White - Limestone
United Kingdom
Item Details
Quarry Location:
Bowers Quarry, Portland, Dorset
Water Absorption:
7.36 %
Density:
2082 kg/m³
Flexural Strength:
5.23 MPa
Compressive Strength:
37.70 MPa
Recommended Usage:
Exterior, Interior, Wall cladding, Paving
Additional Names:
Portland Whitbed,Portland Bowers,Portland Bowers Whitbed,Bowers Whitbed Limestone
Description:
The stone was classified as a moderately sorted, moderately compacted, clast supported Oosparite Limestone. The clasts were predominantly composed of ooliths, but mollusc shell and echinoderm fragments and quartz were also present. The matrix was composed of sparitic syntaxial carbonate and some micritic carbonate. There was a moderate to high abundance of open voidage space. There was possibly some evidence of sedimentary bedding by the preferred alignment of elongate clasts.
Strength
Compression - BS EN 1926
Average: 37.70 Mpa from 45 tests
Flexural Strength - BS EN 13161
Average: 5.23 Mpa from 40 tests
Breaking Load at Dowel Hole - BS EN 13364
Average: 5,098 N from 20 tests
Durability
Water Absorption - BS EN 13755
Average: 7.36% from 120 tests
Density - BS EN 1936
Average: 2,082 kg/m³ from 135 tests
Porosity - BS EN 1936
Average: 22.33% from 325 tests
Saturation Coefficient - BS EN 1936
Average: 0.65 from 246 tests
Salt Crystallisation - BS EN 12370
Average: 5.83% from 36 tests
Flooring / Paving
Flooring / Paving - EN14157
Average: 22.14 from 9 tests
Slip Resistance - TRRL Pendulum Test: Grit 60 Filled (External Paving)
Wet Average 83 from 23 tests
Internal Flooring
Bowers Whitbed is suitable for all flooring applications up to intensive use such as shopping centres and airports with estimated visitor numbers of 500,000,000 with a service life without significant wear of 20 years. The slip resistance results of over 40 demonstrate that the stone will be safe in all applications.