Informations about Pietra Piasentina
The Technical Characteristics
Geological characterization
Pietra Piasentina is the name that defines this type of sedimentary calcareous rock having a secondary origin substantially due to its compaction and re-cementing of pre-existent calcareous materials.
Pietra Piasentina belongs to carbon blocks which give birth to the succession of powerful Flysch of Grivò, triggered by the processes of tectonic movements.
Petrographic Constitution
vp>Pietra Piasentina may be petrographically classified as a bio-sparite thus tending towards a finer granulometry that is included in biomerites. Pietra piasentina is a calcareous stone.Physical and mechanical
Pietra Piasentina is used indiscriminately both for exterior and interior applications, this is due to its exceptional features:
- extremely compact stone,
- low-water absorption coefficient,
- very high stress-load resistance even after gelivity,
- good resistance to bending and stress-load,
- unvarying colour even in presence of severe weather conditions.
Features appearance
Pietra Piasentina presents a grey background nuance with white veins and more nuances tending to brown.
The stone responds to different surface finishes with colour tones ranging from the light grey of the sawn surface finishing to the dark grey of the polished finish, thus making the same material versatile and suitable for many applications.
In Italy there are no similar types of stones that can be considered truly similar to Pietra Piasentina. It can be processed in small and large thickness and it is versatile for any type of application from decorative purposes to building construction.
| Average value | |
|---|---|
| Tests carried out at the Polytechnic Institute of Turin, the department of "Georisorse e Territorio". | |
| Volume weight | 2690 Kg/m3 |
| Water absorption | 0,21 % |
| Stress load (due to sole compression) | 145 MPa |
| Stress load (due to sole compression following gelivity) | 144 MPa |
| Elastic tangential module | 72.600 MPa |
| Stress load (due to indirect tration following bending) | 30 MPa |
| Close friction wear (reference to San Fedino granite) | 0,58 |
| Shock resistance (minimum fall height) | 36 cm |
| Thermal linear dilatation coefficent | 6,6 x10-6/°C |
| Knoop micro-hardness | 1830 MPa |
| Non-uniform hardness index | 1,35 |
| CaCO3 | 93,90 % |
| MgCO3 | absent |
| FeCO3 | 1,30 % |
| Insoluble residue | 4,52 % |
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