Cambridge Masonry Ltd.
Station Road
Longstanton
Cambs.
CB4 5FB
01954 261 907
01954 260 847
Sandstone
Woodkirk Sandstone - Sawn Texture
Petrographic Description (EN 12407:2001)
Woodkirk Sandstone is from the Coal Measures of the Carboniferous Age. It is a fine-grained stone, grey-buff to light brown, but tends to darken to a richer colour as it ages.
| Silica (SiO2) | 80.66% |
| Sodium Oxide (Na20) | 0.75 |
| Sulphate (SO3) | 0.04 |
| Ferrous Oxide (FeO) | 2.27 4.37 as (Fe203) |
| Carbonate (CO2) | 0.52 |
| Ferri( Oxide (Fe2O3) | 1.85 |
| Calcium Oxide (CaO) | 0.46 |
| Magnesium Oxide (MgO) | 0.90% |
| Alumina (Al203) | 7.84 |
| Potassium Oxide (K20) | 0.81 |
| Phosphate (P2O5) | 0.01 |
| Manganese Oxide (MnO) | 0.07 |
| Titanium Oxide (TiO2) | 0.40 |
|
Loss on Ignition including moisture |
3.41 |
PHYSICAL PROPERTIES
Tests administered by R.H. Stanger Laboratories
or West Riding of Yorkshire County Council Laboratories Ltd, UK.
| Slip Resistance Dry | 82 (Category D - Excellent) |
| (PendulumMethod) Wet | 76 (Category D - Excellent) |
| Density | 2,400 Kg/M3 |
| Specific Gravity | |
| (a) Oven Dry | 3.32-2.34 |
| (b) Saturated/Surface Dry | 2.40-2.42 |
| (c) Apparent | 2.54-2.57 |
| Compressive Strength |
54 MN/m2 S4 – 105 MN/M2 |
| Water Absorption | 4% by weight after 24 hours immersion at 20°C |
| Moisture Movement Drying Shrinkage | 0.035% |
| Wetting Expansion | 0.035% |
| Thermal Expansion | Linear Coefficient 8.8 x IO-6 per°C |
| Thermal Conductivity | |
|
(a) Measured at 2.03% moisture v/v |
1.45 W/m°C |
| (b) Calculated Dry | 0.967 W/m°C |
|
(c) Calculated at 3% moisture v/v |
1.54 W/m°C |
| Durability | |
| (a) Freeze thaw test | Indicates that failure because of frost action is unlikely. |
| (b) B.R.E. Sodium Sulphate Test | Average weight loss 1.01 % Slight cracking on 3 out of 6 samples |
| (c) Acid Immersion Test | BS 3798 of 1964 Close bedded samples unaffected |
| °U° Values in typical Wall construction | |
| 100mm stone outer leaf, 50cm cavity, inner skin of materials shown below at (a), (b), (c) and 15mm plaster:- | |
|
(a) 100mm Thermalite (700kg/M3) |
1.02 W/m°C |
|
(b) 100mm Concrete (900 kg/M3) |
1.21 W/m°C |
| (c) 100mm Brick | 1.62 W/m°C |
Department of Mining and Mineral Engineering
| Point Load Strength (T500) 4.7-5.1 MPa MEAN 4.98 MPA x 12.51 CT500 | 62.25 MPA | |
| Direct Tensile Strength | Mean of cylinders and shaped pieces | 3.33 MPA |
| Modulus of Rupture | Discs as square beams | 7.32 MPA |
| (Flexure) 3 point | Cylindrical Beams | 10.66 MPA |
| Shear Strength | Punched Mean | 13.40 MPA |
| Straight Shear Calc. as single sided shear Mean | 12.40 MPA | |
© 2007 Cambridge Masonry Ltd