PORPHYRY: technical characteristics

Porphyry is a volcanic rock which takes its origin from the so-called “Atesine Porphyric Platform”, a result of alternate eruptive and stable phases started 260 million of years ago. Porphyry is extracted from an ignimbrite unit called “ryolite”. Its main feature is that it is the only stone presenting a quarry natural surface. Thanks to its chemical composition (over 70% silica, 14% alumina, 8% alkali) and its technical characteristics (high resistance to compression, deformation, abrasion and to the chemical agents) porphyry has become one of the most important materials for paving and facing in Europe. Even in special and complex architectural projects, it always assures amazing results.

Porfidi Paganella mines one of the qualitatively best products in the Trentino porphyry range:

 

The Trentino Montegorsa porphyry

This fascinating product is marked out by a high compression breaking point, a high sliding and rolling friction, and a warm colour (rose-grey mixed accentuated with the passing of time).

  NORMSW    
Gelo

UNI EN 12372:2001
UNI EN 12371:2003

Resistance to deformation (bending) after freeze/thaw cycles

 17,9 Mpa
Gelo UNI EN 1926:2000
UNI EN 12371:2003		 Compressive strength after freeze/thaw cycles 135 Mpa
compressione UNI EN 1926:2000 Compressive strength 161 Mpa
scivolamento UNI EN 1341:2003
App. "D" / UNI EN 1342:2003 App. "C"		 Resistance to sliding friction on not polished surface 68 USRV
imbibizione UNI EN 13755:2002 Coefficient of absorption 0,70%
abrasione UNI EN 14157:2005 Resistance to abrasion 14,8 mm