Pietra Macigno
Sedimentary lithotype gray heterogeneous looking for the presence of indistinct dark streaks due to local grain size finer, speckled by black individuals also sub millimetric and pearly. The grain is medium, the rock is compact but shows a marked surface porosity.
PHYSICAL-MECHANICAL
U.M. NORMA VAL. MIDDLE DEV. ST.
EN 13755-08 of pressure Atmospheric Water absorption 1.43% 0.06
EN 1936-07 Bulk density KG / m3 2620 40.2
EN 1936-07 Open Porosity% 3.69 0.18
EN 12372-07 Resistance to bending with concentrated load
(Unprocessed) MPa 14.9 2.4
(EN 12371-03 after 48 cycles of freezing) MPa 14.1 2.6
EN 1926-07 compressive strength MPa 90.3 4.9
EN 14231-04 Slip resistance
smooth finish (dry) USRV 67 0.8
smooth finish (wet) USRV 59 3
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