Grey - Sandstone
United Kingdom
Item Details
Quarry Location:
Lancashire
Water Absorption:
2.9 % by wt
Density:
2357 - 2523 Kg/m3
Flexural Strength:
15.7 - 16.3 MPa
Compressive Strength:
110.24 - 137.8 MPa
Recommended Usage:
Exterior - Interior wall and floor applications, fountains, pool and wall capping, stairs, paving
Finishing Surface:
Sawn Cut, Sanded, Rockfaced, Sandblasted, Bushhammered, Tumbled, Thermalled, Natural Cleft, Weatheredge
Additional Names:
Dunhouse Grey Buff Sandstone,Dunhouse Grey, Dunhouse Blue Sandstone,Dunhouse Blue
Description:
Dunhouse Blue Sandstone is a very fine grain non-clacareous, slightly micaceous, bluish- grey and is extremely durable due to its high strength and low porosity. Geologically it is classified as a meso-micro crystalline arenite from from the Millstone Grit of Carboniferous age.
Finishes available:Sawn Cut, Sanded, Rockfaced, Sandblasted, Bushhammered, Tumbled, Thermalled, Natural Cleft, Weatheredge
Dunhouse Blue Sandstone can be commonly used; Exterior - Interior wall and floor applications, fountains, pool and wall capping, stairs, paving.
Test Results Dunhouse Grey
Safety in Use
Slip Resistance (Note 1)
83
Wet Values > 40 are considered safe.
Abrasion Resistance (Note 1)
Not Tested
Values <23.0 are considered suitable for use in heavily trafficked areas
Strength under load
1) Compression(Note 2)
137.8 MPa
Loaded perpendicular to the bedding plane ambient humidity
2) Bending (Note 1)
17.1 MPa
Loaded perpendicular to the bedding plane ambient humidity
Not Tested
Loaded perpendicular to the bedding plane ambient humidity
Porosity and Water Absorption
1) Porosity (Note 3)
11.7%
2) Saturation Coefficient (Note 3)
0.59
3) Water Absorption
2.9 % (by wt)
4) Bulk specific gravity
2357 kg/m3
Resistance to Frost
Flexural strength after Freeze/Thaw Test (Note 1)
16.3 MPa
Loaded perpendicular to the bedding plane ambient humidity
Resistance to Salt
Sodium Sulphate Crystallisation Test (Note 3)
-1.38% Mean wt loss
Resistance to Acidity
Acid Immersion Test(Note 4)
Pass
(Test methods Note 1 = EN1341, Note 2 = EN 1342, Note 3 = EN 1341 /BRE 141, Note 4 = BRE 141)