Kuru Black – Tampereen Kovakivi Oy

Kuru Black is a fine and medium-grained, non-foliated black diorite with shades of grey or white stripes. The diorite is suited for all interior and outdoor uses.

Surface finish

Polished, matt polished, flamed, bush hammered.

Quarrier

Tampereen Kovakivi Oy

Location of quarry

Lehmusjärven louhimo, Lehmustie 409, 34300 Kuru
61.889722, 23.837670

Category:

Description

Technical properties

EN_13755 Water absorption 0.03 %
EN_1936 Apparent density 2880** kg/m3
EN_1936 Open porosity 0.1** %
EN_12372 Flexural strength, fresh material 20.1** Mpa
EN_12372 Flexural strength, fresh material, min. expected value 17.6** Mpa
EN_12372 Flexural strength, frost resistance, 1% NaCl* 20.3** Mpa
EN_12372 Flexural strength, frost resistance, 1% NaCl, min. expected value* 17.8** Mpa
EN_1926 Compressive strength, fresh material 196** Mpa
EN_1926 Compressive strength, fresh material, min. expected value 156** Mpa
EN_1926 Compressive strength, frost resistance, 1% NaCl* 181** Mpa
EN_1926 Compressive strength, frost resistance, 1% NaCl, min. expected value* 141** Mpa
EN_14157 Abrasion resistance 15** mm
EN_13364 Breaking load at dowel hole 4100 N
EN_13364 Breaking load at dowel hole, min. expected value 2742 N
EN 14231 + CEN/TS 16165 Annex C, Slip resistance Dry test
EN 14231 + CEN/TS 16165 Annex C, Slip resistance Wet test

* After 56 freeze-thaw cycles
** Test done year 2016, other results year 2006

Mineral composition

Plagioclase 38.3 Wt %
Amphibole 23.9 Wt %
Biotite 14.4 Wt %
Ilmenite 6.4 Wt %
Magnetite 4.9 Wt %
Clinopyroxene 4.8 Wt %
Apatite 3.7 Wt %
Quartz 2.5 Wt %
Others 1 Wt %

Mineral composition defined according to the EN 12407

Additional information

Surface finish

Polished, Matt polished, Flamed, Bush hammered