1024 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
Different life cycle stages have different impacts on the
total environmental burdens associated with the produc-
tion of aggregates. Similarly, different input flows impact
the total environmental burdens of the different product
groups. Table 3 and Table 4 summarises the key contribu-
tion to the five main impact categories for the different
product groups for both mobile and stationary process
operation.
Benchmark
In total there are 50 active EPD for aggregates according to
Environdec database. Each EPD contains multiple product
groups. In all, there are 280 defined product groups within
these 50 EPDs. Figure 5 illustrates the distribution of the
environmental impact from different aggregates based
on the level of calculated CO2 emissions. Larger product
groups 0/200 or 0/300 tend to have lower impact while
finer fraction are found in the midrange of the spectrum.
On the higher end of the spectrum there are products from
Marine aggregates as well as finer aggregates with additives
to specific applications.
DISCUSSIONS
There is a difference between the results between the mobile
and stationary processing plants. The most significant dif-
ference is due to the use of fossil fuel to power the genera-
tors that supply the mobile units with electricity. In both
cases, the GWP for the first product group is between 2.5
Table 3. Contribution analysis for the mobile crushing
Product Group Impact Category Highest Impact Resource %of Total Impact
Group 1 GWP-total Diesel 74.2
Group 1 ODP Mixed waste 90.7
Group 1 AP Chemicals 92.5
Group 1 EP-freshwater (P) Diesel 63.3
Group 1 POCP Diesel 64.3
Group 2 GWP-total Diesel 75.4
Group 2 ODP Mixed waste 90.3
Group 2 AP Chemicals 92.5
Group 2 EP-freshwater (P) Diesel 64.8
Group 2 POCP Diesel 65.7
Group 3 GWP-total Diesel 78.9
Group 3 ODP Mixed waste 88.8
Group 3 AP Chemicals 92.5
Group 3 EP-freshwater (P) Diesel 69.2
Group 3 POCP Diesel 70.1
Table 4. Contribution analysis for the stationary crushing
Product Group Impact Category Highest Impact Resource %of Total Impact
Group 1 GWP-total Diesel 72.0
Group 1 ODP Mixed waste 90.7
Group 1 AP Chemicals 92.5
Group 1 EP-freshwater (P) Diesel 62.0
Group 1 POCP Diesel 63.4
Group 2 GWP-total Diesel 66.8
Group 2 ODP Mixed waste 90.0
Group 2 AP Chemicals 92.5
Group 2 EP-freshwater (P) Diesel 59.3
Group 2 POCP Diesel 61.8
Group 3 GWP-total Diesel 65.7
Group 3 ODP Mixed waste 89.9
Group 3 AP Chemicals 92.5
Group 3 EP-freshwater (P) Diesel 58.7
Group 3 POCP Diesel 61.5
Different life cycle stages have different impacts on the
total environmental burdens associated with the produc-
tion of aggregates. Similarly, different input flows impact
the total environmental burdens of the different product
groups. Table 3 and Table 4 summarises the key contribu-
tion to the five main impact categories for the different
product groups for both mobile and stationary process
operation.
Benchmark
In total there are 50 active EPD for aggregates according to
Environdec database. Each EPD contains multiple product
groups. In all, there are 280 defined product groups within
these 50 EPDs. Figure 5 illustrates the distribution of the
environmental impact from different aggregates based
on the level of calculated CO2 emissions. Larger product
groups 0/200 or 0/300 tend to have lower impact while
finer fraction are found in the midrange of the spectrum.
On the higher end of the spectrum there are products from
Marine aggregates as well as finer aggregates with additives
to specific applications.
DISCUSSIONS
There is a difference between the results between the mobile
and stationary processing plants. The most significant dif-
ference is due to the use of fossil fuel to power the genera-
tors that supply the mobile units with electricity. In both
cases, the GWP for the first product group is between 2.5
Table 3. Contribution analysis for the mobile crushing
Product Group Impact Category Highest Impact Resource %of Total Impact
Group 1 GWP-total Diesel 74.2
Group 1 ODP Mixed waste 90.7
Group 1 AP Chemicals 92.5
Group 1 EP-freshwater (P) Diesel 63.3
Group 1 POCP Diesel 64.3
Group 2 GWP-total Diesel 75.4
Group 2 ODP Mixed waste 90.3
Group 2 AP Chemicals 92.5
Group 2 EP-freshwater (P) Diesel 64.8
Group 2 POCP Diesel 65.7
Group 3 GWP-total Diesel 78.9
Group 3 ODP Mixed waste 88.8
Group 3 AP Chemicals 92.5
Group 3 EP-freshwater (P) Diesel 69.2
Group 3 POCP Diesel 70.1
Table 4. Contribution analysis for the stationary crushing
Product Group Impact Category Highest Impact Resource %of Total Impact
Group 1 GWP-total Diesel 72.0
Group 1 ODP Mixed waste 90.7
Group 1 AP Chemicals 92.5
Group 1 EP-freshwater (P) Diesel 62.0
Group 1 POCP Diesel 63.4
Group 2 GWP-total Diesel 66.8
Group 2 ODP Mixed waste 90.0
Group 2 AP Chemicals 92.5
Group 2 EP-freshwater (P) Diesel 59.3
Group 2 POCP Diesel 61.8
Group 3 GWP-total Diesel 65.7
Group 3 ODP Mixed waste 89.9
Group 3 AP Chemicals 92.5
Group 3 EP-freshwater (P) Diesel 58.7
Group 3 POCP Diesel 61.5