ROBRATO
Allgemeine Informationen
| Trading names | ROBRATO, TORRAO, PORFIRO ACIDO |
| Location where found | Torrao / Alcacerdo Sal / Setubal |
| Country | Portugal | Coloring | reddish brown |
| Structure | Largely without direction |
| Availability | Available |
Gestein
| Bezeichnung | Rhyolite |
| Alter | New late Palaeozoic |
| Gesteinsgruppe | Volcanic rock |
Technische Eigenschaften
| Polish quality | Polish possible. |
| Polish durability | The polish is durable for exterior use. |
| Suitable for flooring | Suitable |
| Acid resistant | The stone is resistant to acid under usual circumstances. |
| Frost resistant | frost resistant |
Technische Daten
| Bulk density | 2,64 t/m³ |
| Pressure resistance | 143 MPa |
| Druckfestigkeit Frost | 153 MPa |
| Abrasion resistance according to Italian standard | 0,3 |
| Bending strength | 37 MPa |
| Water absorption | 0,12 Gew.-% |
| Porosity | 0,31 Vol.-% |
| Thermische Dehnung | 0,78 mm/m/100K |
INSK – Internationale Naturstein-Kartei
| INSK Number old | 5.1.21 |
| INSK Number | 33.9 |
Stain removal guide:
Recommendations for bonding and filling
Productfinder bonding / filling:
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