| dc.description.abstract | This report is written as a final thesis for a master's degree in civil engineering at the University of
Agder. The scope of this report is fiber-reinforced concrete in walls and especially fiber-reinforced
concrete 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-reinforced
concrete, and this report can be seen as part of further research in the area. The report looks at the
difference in the strength of a fiber-reinforced wall with and without bar reinforcement compared to
the strength of a fiber-reinforced beam cast in beam form. It was also looked at how the fiber
distributes and orients itself in the different castings.
Throughout this thesis it has been performed a literature study and a large part of practical
laboratory investigations. This involves casting two pieces of full-scale walls from which beams are
cut, 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 concrete
wall with bar reinforcement compared to practical laboratory results shows a clearly lower residual
flexural 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 fibers
accumulate almost like a ball between or just below the reinforcing bars. This leads to very little fiber
reinforcement 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 certain
parts of the fiber-reinforced concrete become significantly weaker than other parts. | |