Grey - Gneiss
Switzerland
Item Details
Quarry Location:
Hinterrhein, Graubünden
Water Absorption:
0.3 %
Density:
2650 kg/m3
Flexural Strength:
19.9 - 20.4 MPa
Compressive Strength:
168 - 170 MPa
Recommended Usage:
Building stone,countertops, sinks, monuments, pool coping, sills, ornamental stone, interior, exterior, wall, floor , paving
Finishing Surface:
Polished, Sawn Cut, Sanded, Rockfaced, Sandblasted, Tumbled
Additional Names:
Silver Grey,Silber Grün,Silber Gruen,Silber Grun Quartzite,Silber Grun Paragneis,Silber Grun Gneiss
Description:
Apparent density: 2650 Kg/mc
Open porosity (by volume): 0,8%
Water absorption (by mass): 0,3%
Flexural strength in natural conditions: 20,4 MPa
Flexural strength after frost test: 19,9 MPa
Compression strength in natural conditions: 170 MPa
Compression strength after frost test: 168 MPa
Abrasion resistance - groove length: 15,5 mm
Slip resistance value - sand blasted (dry): 69 (SRV)
Slip resistance value - sand blasted (wet): 66 (SRV-USRV)
Breaking load at dowel-hole: 2620 N
Breaking load at dowel-hole, maximum fracture distance: 48 mm
Petrographic definition: quartzitic paragneiss
(POLITECNICO DI TORINO)