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General comment The data selected for LCA originate from ITB LCI questionnaires completed by DYCKERHOFF Sp. z o.o. and verified during data audit No data collected is o lder than five years and no generic datasets used are older than ten years. The representativeness, completeness, reliability, and consistency is judged as good. The background data for the processes come from the following resources database Ecoinvent v.3 9.1 sand, gravel, water , flyash, admixes The data for CEM III is based on existing EPD . Specific (LCI) data quality analysis was a part of the input data verification. Where no background data was available, data gaps were complemented by manufacturer information and literature research.
The allocation rules used for this EPD are based on general ITB PCR A and EN 15804 +A2 . Each manufacturing plant was subjected to LCI data analysis. The values adopted for the calculations were averaged from 3 plants using a weighted average. Aloccation to products is mass based. The cement used is produced in Poland (specific and the weighted average mass of CEM III production from Table 1 was taken into account . Minimum 99.5% of impacts from the production were allocated to product covered by this declaration. Emissions allocated in cement production are assessed by ITB usin g EN 15804+A2 (specific EPDs). Calculations for GWP indicator are made considering gross emissions. The indicated gross value includes the CO 2 emissions from waste incineration (excluding biomass fraction of fuels).
99.0% materials and 100% energy consumption were inventoried in a factory and were included in calculation. In the assessment, all significant parameters fro m gathered production data are considered, i.e. all raw material used per formulation, utilized energy, and electric power consumption, direct production waste, and available emission measurements. The total of neglected input flows per module A1 A3 does n ot exceed the permitted maximum of 1 % of energy usage and product mass. Tires consumption for transport was not taken into account. The components with a percentage share of less than 0.1% were not included in the calculations. It is assumed that the tota l sum of omitted processes does not exceed 1% of all impact categories. In accordance with EN 15804 machines and facilities (capital goods) required for and during production are excluded, as is transportation of employees.
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