Fiberarmert betong i vegg- og bjelkeelementer: Prøving og sammenligning av fullskala vegg og praktiske laboratorieresultater
Master thesis
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https://hdl.handle.net/11250/3021426Utgivelsesdato
2022Metadata
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Sammendrag
This report is written as a final thesis for a master's degree in civil engineering at the University ofAgder. The scope of this report is fiber-reinforced concrete in walls and especially fiber-reinforcedconcrete in a cast-on-site wall versus beam forms cast in a laboratory.There are currently no clear regulations for the constructive use of fiber-reinforced concrete.Number of guidelines have been published for the design, control and execution of fiber-reinforcedconcrete, and this report can be seen as part of further research in the area. The report looks at thedifference in the strength of a fiber-reinforced wall with and without bar reinforcement compared tothe strength of a fiber-reinforced beam cast in beam form. It was also looked at how the fiberdistributes and orients itself in the different castings.Throughout this thesis it has been performed a literature study and a large part of practicallaboratory investigations. This involves casting two pieces of full-scale walls from which beams arecut, and casts of beams in forms. These beams have then been compared.The findings in this report are that the residual flexural tensile strength of a fiber-reinforced concretewall with bar reinforcement compared to practical laboratory results shows a clearly lower residualflexural tensile strength in the strength of the wall compared to results measured in the fiberreinforced concrete cast in beam forms. It has also been found that large parts of the fibersaccumulate almost like a ball between or just below the reinforcing bars. This leads to very little fiberreinforcement just above the reinforcing bars, which in turn leads to these areas becoming weaker.And that in some parts of the castings the fibers are placed irregularly, which means that certainparts of the fiber-reinforced concrete become significantly weaker than other parts.