Portland
Anthracite smooth
Its hallmark is the smooth surface of the face and the color of muted blackness, obtained by engobing.
It fits modern buildings and minimalist projects, but can become an inspiration to create interesting objects in other styles. In addition, it is an excellent material for clinker chimneys, especially if you choose a dark roof covering, e.g. black or gray. Just like the other Röben bricks, it is characterized by longevity, durability and resistance to external factors, including water, frost, wind and fire.
- Remarkable and original coloration and texture
- Smooth face surface
- Perfect for minimalist projects
- Excellent technical parameters
Technical data
Dimensions of a brick NF
240 x 115 x 71 mm
The total area of perforation
>15% ≤ 50%
External wall
21 mm
Bulk density of brick NF i LDF
1500 kg/m3
Bulk density of brick VNF i VLDF
2300 kg/m3
Bulk density of brick NF SP
1650 kg/m3
Bulk density of brick 7-S
1900 kg/m3
Bulk density of brick XLDF
1600 kg/m3
Strength of brick NF, NF SP, LDF, XLDF
≥35 N/mm2
Strength of brick 7-S, VNF, VLDF
≥45 N/mm2
Absorbability
to 6%
Frost resistance
category F2
Acid resistance
+
Alkali resistance
+
Coefficient of thermal conductivity of brick NF, LDF, XLDF
P = 50% - 0,37 W/mK
P = 90% - 0,43 W/mK
P = 90% - 0,43 W/mK
Coefficient of thermal conductivity of brick NF SP i 7-S
P = 50% - 0,45 W/mK
P = 90% - 0,51 W/mK
P = 90% - 0,51 W/mK
Coefficient of thermal conductivity of brick VNF, VLDF
P = 50% - 0,72 W/mK
P = 90% - 0,79 W/mK
P = 90% - 0,79 W/mK
Available formats
Brick NF
Brick LDF
Brick XLDF
Brick NF-SP
Brick VNF
