Technical Data Sheet
Greaghnagee Quarry, Ireland
34 Ashfield Rd, Clogher, Co. Tyrone, BT76 0HL. N Ireland.
Contact : Greaghnagee Quarry
Tel. 028855 48095 Fax. 028855 48303
Grid reference : —- —-
Compiled May 2000
This data sheet was compiled by the Building Research Establishment (BRE). It is based on data from current tests at BRE (2000). The data sheet was compiled in May 2000. The work was carried out by BRE as part of a Partners in Technology Programme funded by the Department of the Environment, Transport and the Regions and Greaghnagee Quarry and does not represent an endorsement of the stone by BRE.
The land comprising Greaghnagee quarry is a recent acquisition and work has recently started to extract the sandstone (1999) from a small 4 acre pit on the green field site. The stone is very similar to local material and at present supply is largely confined to the locality of the quarry. Presently there are only facilities for extracting blocks at the quarry. Block sizes are of the order 0.5 x 0.5 x 1.0 (0.5 m on bed).
Greaghnagee sandstone is buff coloured with a pale grey weathered rind.
Expected Durability and Performance
It is important that the results from the individual tests are not viewed in isolation. They should be considered together and compared to the performance of the stone in existing buildings and other uses. Sandstone is traditionally acknowledged as generally being a very durable building and paving stone and has been used extensively in many towns and cities in the UK and abroad. Greaghnagee sandstone is a newly opened quarry similar to the local stone which appears to be a durable stone. The acid immersion test indicates that Greaghnagee that will have good resistance to acid rain. In addition, the negligible weight loss in the sodium sulphate crystallisation test indicates good resistance to salt damage (for example in coastal locations or from de-icing salts). From the frost test the stone should also have good frost resistance. The flexural strength of the stone is high for a sandstone. The high density and flexural strength indicate that the stone should be suitable for use in heavilty trafficked areas.
Overall, Greaghnagee sandstone should be suitable for use in most aspects of construction including flooring, paving, load bearing masonry and cladding. The traditional use of the stone has been for dry stone walling, gate pillars, lintels and sills.
Test Results – Greaghnagee Sandstone
(Test methods Note 1 = EN1341, Note 2 = EN 1342, Note 3 = EN 1341 /BRE 141, Note 4 = BRE 141)
Tests were carried out at BRE in 1997. N.D. = not determined