Kuru Grey, Kurun harmaa graniitti

References

Granite wall on the slope
Granite bench in the park

























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Quarrying Company

Tampereen Kovakivi Oy

Layout updated: 2017-10-06 4:52

content updated: 2017-01-29 13:12:27

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.

Finnish Natural Stones | Kuru Grey, polished
Kuru Grey, polished

Quarrying place, address/coordinates (EUREF-FIN geographical)

Niemikylä, Hirvilahdentie 154, Ylöjärvi 1968

Technical properties

EN_13755 Water absorption

0.15

%  
EN_1936 Apparent density

2630**

kg/m3  
  Open porosity

0.4**

kg/m3  
EN_12372 Flexural strenght Fresh material

19.8**

MPa  
  Min. expected value

19.0**

MPa  
  After 56 freeze-thaw cycles, with 1%NaCl 18.4** MPa  
  Min. expected value 17.7** MPa  
EN_12371 Frost resistance, change of flexural strenght

+8.6

%  
EN_1926 Compressive strenght Fresh material

216**

MPa  
  Min. expected value

174**

MPa  
  After 56 freeze-thaw cycles, with 1%NaCl 208** MPa  
  Min. expected value 143* MPa  
EN_14157 Abrasion resistance

18**

mm  
EN_13364 Breaking load at dowel hole

3450

N  
  Min. expected value

2350

N  
EN_14231 + CEN/TS 16165 Annex C Slip resistance Dry surface    
  Wet surface    

** Tested in 2016; otherwise 2006

Mineral content

Plagioclase

32.6

Wt%
Quartz

31

Wt%
K-feldspar

30.8

Wt%
Biotite

3.5

Wt%
Muscovite

1.2

Wt%
Accessory minerals

0.9

Wt%

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