lasivahvistettu

Lasivahvistettu is a Finnish term used to describe materials that are reinforced with glass fibers or glass components. In practice the phrase is applied to several families of composite materials where a glass-based reinforcement is embedded in a matrix to improve strength, stiffness and durability. The most common references are glass fiber reinforced polymers (GFRP) and glass fiber reinforced cementitious composites.

In glass fiber reinforced polymers, glass fibers (typically E-glass or S-glass) are embedded in a resin matrix such as epoxy, polyester or vinyl ester. In cementitious systems, glass fibers are incorporated into concrete or mortar to form lasikuituvahvistettu betoni or similar materials. Manufacturing methods vary: pultrusion and filament winding produce long, continuous-fiber components; hand lay-up, spray-up and resin transfer molding create complex shapes; GFRC (glass fiber reinforced concrete) often uses a cementitious mix sprayed onto a glass fiber mat. Material properties depend on fiber type, orientation, and the fiber–matrix interface.

Advantages include higher tensile strength and stiffness, good corrosion resistance, and reduced weight compared with metal or pure cement. Limitations can include moisture sensitivity for certain matrices, potential brittleness if the resin system is not well chosen, and recycling or end-of-life disposal challenges for fiber-reinforced composites. Durability under UV exposure and temperature variation also influences performance in outdoor applications.

Typical applications span construction (panels, façades, cladding, pipes) as well as industrial parts in automotive and aerospace sectors. Standards and testing for lasivahvistettu materials address tensile, flexural and impact properties, along with fire performance and long-term durability.