Stone Testing - UKAS Accredited

Sandberg offer UKAS accredited stone testing for a comprehensive range of British (BS EN), European (DIN), American (ASTM) and documented in-house stone testing methods.

Stone testing accreditation is held for 59 no. stone testing methods and procedures which cover the following physical and mechanical parameters.

• Petrographic description
• Petrographic examination

• Porosity (open and total)
• Microporosity
• Saturation coefficient
• Density (apparent and real)
• Water absorption at atmospheric pressure
• Water absorption coefficient by capillarity

• Compressive strength
• Modulus of rupture (3-point)
• Flexural strength (4-point)

• Frost resistance
• Sound speed propagation
• Salt crystallisation
• Acid immersion (sandstone)
• Thermal shock resistance

• Abrasion resistance (wide wheel)
• Abrasion resistance (lapping plate)
• Slip resistance (pendulum)

• Breaking load at dowel hole
• Microcrack dye testing

Slate

• Petrographic examination
• Dimensions
• Water absorption
• Carbonate content
• Wetting & drying
• Acid immersion
• Bending strength
• Thermal cycling
• Freeze/thaw resistance
• Sulphur dioxide exposure

The selection of material for stone testing is critical, as it must be representative of the material to be produced and supplied. Sandberg can offer independent expert advice and sampling services for stone testing to ensure that representative and traceable samples are obtained.

On completion of stone testing, Sandberg is able to provide an independent expert opinion on the results.