Basalt is an igneous rock, mined and melted with no additives, and extruded into filaments. As a result Basalt fibers have alkali chemical resistance and fire resistance better than E-glass. Better mechanical properties have also been documented.
When tested against E-glass and carbon fiber, basalt fiber panels have shown higher tensile modulus and strength. According to a Fraunhofer report, basalt composite showed a 40% higher strength than E-glass, and 20% higher stiffness than the glass composite. Basalt fiber is the perfect choice for applications requiring higher performance than E-glass and a lower price than carbon fiber.
Not all Basalt is the same! Basalt has a crystalline structure that varies based on the specific conditions during the larva flow at each geographical location. Basalt is a combination of three silicate minerals — plagioclase, pyroxene and olivine. Each geographical location results in a basalt with different mineral and chemical levels. So while basalt may be available around the world. Not all basalt is suitable for the manufacture of filaments that are then used in the manufacture of the variety of basalt products available today. Be sure to qualify your source when purchasing basalt products!