GRISSAL
Visual description
Gray igneous rock with the presence of bluish tones and medium-coarse grain size.
Finishes
Polished, flamed, bush-hammered, sand blasting, sawn, brushed, honed, …
Formats
Suitable for slabs, tiles, cobblestone and all kind of custom commercial pieces.
Applications
Universal use: inside and outside.
physical-mechanical characteristics
UNE-EN 12407 Petrographic examination: Biotitic granite
UNE-EN 1936 Apparent density: 2640 kg/m3
– Open porosity: 1,00%
UNE-EN 13755 Water absortion at atmospheric pressure: 0,3%
UNE-EN 14157 Abrasion resistance: 15,3 mm
UNE-EN 13364 Breaking dole at dowel hole: 2000 N
UNE-EN 1926 Compression strength: 167 MPa
UNE-EN 12372 Flexion strength (Rf): 14,1 MPa
UNE-EN 14066 Resistance to ageing by thermal shock:
-Resistance to ageing by thermal shock (Mass variation): -0,03%
-Variation of dynamic elastic mod:- 21,70%
-Visual alterations:None
UNE-EN 14231 Slip resistance (polished):
-Dry test (SRV): 61
-Wet test (SRV): 8
UNE-EN 12371 Frost resistance:
– Variación RF (12 cycles): 3,2%