Technical Data Sheet
Cotswold Hill Quarry Cream (Bed 2 – White Guiting)
Cotswold Hill Stone Ltd
Cotswold Hill Quarry, Ford, Cheltenham, Glos.
Contact : Cotswold Stone Quarry Ltd
Tel. 01386 584 384 Fax. 01386 850 034
email: [email protected]
Grid Reference: SP 4082 2296
Compiled September 1999
This data sheet was compiled by the Building Research Establishment (BRE). Where possible, data collected in earlier surveys has been used to help interpret the test results. The data sheet was compiled in September 1999 using the results of tests carried out to the proposed European Standards. 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 Cotswold Hill Quarry and does not represent an endorsement of the stone by BRE.
The quarry is at Ford which is north-west of Stow-on-the-Wold on the B4077, The quarry has been in production since 1981 but there are many old working nearby. The overall depth of the face is 24m. There is a large amount of overburden within which is a creamy coloured bed of walling stone. There are then five beds of building stone of which only the middle three are supplied. Available reserves are in excess of 1500m3. The maximum blocks size at the quarry is 2000mm x 1500mm by 900mm height on bed with the largest sawn slab size as 2000mm x 610mm x 900mm height on bed.
The stone is an oolithic limestone and the beds are part of the Inferior Oolite of middle Jurassic age.
Expected Durability and Performance
It is important that the results from the sodium sulphate crystallisation tests are not viewed in isolation. They should be considered with the results from the porosity and water absorption tests and the performance of the stone in existing buildings. Stone from the Cotswold region is traditionally used as building stone in the region and increasingly in many other towns and cities in the UK. The high water absorption and porosity indicate a very open stone that will have good resistance to weathering. The sodium sulphate crystallisation result also indicates that the stone will have good resistance to salt damage and that it will perform well in all but the most exposed locations where it may it may require some extra protection or careful design and detailing to shed water. The strength is towards the lower end of the range for limestones but the performance should satisfactory if the relevant British Standards are followed.
The abrasion resistance is low and so the stone should be used in lightly trafficked areas.
Cotswold Hill Cream (Bed 2- WhiteGuiting)
(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