Glass fibre reinforced concrete is a concrete in which a textile reinforcement made of glass fibres is used instead of the usual iron/steel reinforcement, which can absorb the tensile forces.
The invention of alkali-resistant glass fibres (so-called AR fibres) in the 1980s made it possible to replace asbestos and use glass fibre reinforced concrete across the board. Glass fibers in the form of short fibers are added to the concrete. Depending on the fibre content, a distinction is made between glass fibre reinforced concrete and glass fibre-modified concrete.
Image: Example of macro fibers - Master Builders Solutions
Glassfiber concrete is a glass fiber content of between 2.5 and 5 percent by volume. The glass fibres thus take over the functions of reinforcement, which also does not require any "minimum cover", as the glass fibre does not rust in contrast to conventional reinforcement. The minimum thickness can thus be reduced to a few millimeters, which makes extremely slim components possible.
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