Mine gneiss Pomianow – attestations

Aggregates and grits gneiss meet the requirements of the following standards:

• BS EN 13043:2004 “Aggregates for bituminous mixtures and surface treatments used for roads, airfields and other trafficked areas”,
• BS EN 13242 + A1: 2010 “Aggregates for unbound and hydraulically bound materials for use in building and road construction”,
• BS EN 13381-1/AC: 2004 “Armourstone. Requirements “
• BS EN 12620 + A1: 2010 “Aggregates for concrete”
• BS EN 13450: 2004 “Aggregates for railway ballast”
• PN / S 02205:1998 “Earthworks. Requirements and test methods “

Properties of aggregates and grits gneissic:

• Excellent strength parameters
• high capacity factor (CBR over 120%),
• low bulk density mixtures (for a mixture of 0-31,5 mm in an uncompressed state is 1.45 Mg/m3) and is approximately 15% lower than the mix of basalt,
• total hardiness and full thermal shock resistance
• low water absorption due to the absence of microcracks resulting from the passage of water in the cracks and its freezing point,
• roughness or safety in the use of surface-resistance to polishing PSV above 50
• very good cubicity – irregular grains max 12%
• Low abrasion
• Very good adhesion to bitumen.

Declarations of Performance

• DoP gneiss sand 0 – 4 mm 12620 2010
• DoP gneiss sand 0 – 4 mm 13043 2004
• DoP gneiss key aggregate 4 – 31,5 mm 13242 2010

Below certificates and attestations aggregates gneissic:

• Railway Institute Certificate No. CZ IK – 16/2015 according to PN-EN 13450,
• Certificate of Factory Production Control 1454-CPD-274-1, according to PN-EN 12620 + A1: 2010, 13043:2004, 13242 + A1: 2010, 13383-1:2003, 13450:2004 for aggregates and grits,