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General comment The values determined to calculate A1 (cement) and A3 originate from verified CEMEX LCI inventory data. A1 values (raw materials) were prepared considering specific EPDs, Ecoinvent data and economic allocation data processed for ashes.
The allocation rules used for this EPD are based on general ITB PCR A and EN 15804. As no co-products are produced, the flow of materials and energy and also the associated release of substances and energy into the environment are related exclusively to the concrete mix produced. Cement used is produced by Gdynia cement and the weighted average mass of CEM I 42.5 production was used for allocation. In the case of fly ash, ecoproduct from electricity production used as a cement constituent, economic allocation was applied. Minimum 99.5% of impacts from the production lines were allocated to product covered by this declaration. Emissions allocated in clinker production are assessed by CEMEX using international methods for ETS system declaration. The specific prices for fly ash declared by the producer were used for the economic allocation. Calculations for GWP indicator are made taking into account gross and net emissions. The indicated gross value includes the CO2 emissions from waste incineration (excluding biomass fraction of fuels), net-value excludes impacts from alternative waste-based fuels.
In this assessment, all information gathered from data collection for the production of concrete has been modelled, i.e. all raw materials used, the electrical energy and other fuels used, use of ancillary materials and all direct production waste. Transport data on input was considered. No cut-offs have been made in accordance with EN 15804. The machines and facilities (capital goods) required for and during production are excluded, as is transportation of employees. Calculations for GWP indicator are made taking into account gross and net emissions.
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