PIEDRA LAJA NEGRA
Allgemeine Informationen
| Trading names | PIEDRA LAJA NEGRA, RUFO BLACK |
| Location where found | Lavalleja / Minas / nö Montevideo |
| Country | Uruquay | Coloring | black |
| Structure | layered or directional |
| Availability | Is being mined, but is used very seldom. |
Gestein
| Bezeichnung | Phyllite |
| Alter | Precambrian |
| Gesteinsgruppe | Metamorphic rocks |
Technische Eigenschaften
| Polish quality | Polish is possible, but unusual. |
| Suitable for flooring | Suitable. However, the high abrasion resistance of hard stone is not achieved |
| Acid resistant | Individual mineral ingredients are not permanently acid resistant! |
| Frost resistant | frost resistant |
Technische Daten
| Bulk density | 2,78 t/m³ |
| Reindichte | 2,78 t/m³ |
| Pressure resistance | 191-116 MPa |
| Abriebfestigkeit | 20,6 cm³/50cm² |
| Bending strength | 50,9-64,1 MPa |
| Water absorption | 0,06 Gew.-% |
| Porosity | 0,19 Vol.-% |
Mineralbestand
| Dolomite | 36,5 % |
| Calcite | 0,9 % |
| Quarz | 28,4 % |
| Sericite | 11,4 % |
| Clay | 15,6 % |
| Chlorite | 6,7 % |
INSK – Internationale Naturstein-Kartei
| INSK Number old | 10.2.34 |
| INSK Number | 56.15 |
Care information from Möller-Chemie
Stain removal guide:
Recommendations for bonding and filling
Productfinder bonding / filling:
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