Astoria Grey Marble, Greece Grey Marble

MINERALOGICAL COMPOSITION
CALCITE 98% CHLORITE
DOLOMITE 2% CHROMITE
QUARTZ HEMATITE
MUSCOVITE CLAYS
SERICITE
CHEMICAL ANALYSIS (Weight %)
CaO 54,5 K20 0,01
MgO 0,7 Na2O 0,01
SiO2 0,7 MnO 0,01
Fe2O3 42,8 CO2
Al2O3 0,21
PHYSICAL AND MECHANICAL PROPERTIES
APPARENT SPECIFIC
WEIGHT Kg/m3 2711Kg/m3 MODULUS OF RUPTURE
din 52 112, (wet position) 17,83 MPa
(182kg/cm2)
ABSORPTION
COEFFICIENT wt% din 52 103 0,08% MODULUS
OFELASTICITY
(ASTM C-170) 22,60 GPa

COMPRESSIVE
STRENGTH Kg/cm2
din 52 105,( dry position) 89,41 N/mm2
(912 kg/cm2) COMPRESSIVE
STRENGTH AFTER FROST (din 52 104 & din 52 105) 71,85N/mm2
(1722kg/cm2)
COMPRESSIVE
STRENGTH Kg/cm2
din 52 105,( wet position) 71,59N/mm2
(730kg/cm2) ABRASION RESISTANCE according to Boehme (din 52 108) 2,26 mm
MODULUS OF RUPTURE
din 52 112,( dry position) 18,20 MPa
(186kg/cm2) MICROHARDNESS KNOOP (UNI - U.32.07.248.0) 40 cm