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.
Technical Specifications of Irish Blue Limestone by Kilkenny Limestone
|Technical Specifications||Test||Average Value|
|Apparent Density (kg/m3)||EN 1936||2677|
|Porosity (% vol)||EN 13755||0.10|
|Frost Resistance||EN 12371||Frost Resistant (F1)|
|Thermal Expansion (mm/mK)||EN 14581||0,0055|
|Compressive Strength (N/mm2)||EN 1926||136|
|Flexural Strength (N/mm2)||EN 12372||16.8|
|Wear Resistance (mm)||EN 14157||18.4|
|Ultrasonic Velocity (m/s)||5239|
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.