Vratza has the characteristics making it limestone unique for aesthetic value, use versatility and technical performance. Vratza is a compact, homogenous stone, sedate in its warm cream color and durable through time and indubitably immune to rain and frost. Vratza limestone features great aesthetic uniformity, both in color and in pattern.
The stone has absolutely safe physical and stress resistance parameters. In many ways they are superior to the stones of a similar type. These parameters make for full- field use of it both indoors and out, even in environmental conditions considered harsh for calcareous materials.Vrtaza stone has no need of reinforcement of resin treatment.
A lot of projects around the world have been successfully realized with Vratza limestone, used in various types of products and in the most varied climatic- environmental conditions.Vratza limestone has always been considered a material suited even for prestigious designs destined to last through time.
A Vein 1
Cream Flower – Vein
Cream Flower
Cream Color
Cream
Cream Light
Vratza Grey
Vratza Beige
Classic
Vratza Grey – Vein Cut
Technical Information
Physical properties
Characteristics |
Value | |
---|---|---|
Density |
g/cm³ | 2.37 |
Specific density |
g/cm³ | 2.70 |
Pore volume |
% | 12.22 |
Pore coefficient |
% | 0.139 |
Water absorption |
% | 3.15 |
Compressive strength in dry conditions | x105 Ра | 831,1 |
Compressive strength in water saturation | x105 Ра | 748,8 |
Compressive strength in frozen conditions | x105 Ра | 699,5 |
Frost-resistance coefficient | - | 0.84 |
Wearing according "Deval" | % | 4.20 |
Loose of weight after 25 cycles of freezing | % | 0,08 |
Mineralogical composition (weight%)
Characteristics |
Value | |
---|---|---|
Calcite |
% | 93 |
Dolomite |
||
Quartz |
% | 3,80 |
Chemical analysis (weight%)
Characteristics |
Value | |
---|---|---|
CaO |
% | 48,00 |
MgO |
% | 0,40 |
SiO2 |
% | 16,80 |
Fe2O3 |
% | 0,30 |
Al2O3 |
% | 0,80 |
Mechanical Properties - DRY condition
Characteristics |
Value | |
---|---|---|
Compresive strength parallel -
dry (ASTM C170) |
psi | 13,521 |
Modulus of Rupture parallel -
dry (ATSM C99) |
psi | 1,949 |
Flexural Strength dry
perpendicular (ASTM C880) |
psi | 1,851 |
Bent Bolt Anchor Pullout test
(ASTM C1354) |
psi | 1,366 |
Pin Clip Anchor Pullout test
(ASTM C1354) |
psi | 557 |