Parameters
|
| Description |
|
|
Vermiculate board paper surface |
| Dimension of boards |
|
mm |
1200 x 2400 x 16 |
| Bulk density |
|
kg/m3 |
480 |
| Tolerance of thickness |
|
mm |
+-0,3 |
| Tolerance of format |
|
mm |
+-2 |
| Reaction to fire acc. to EN 13 501:1 |
|
|
A1, non-combustible |
| Index of spreading flame of surface i S with paper |
|
mm/min |
26, 80 |
| Water absorbtion acc. to EN 12 087 |
|
g/cm3 |
2hrs - 0,12, 24 hrs - 0,28, 48 hrs - 0,48 |
| Bending strength (straight and cross direction) |
|
MPa |
thickness 16 mm - 8,10 |
| Cold compressive strength at def. of 10 % |
|
MPa |
2,95 |
| Screw-resistant extraction EN 320 with paper |
|
N |
thickness 16 mm - 450 |
| Sound insulation acc. to EN ISO 140-3 |
|
dB |
thickness 16 mm - 28 |
| pH factor |
|
|
5,5 |
| Coefficient of gas diffusion |
|
|
1,5 . 10-7 m2 |
| Thermal conductivity at 20 oC |
|
W/mK |
0,17 |
| Thermal length change |
|
m/mK |
8,5 . 10-6 |
| Moisture content (in foil) |
|
% |
4 - 8 |
| Chemical analysis: |
Al2O3 |
% |
9,10 |
| SiO2 |
% |
54,75 |
| MgO |
% |
23,48 |
| Alkali |
% |
5,21 |