|
General comment Allocation is required if some material, energy, and waste data cannot be measured separately for the
product under investigation.
In this study, as per EN 15804, allocation is conducted in the following order;
1. Allocation should be avoided.
2. Allocation should be based on physical properties (e.g. mass, volume) when the difference in revenue
is small.
3. Allocation should be based on economic values.
The allocations in the Ecoinvent 3.10 datasets used in this study follow the Ecoinvent system model
‘Allocation, cut-off, EN15804’.
Scenarios included in the LCA are based on realistic scenarios which are currently in use and are
representative for one of the most likely scenario alternatives.
Asphalt mixtures are categorized into five groups. The grouped products are with identical or similar
functions, manufactured by a single company at several manufacturing sites, with the same major steps in
the A3/core processes. For each group, best- and worst-case scenarios were evaluated, to see if A1-A3 GWP
value differs more than 10 %.
Group 1 and Group 4 EPDs are based on worst-case scenario product, since A1-A3 GWP value differs more
than 10%. For each indicator and module A-C, the highest result of the included products is declared, and for
module D, the lowest benefit of avoided processes and the highest load of included processes is declared.
Given that GWP value of modules A1-A3 differs less than 10 % for Groups 2 and 5, the calculations are based
on the average result.
Group 3 is an EPD of a single product from a manufacturer/service provide
The study does not exclude any modules or processes which are stated mandatory in the Standards and PCR.
The study does not exclude any hazardous materials or substances. The study includes all major raw material
and energy consumption. The cut-off criteria were applied in the study due to the minimal contribution of
the technological additive input, which accounted for only 0.005-0.3% of the total mass of the declared unit.
Furthermore, datapoints for these technological additives were scarce and challenging to locate, making it
difficult to gather comprehensive and accurate data for their inclusion in the analysis. The total excluded
input and output flows do not exceed 5% of energy usage or mass.
|
