Bianco Piracema Granite
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Synonyms: Bianco Piracena, Blanco Piracema, Branco Piracema, Kinawa Bianco, Kinawa White, Piracema Bianco, Piracema White, Piricema, White Peracema, White Piracema, White Wave
Location: Bianco Piracema granite is quarried near Piracema, Minas Gerais, Brazil.
Description: Bianco Piracema granite is a light grey-green gneiss or granulite, with little dark red-brown garnets. This stone internationally may be nominated as a granite but in the area of application of the European Standard we are awaiting clarification.
The veining and colour varies considerably and a small sample of Bianco Piracema granite may not be representative of the whole slab therefore swatch samples must be approved for large projects to ensure that the blocks are all extracted from the same quarry face for matching purposes. Ideal for both interior and exterior use, Bianco Piracema granite is frost free and polish constant.
Compression tensile strength: 2080 kg/cm2
Tensile strength after freeze-thaw cycles: 1990 kg/cm2
Unitary modulus of bending tensile strength: 132 kg/cm2
Heat expansion coefficient: 0.0065 mm/m°C
Water imbibition coefficient: 0.004000
Mass by unit of volume: 2620 kg/m3
Gneiss: A common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. Gneissic rocks are usually medium to coarse-foliated and largely recrystallized but do not carry large quantities of micas, chlorite or other platy minerals. Gneisses that are metamorphosed igneous rocks or their equivalent are termed granite gneisses, diorite gneisses, etc.
Granulite: Granulites are metamorphic rocks that have experienced high temperatures of metamorphism. They typically have a granular (granoblastic) texture that is, a texture comprised of similarly sized and shaped grains and hence the name granulite.