Verified by manufacturer 3 months ago
ISO 14001 Environmental Management Systems
ISO 45001 Health and Safety Management
ISO 9001 Quality Management
Portland stone for external paving.
Suitable for external paving applications.
Portland Stone is extracted from one of the largest mines on Portland, and although there is no colour variation in the basic matrix of the stone, the shell content and texture of each bed will reflect the light differently, creating the eight variations of the stone.
Contains large grey shell fragments that include Turreted Gastropods (Portland screws), as well as large clam shells. It has a large number of holes scattered throughout due to the removal of fossil shells by percolating rain.
Predominantly grey shells with some large white shell fragments, mainly large thin clams up to 100 mm long laid parallel to the bedding. Some banding is evident in larger slabs.
Fancy Beach Whitbed:
A moderately high shell content, which are predominantly grey. There are small voids throughout the slab and the texture varies.
A medium shell content, mainly large, thin clams up to 80 mm long laid parallel to the bedding. The stone mellows over time to grey/ white due to grey and white fragments.
Ostrea Patch Reef Whitbed:
The shells are randomly distributed throughout the stone, including many large grey and white oyster shell fragments. It is typically coarse with some vuggy patches.
The stone has a low to medium shell content that are predominantly grey with some white fragments that are randomly distributed across the stone. Banding is evident, particularly in larger slabs.
Features and benefits:
Creamy/ white is typical Portland colour with grey shell included.
Q25/50 Natural stone slabs
Q25/115 Natural stone slab paving overlay system
Q25/110 Natural stone slab paving system
Q25/26 Natural stone slab paving system
M40/10 Natural stone covering to
M40/115 Natural stone covering to
Open textured oolitic limestone formed from ooliths in a micrite matrix.
Creamy/ white is typical Portland colour. The content of grey shell can vary the overall colour depending on the density of included shell.
Bowers Quarry, Isle of Portland, UK.
TRRL pendulum test: grit 120 (flooring). Average values.
PTV 82.85 (wet); 78.75 (dry).
Breaking load at dowel hole (at 75 mm thick). Average value.
To BS EN 13364, 4032 N.
Lowest expected value 3492 N, highest expected value 5949 N.
Water absorption (maximum)
To BS EN 13755, 6.02%.
Lowest expected value 3.40%, highest expected value 8.40%.
To BS EN 1962, 43.02 MPa.
Lowest expected value 30.0 MPa, highest expected value 90.5 MPa.
To BS EN 13161, 4.07 MPa.
Lowest expected value 4.67 MPa, highest expected value 12.50 MPa.
To BS EN 1936, 2191 kg/m³.
Lowest expected value 2123 kg/m³, highest expected value 2331 kg/m³.
To BS EN 1936, 17.58%.
Lowest expected value 12.70%, highest expected value 18.40%.
To BS EN 12370, 2.88%.
Lowest expected value 0.67, highest expected value 0.85.
To EN 14157, 22.93.
Lowest expected value 20.20, highest expected value 25.93.
Light reflectance tested using NCL Colour Scan instrument - Grit 60.
57.00 (mean value).
Value from Grove Whitbed test, however these stones are very similar.
TDS - Jordans Whitbed
TDS - Jordans Roach
TDS - Jordans Basebed
TDS - Grove Whitbed
TDS - Fancy Beach Whitbed
TDS - Bowers Roach
TDS - Bowers Basebed
TDS - Bowers Whitbed
CE - External Paving - Bowers Roach
CE - External Paving - Bowers Whitbed
CE - External Paving - Fancy Beach Whitbed
CE - External Paving - Grove Whitbed
CE - External Paving - Jordans Roach
CE - External Paving - Jordans Whitbed