Kuitubetonis

Kuitubetonis is a term of Finnish origin referring to fiber-reinforced concrete. It is a composite material created by incorporating discrete fibers into a concrete matrix. These fibers can be made from various materials, including steel, synthetic polymers (such as polypropylene, polyvinyl alcohol, or polyethylene), glass, or natural fibers. The addition of these fibers aims to enhance the mechanical properties of the concrete, particularly its tensile strength, flexural strength, ductility, and resistance to cracking.

The primary function of the fibers is to bridge the micro-cracks that form in the concrete as it hardens and is subjected to stress. This bridging action prevents the cracks from propagating, thereby improving the overall toughness and durability of the material. The type, size, shape, and volume fraction of the fibers used can significantly influence the performance characteristics of the resulting fiber-reinforced concrete.

Fiber-reinforced concrete finds applications in a wide range of construction projects, including structural elements like slabs, beams, and columns, as well as non-structural elements such as pavements, precast concrete products, and architectural finishes. Its improved performance over plain concrete can lead to thinner sections, reduced construction time, and enhanced longevity of structures. The specific benefits and optimal fiber selection depend on the intended application and performance requirements.