine filler of limestone is used as a replacement material for further reduction of the clinker content in concrete. It was also found, that it is just as efficient to partly replace the experimental cements with ultrafine filler as in the reference cement. There are great opportunities to save energy and the environment impact with both clinker-saving cement recipes and with cement replacement materials. This should lead to a better, more environmentally friendly, building material in the future.

 

 

Place, publisher, year, edition, pages
2012. , 53 p.
Keyword [en]
Compressive strength, Clinker-saving, Ultrafine limestone filler, Fly ash, Granulated blastfurnace slag
Keyword [sv]
Tryckhållfasthet, Cementsnål, Ultrafin kalkfiller, Flygaska, Granulerad masugnsslagg
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-101677OAI: oai:DiVA.org:kth-101677DiVA: diva2:548500
External cooperation
CBI Betonginstitutet AB
Subject / course
Constructional Engineering and Design
Educational program
Bachelor of Science in Engineering - Constructional Engineering and Design
Uppsok
Technology
Supervisors
Examiners
Available from: 2013-05-06 Created: 2012-08-30 Last updated: 2013-05-07Bibliographically approved

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