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Quality
certification: |
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ERINSTONE
® meets and even exceeds
the strictest requirements for Blue limestone. |
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Erinstone® is
a natural material that is quarried in a quality controlled
production environment under the ISO9002 certification.
An important part of the stone is exported to Belgium, Holland,
France and Germany. In 1994, Erinstone® was awarded
an ATG-certificate by the Belgian Union for Technical Approval
in the Construction Industry where it was the first natural
stone ever to receive this certificate. In this way Erinstone®
set the standard and proved that product certification for
natural stone under the ATG-system is possible.
ATG certification requires that: |
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• The producer
adheres to a generally
accepted technical
base specification.
• He operates a rigorous quality
control system:
from inspection of raw
products and throughout
the production
process, to the end product.
• Representative
samples of the products have been submitted
to tests and controls by and under
supervision
of an independent expert body.
• These tests and
controls are regularly repeated.
All of
this is done under the supervision of a reputable
certification
body.
• Adjustments are made immediately if necessary,
both in the company and the certification
body,
and that a procedure to correct irregularities
exists. |
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| Technical
Specifications : |
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The following laboratory
tests have been carried out by the WTCB
a member of Eutac |
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apparent
density 2688 Kg/m3 |
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porosity
0.62 %Vol |
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frost resistance
0K |
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thermal expansion
0,0055 mm/mK |
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compressive
strenght 127,6 N/mm2 |
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flexural strength
10,9 N/mm2 |
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wear resistance
3,97 mm/1000m |
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modulus of elasticity
62 N/mm2 |
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scratch test
0,3 mm |
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ultrasonic velocity
5239 m/s |
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Petrographic
and
Lithological Background : |
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Erinstone® ,
Irish Blue Limestone was formed
some 340 million years ago as a compact crinoidical limestone
with a rich fossil content of mainly brachiopods (shellfish)
and polips.
Finely dispersed carbon through the stone mass results
in a typical blue-grey colour.
Chemical composition:
Over 98% Calciet, 0.7% Dolomite,
0.7% Quarts, 0.2% organic Carbon, Less then 0.1% Iron Sulfite
Because of its extremely low Iron composites content,
Erinstone® is suitable to be used under environmental
pressure
of a city or even industrial environment without risk on
brown discolouration and staining. |
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