A more focused low-carbon strategy2021 Activity
CO EMISSIONS BY TYPE OF CONCRETE In kg CO eq/m³ of concrete, excluding steel
INNOVATIVE CONCRETES TO PROTECT THE ENVIRONMENT
Approximately
90% OF THE CONCRETE USED TO BUILD THE
INFRASTRUCTURE
IS LOW-CARBON
CONCRETE
Traditional CEM I Internal structures
Approximately 55% less steel per m³
of concrete
compared with a
reinforced concrete
segment
Between 800 and 1,000 t CO eq saved
per kilometre of
tunnel due to
reduced steel use
Low-carbon CEM III A Moulded walls
Low-carbon CEM III B Voussoirs
Low-carbon concrete Voussoirs90
264
140
118
Ultra-low carbon voussoir
installation tested on Line 18
Use of fibre-reinforced concrete
voussoirs on Line 16
(1) Excluding the extension of Line 14 to the south (programme management delegated to RATP)
2021 CARBON FOOTPRINT OF GRAND PARIS EXPRESS WORKSITES(1) In t CO eq Main sources of CO emissions
CEM I concrete
11,828
CEM II concrete
7,888
Electricity
6,166
Fuel for worksite machinery
33,655
CEM III concrete (low-carbon)
118,209
Steel
172,078
Spoil transport
50,537
2021 total greenhouse gas emissions from
Grand Paris Express worksites: 416,648 t CO eq