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Appendix 3 – The UKCSA Specification
• Cast stone units:
– Manufacturer: Member of the United Kingdom Cast Stone Association
(UKCSA).
(See www.ukcsa.co.uk/membership.php for a list of current members)
– Manufacturing process: In accordance with the UKCSA Operating Standard
– Method of manufacture: Wet cast *
Semi-dry cast *
Fibre reinforced cast stone *
(* include the method of manufacture required as appropriate)
– Product references: To approved details
– Absorption: To BS 1217: 2008, CAT method
– Compressive strength: To BS 1217: 2008
Cube strength testing to be carried out on a minimum of a weekly basis
Cubes cured in accordance with BS EN 12390-2
Cubes crushed in accordance with BS EN 12390-3
– Average cube strength: Minimum 35 MPa (35 N/mm2)
Single cube strength: Minimum 28 MPa (28 N/mm2)
– Finish: To approved sample
– Colour: To approved sample
• Mortar: To BS 5628-3: 2005
• Joints: Flush pointed
– Width: 6 mm **
10 mm **
(** include the joint width required as appropriate)
• Other Requirements: None
