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Technical Data

Type Carboniferous Sandstone
Origin Morley, Leeds, West Yorkshire
Colour Grey/Buff when newly
quarried, weathers into
buff/brown
Texture Fine Grained
Density 2,400kg/m2
Compressive Strength 54-105 MN/m2
Maximum Size 15 Tonnes
Abrasion 21.1mm

CHEMICAL ANALYSIS

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

54 – 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