Features
Processing
Quarries

Porphyry stone is extracted in Bienno (Brescia).

Our company produces the Porphyry Valcamonica exclusively for four generations, and all this time was able to perform important work in various parts of the world, such as buildings lined at "Defense" in Paris, the railway station link connecting to Milan Subway. The floors of the new offices at the Treasury in Rome. And many more.

Here are the physical and mechanical characteristics, as detected by the Politecnico di Milano showing the special qualities of our
Porphyry Valcamonica for hardness, frost resistance, resistance, etc..
For its quality is used both internally and externally, work in bright or iridescent.


Characterization of “vallecamonica porphyry” Flamed
Physical-mechanical characteristics

Specific weight kg/m 2676
Weight per unit of volume kg/m 2647
Porosity % 0.85
Porosity accessible to water % 0.32
Imbibition coefficient

1.6

Compression breaking load: Normal to orientation MPa 296
Compression breaking load: Parallel to orientation MPa 267

Compression breaking load after saturation: Normal to orientation

MPa

246

Compression breaking load after saturation: Parallel to orientation MPa 280
Ultimate tensile strength MPa 33

Impact test: minimum fall height

cm

85

Coefficiente di dilatazione lineare termica

mm/ml/°C

0,0076

Frictional wear test (amsler tribometer) Relative to san fedelino granite

mm/km

1,79

Frictional wear test (amsler tribometer) mm/km 2,1
Thermal linear expansion coefficient 10-6\ç 8.1
 
 
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