The
Piedra Maragata
is mined from the quarries of PIEDRAS MARAGATAS S.L. : BRAZUELO and SANTA
COLOMBA DE SOMOZA. This stone is a quarzite cleaved into flagstones with a
different thickness.
Its
origin is metamorphic, from the late Ordovician - Silurian period and made up
from a 70% of quartz, a 20% of Phyllosilicates and a 10 % of redbrown oxides.
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Stone
features: |
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Density |
2.57
gr/cm3 |
|
|
Coefficient
of absorption |
1,03%
|
|
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Compressive
strength |
746
kg/cm2 |
|
|
Flexural
strength |
110
kg/cm2 |
|
|
Resistance
to wear |
3.82
mm |
|
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Impact
strength |
95
cm |
|
|
Resistance
to temperature changes |
0.03
|
|
|
Resistance
to SO2 |
0.11%
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|
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The
thickest flagstones are used on brickwork both on outer works and home
decoration. These flagstones are prepared at the quarry by chipping or snapping
with a shearing maschine to the calculated thickness of 10 cm in order to make
easy the placing work.
They
are sent in sacks or big bags of 1.34 Tm.
The
flagstones with less than 10 cm thickness and with an irregular perimeter are
clasified in two groups: from 1 to 3 cm of thickness and from 3 to 5 cm. They
will be then used in wall cladding and surfacing or floors.
These
flagstones are sold in pallets of 1 m3.