TRADITIONAL NAME
OTHER COMMERCIAL NAMES
PLACE OF ORIGIN
PETROGRAPHIC NAME (ACCORDING TO EN 12407)
COLOUR
MACROSCOPIC DESCRIPTION
A METAMORPHIC LITHOTYPE THAT IS HETEROGENEOUS IN TEXTURE AND COLOUR. THE MATERIAL CAN IN FACT VARY IN COLOUR FROM DARK YELLOW TO IVORY WITH SLENDER VEINS THAT ARE WHITE OR OF VARYING SHADES OF OCHRE YELLOW.
BLOCK AND SLAB CHARACTERISTICS
AVERAGE SIZE OF BLOCKS: 2,50-3,20 X 1,30-1,70 X 1,30-2,00 M. SLABS ARE PREFERABLY CUT ALONG THE GRAIN AND AGAINST THE GRAIN, I.E. THE HARD WAY. BEFORE SAWING IT IS RECOMMENDED THAT THE BLOCKS UNDERGO RESIN TREATMENT IN A VACUUM. AFTER THIS THE SLABS CAN BE CUT AT A MINIMUM THICKNESS OF 10 MM.
| STANDARD | U.M. | MEAN VALUE | ST. DEV. | |
|---|---|---|---|---|
| EN 13755-08 | WATER ABSORPTION AT ATMOSPHERIC PRESSURE | % | 0,14 | 0,02 |
| EN 1936-07 | APPARENT DENSITY | KG/M3 | 2700 | 5,2 |
| EN 1936-07 | OPEN POROSITY | % | 0,47 | 0,07 |
| EN 12372-07 | FLEXURAL STRENGTH IN NATURAL CONDITIONS | MPA | 11,6 | 2,5 |
| EN 12371-03 | FLEXURAL STRENGTH EXPOSED TO 48 FROST CYCLES | MPA | 11,6 | 2,2 |
| EN 1926-07 | UNIAXIAL COMPRESSIVE STRENGTH | MPA | 89,6 | 12,9 |
| EN 14231-04 | SLIP RESISTANCE (HONED FINISHING): (DRY) (WET) |
USRV USRV |
29 6 |
3 2 |
| ANTIQUED FINISH | YES |
| SAW FINISH | |
| DIAMOND SAW FINISH | YES |
| ROCK FACE FINISH | |
| RIVEN CUT FINISH | |
| BUSHAMMERED FINISH | YES |
| MACHINE-TOOLED FINISH | YES |
| SCRATCHED FINISH | |
| ABRASIVE FINISH | YES |
| MATT FINISH | YES |
| HONED FINISH | |
| POLISHED FINISH | YES |
| POINT FINISH | |
| RESINED FINISH | YES |
| SANDBLASTED FINISH | YES |
| CHISELLED FINISH | |
| POINTED FINISH | |
| AXED FINISH | |
| REEDED | YES |
| WAXED FINISH | |
| WATERJET FINISH | YES |
A CALCITIC CRYSTALLOBLASTIC LITHOTYPE COMPOSED OF DOMINIONS OF HETEROGENEOUS SIZES AND MICROTEXTURES. SUBHEDRAL CRYSTALS WITH STRAIGHT OR CURVED GRAIN BOUNDARIES ARE PRESENT WITH MICROTEXTURES THAT ARE DIFFERENT IN PLACES. THE BLASTS ARE GENERALLY < 0,1MM, EVEN IF LARGER PORPHYROBLASTS MAY ALSO BE PRESENT. SOME VEINS ARE GENERATED BY THE ALIGNMENT OF THE BLASTS THAT ARE LARGER THAN THE SURROUNDING ONES, WHILE OTHERS ARE COMPOSED OF CALCITIC MICROBLASTS (PROBABLY MICRITIC RELICTS) THAT ARE VERY DEFORMED AND CONVOLUTED. THE MICROCRYSTALS IN THESE AREAS ARE ASSOCIATED TO MICROGRANULATIONS OF OPAQUE MINERALS, RUTILE, ACICULAR MUSCOVITE AND SLIGHT MUSCOVITE AGGREGATES.
THE REFERENCE SAMPLE DOES NOT IMPLY STRICT UNIFORMITY BETWEEN THE SAMPLE ITSELF AND THE ACTUAL MATERIAL; NATURAL VARIATIONS MAY ALWAYS OCCUR. ALTHOUGH ALL EFFORTS HAVE BEEN MADE TO REPRODUCE THE EXACT LIKENESS OF THE MATERIALS, THERE MAY BE SLIGHT DIFFERENCES DUE TO THE PRINTING PROCESS. THE TECHNICAL INFORMATION FOR THE MATERIALS IS BASED ON TESTS CARRIED OUT AT THE MARBLE LABORATORY OF THE POLITECNICO DI TORINO DIPARTIMENTO DI INGEGNERIA DEL TERRITORIO, DELL'AMBIENTE E DELLE GEOTECNOLOGIE AND PROVIDES A REFERENCE FOR THEIR CHARACTERISTICS. NATURAL STONE MATERIALS ARE HOWEVER NATURAL PRODUCTS AND AS SUCH ARE SUBJECT TO VARIATIONS. HENCE IT IS GOOD PRACTICE TO TEST THE MATERIALS EACH TIME THEIR SPECIFIC PHYSICAL-MECHANICAL PROPERTIES ARE REQUIRED.
