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| Kuru
Grey
A grey granite from Kuru.
Kuru Grey is a fine-grained, non-foliated, equigranular
grey granite. There is some variation in colour among blocks
from different quarry sites. All interior and outdoor uses.
Well suited raw material for quarry stone products.
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Variation
in colour: Slight
Weather Resistance: Good
Abrasion Resistance: Good
Quarry sites: Niemenkylä, Kuru; Kapee, Tampere
Quarrying began in the beginning of the 20th century.
Amount of Quarries: 6
| Mechanical Properties |
|
Density |
2660
kg/m3 |
| Water absorption |
0,11
wt % |
| Compressive strength |
300 MPa |
| Flexural strength |
25
MPa |
| Hardness |
6,1 Mohs |
| Mineral composition |
| Potash feldspar |
36% |
| Plagioclase |
21% |
| Quartz |
35% |
| Amphibole,
Micas |
8% |
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