An independent study demonstrated that the use Gabions in retaining walls and Reno Mattresses in river revetments, offers a reduced carbon footprint in comparison with the construction of traditional rip-rap revetments and concrete wall solutions. Maccaferri offers high-quality solutions which maximise the opportunity to reuse materials available on-site. This saves on the export and import of materials from the site, reducing polluting truck movements, quarrying and disposal of waste materials in landfills.

1. Date: October 2017
ROCKFALL PROTECTION
& NATURAL HAARD MITIGATION
Environmental Benefits of
Double Twist Solutions

2. Today, there is a
global evident risk
posed by climate
change.
The response is a call
for action to reduce
carbon emissions.

3. The production, transportation and installation of
the most common civil engineering materials
rely on the use of carbon energy.

4. The amount of
carbon dioxide
released into the
atmosphere as
result of these
activities is called
carbon footprint.

5. Maccaferri “DT” wire
mesh Solutions
Concrete Structures
Rip-rap
Our solutions:An independent comparison has been conducted
on the carbon footprint of:

6. The analysis considered the entire
production and construction cycle.
Production of the base materials
(“DT” (Double Twist) wire products,
stones or concrete)
Transportation
to the job site
Installation
activities
1
23

7. A comparison has been made between different
products for two specific applications:
- Hydraulic Works - Bank Protection
- Retaining Structures

8. Solutions for Bank Protection
Reno Mattress vs Rip-Rap

9. Reno Mattresses
are rectangular
units made of
polymer coated
steel wire mesh
and are filled with
stones at the
project site.

10. Bank Protection: Reno Mattress vs Rip-Rap
0
20000
40000
60000
80000
100000
120000
140000
160000
180000
Traditional Reno Mattresses with stones from quarry Reno Mattresses with local river bank
stones
34x
18x
5.8x
Maccaferri Reno Mattresses
(Stones from remote quarry)
Maccaferri Reno Mattresses
(Stones from quarry <100km)
Rip-Rap
Transport (KgCO2eq)
Material Input (KgCO2eq)
= Annual CO2 emissions of a passenger vehicle
Emissions of CO2 (KgCO2eq)
for the construction of 5400 m2 of river bank protection

11. Retaining Structures
Gabion Wall vs Concrete Wall

12. Gabions are steel
wire mesh box
containers filled
with stone at the
project site.

13. Retaining Structures: Gabion vs Concrete Wall
0
10000
20000
30000
40000
50000
60000
Traditional Reno Mattresses with stones from quarry Reno Mattresses with local river bank
stones
Maccaferri gabions
(Stones from remote quarry)
Maccaferri gabions
(Stones from quarry <100km)
Concrete wall
Transport (KgCO2eq)
Material Input (KgCO2eq)
= Annual CO2 emissions of a passenger vehicle
1x
1.6x
11x
Emissions of CO2 (KgCO2eq)
for the construction of a 8-m high and 10-m long retaining wall

14. The use of Reno
Mattresses and
Gabions filled with
locally available
stones, leads to
savings of CO2
emissions of up to
90%.

15. Gabions and Reno
Mattresses also
offer a good
substrate for the
vegetation.

16. Ongoing research
shows the absorption
rate of CO2
sequestered by the
vegetation growing on
Maccaferri wire mesh
solutions is similar to
that found in natural
plant formations.

17. The Life Cycle
Assessment (LCA)
extends this concept:
• Cradle to grave
• Build
• Maintenance
• Longer design life
• Performance in use
• Recycling / reuse

18. Factories with PV
contribution
Global manufacturing
footprint – less transport
distance
Re-use of site-won
materials & vegetation
establishment
1. Our solutions:
How Maccaferri reduces CO2:

19. Thank You.
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All dimensions and specifications subject to change without notice.
Please consult your local Maccaferri website for the latest technical specifications.