Irish Blue Limestone was formed some 340 million years ago as a compact crinoidal limestone with a rich fossil content of mainly brachiopods (shellfish) and polyps. Finely dispersed carbon through the stone mass results in a typical blue-grey colour.
|
Standard |
Mean value +/- standard deviation |
||
|
Density |
EN 1936 |
2680 +/- 8 |
kg/m³ |
|
Porosity |
EN 1936 |
0,4 +/- 0,1 |
% vol |
|
Waterabsorption under atmospheric pressure |
EN 13755 |
0,11 +/- 0,02 |
% weight |
|
Compressive strength |
EN 1926 |
137 +/- 13 |
MPa |
|
Flexural strength |
EN 12372 |
15,2 +/- 2,3 |
MPa |
|
Wear resistance |
EN 14157 |
19,2 +/- 0,8 |
mm |
|
Frost resistance |
EN 12371 |
168 cycles |
Over 98% Calcite, 0.7% Dolomite, 0.7% Quarts, 0.2% organic Carbon, Less then 0.1% Iron Sulfite
Due to its extremely low Iron composite content, Irish blue limestone is suitable for use in pressurized urban or industrial environments without risk of compromising the stone through brown discolouration or staining.
