building research establishment test results
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In September/October 2002 the Building Research Establishment undertook a comprehensive range of tests on Mine Train Quarry sandstone.
Safety in use
slip resistance

BS EN 1341:2000 Slabs of natural stone for external paving (E)

85 Wet (sawn finish)values >40 are considered safe
abrasion resistance

BS EN1341:2000 (D) Slabs of natural stone for external paving

BS EN 1342:2000 (D) Setts of natural stone for external paving

19.9 mmvalues <23 are considered suitable for use in heavily trafficked areas
strength under load
compressive strength

BS EN 1926:1999

110 Mpa (110 N/mm2)loaded perpendicular to the bedding plane @ ambient humidity
Flexural strength

BS EN 12372:1999

15.8 Mpa (15.8 N/mm2)loaded perpendicular to the bedding plane @ ambient humidity
resistance to frost
flexural strength after freeze-thaw

BS EN 12372:1999

20 Mpa (20 N/mm2)loaded perpendicular to the bedding plane @ ambient humidity
porosity & water absorption
porosity

BRE 141

7.86%
saturation coefficient

BRE 141

0.7
water absorption

BRE 141

2.22% by weight
density2479 kg/m3
resistance to salt
salt crystallisation

EN 12370

-0.33%The negative value denotes a weight gain.
Discussion of the Results
The results show that the Pennant Sanstone is a dense, strong and hard sandstone with relatively little water absorption.
Abrasion resistance results suggest that it could be used in areas that are heavily trafficked such as airports and shopping malls. It should be able to withstand 500 million pedestrian journeys during a 20-year service life for a floor.
Slip resistance has been classed as excellent.
Frost resistance testing has shown the pennant sandstone to be Class 1 frost resistant as defined by EN 1341:2001 (E).
Salt Crystalisation testing has shown pennant sandstone to be resistant to damage by salts. There was no damage and the small increase (-) is due to salts on the surface of the samples at the conclusion of testing.
To compare Mine Train Quarry sandstone with other BRE tested UK sandstones go to the Building Research Establishment website by clicking here BRE stone list




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