White - Limestone
United Kingdom
Item Details
Quarry Location:
Bowers Quarry, Portland, Dorset
Water Absorption:
5.99 %
Density:
2205 kg/m³
Flexural Strength:
3.94 MPa
Compressive Strength:
44.24 MPa
Recommended Usage:
Exterior, Interior, Wall cladding, Paving
Additional Names:
Coombefield Roach,Portland Roach,Portland Bowers Roach,Portland Stone,Perryfield Roach,Bowers Roach Limestone
Description:
Petrography
The stone is an open textured oolitic limestone from the Portlandian formation (Jurassic). The stone is formed from ooliths in a micrite (fine grained calcium carbonate) matrix. It is an extremely shelly stone with a large number of holes scattered throughout it. The holes are due to the removal of fossil shells by percolating rain. The finer-grained parts of the stone is very similar to Whitbed.
Strength
Compression - BS EN 1926
Average: 44.24 Mpa from 32 tests
Flexural Strength - BS EN 13161
Average: 3.94 Mpa from 140 tests
Breaking Load at Dowel Hole - BS EN 13364
Average: 4,288 N from 30 tests
Durability
Water Absorption - BS EN 13755
Average: 5.99 % from 153 tests
Density - BS EN 1936
Average: 2,205 kg/m³ from 212 tests
Porosity - BS EN 1936
Average: 22.31% from 117 tests
Saturation Coefficient - BS EN 1936
Average: 0.65 from 111 tests
Salt Crystallisation - BS EN 12370
Average: 2.88% from 11 tests
Flooring / Paving
Flooring / Paving - EN14157
Average: 22.5 from 12 tests
Slip Resistance - TRRL Pendulum Test: Grit 120 Filled (Internal Flooring)
Wet Average 85 from 48 tests