Granite aggregates are produced from a naturally occurring igneous rock body by blasting, crushing and screening to produce different size aggregates from 225 mm gabion stone to 0-2 mm crushed rock fines. Bardon Hill quarry produces approximately 4 million tonnes of aggregates per year. These products are used in a variety of applications including asphalt, ready-mixed and precast concrete, coastal and river defence and road construction. Technical Information Property Value, Unit Resistance to Fragmentation (BS EN 1097-2:2010) / Los Angeles Coefficient 16 Oven Dried Particle Density (BS EN 1097-6:2013) 2.76 Mg/m³ Water Absorption (BS EN 1097-6:2013) 0.7 % Uniaxial Compressive Strength (BS EN 1926:2006) 120 MPa Main Product Contents Material/Chemical Input % Granite 100 EPD Number: 000206 Date of Issue:20 April 2018 Expiry Date 19 April 2023 BF1805-C Rev 0.0 Page 3 of 8 © BRE Global Ltd, 2017 Manufacturing Process The igneous rock mass is drilled and then explosives are used to release several thousands tonnes of rock at a time. This rock which ranges in size from 2.5 meters to 0.5 mm is loaded into a crusher to reduce larger pieces to 300 mm, this is transported by conveyor to a processing plant where crushing and screening takes place to produce various sized graded aggregates for sale. Approximately 25 % of Bardon Hill aggregates are delivered to customers by rail. Process flow diagram EPD Number: 000206 Date of Issue:20 April 2018 Expiry Date 19 April 2023 BF1805-C Rev 0.0 Page 4 of 8 © BRE Global Ltd, 2017 Life Cycle Assessment Calculation Rules Declared / Functional unit description 1 tonne of granite aggregate System boundary This is a cradle to gate EPD (i.e. processes covered in the extraction and processing in modules A1 to A3). Data sources, quality and allocation Specific primary data derived from Aggregate Industries Bardon Hill works have been modelled. In accordance with the requirements of EN 15804+A1, the most current available data has been used. T