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Utilization of fly ash from co-combustion in self compacting concrete
2004 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This Study is a diploma work conducted in collaboration between Vattenfall Utveckling AB and the Division of Structural Engineering in the Department of Civil Engineering at Luleå University of Technology in Sweden. The object is to find out if fly ash can be a competitive filler material in self- compacting concrete, if so, how the variation in fly ash properties affects the self-compacting concrete’s fresh state features. The conclusions are that fly ash might have sufficient qualities as an inert filler material in self-compacting concrete, depending on the specific fly ash mineralogical composition. Adverse substances with respect to the self- compacting concrete’s fresh state are the presence of alkali, free lime and loss on ignition (unburned coal) in the fly ash. The study does not include to what extent the specific substances effect the concrete or what can be considered as critical amounts of each substance. The study regarding the hardened state concludes that most of the mixtures containing fly ash govern a higher or equal ultimate compressive strength than the reference mixture consisting of ordinary Lime stone filler. The future research steps that are proposed are to investigate and determinate threshold values for the controlling substances mentioned above. Other suggested research areas within the civil engineering field are in the geotechnical area.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Self-compacting concrete, Rheology, Fly ash
Keyword [sv]
URN: urn:nbn:se:ltu:diva-45737ISRN: LTU-EX--04/016--SELocal ID: 368d23b8-f7a0-4322-89e3-6f62b131841aOAI: diva2:1019034
Subject / course
Student thesis, at least 30 credits
Educational program
Civil Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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