CO2 Emissions -
The indicator for production
CO2 is carbon intensity or CO2/tonne of
concrete produced. Data from the energy use of concrete production
and a proportional contribution from constituent materials are
converted to carbon emissions using factors published by DEFRA with
an adjustment for the process carbon emissions from cement. The
resulting value of the indicator is influenced by both
CO2 emissions from production and changes in the
average proportions of concrete represented by the data collected.
These proportions, termed the "Rolling mix" are directly
affected by the relative market demand for different types of
CO2 emissions - Production
(Rolling mix) (kg
In 2015 the
Rolling Mix value was 80.3 kg/tonne for concrete
(21.7% reduction from 1990 baseline) and 90.1 kg
CO2/tonne for concrete + reinforcement.
emissions - Production (Standardised mix) (kg
Standardised or Baseline mix is
based on the average proportions of materials in
concrete when the strategy was launched in 2008. By using
these fixed mix proportions with each year’s carbon
values, the industry reports the overral carbon intensity and
shows the performance direectly under its control. In
2015 the standardised mix value was 73.8 kg
CO2/tonne for concrete (28% reduction from 1990
baseline) and 84.0 kg CO2/tonne for concrete +
The 2020 target is to reduce CO2 emissions by 30%
from the 1990 baseline equivalent to a value of 72.2 kg
CO2/tonne of concrete produced.
CO2 Emissions - Transport
CO2 emissions of the total delivery transport
through the industry supply chain (kg
Within the concrete supply chain,
some elements of transport are relatively simple to measure; others
are more complex potentially involving multiple modes of delivery,
sub-contracted vehicles scheduling return loads to make efficient
use of vehicles.
This indicator of kg
CO2/tonne is calculated from the conversion of concrete
data and proportioned materials delivery (to a construction site)
data using DEFRA carbon factors. The value for 2015 was 8.4 kg
In 2015 the average delivery
distance for all concrete was 46 km (or 28.8 miles). The average
delivery distance for all raw materials for concrete was 72 km.
Many quarries have on-site rail terminals enabling
direct access to the rail network.
Further information on the
CO2 emissions indicator can be found in
Find out about the joint commitment
between MPA and the Rail Freight Group
These indicators are part of the
Carbon section of the report and 2020 Strategy Commitments.
An update on our Carbon
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