Facts and figures’ over de
33
‘Facts and figures’ over de klimaatvoordelen van betonwegen Luc Rens Raadgevend ingenieur infrastructuur, FEBELCEM Managing Director, EUPAVE BBG – Studiedag “Beton, klimaat, circulaire economie: uitdagingen, ontwikkelingen en impacts” – Affligem – 9 juni 2021
Transcript of Facts and figures’ over de
‘Facts and figures’ over de klimaatvoordelen van betonwegen
Luc Rens
Raadgevend ingenieur infrastructuur, FEBELCEM
Managing Director, EUPAVE
BBG – Studiedag “Beton, klimaat, circulaire economie: uitdagingen, ontwikkelingen en impacts” – Affligem – 9 juni 2021
Who is EUPAVE
Created at the end of 2007, the European Concrete Paving Association has for mission to…
• Advocate and enable wider use of cement and concrete applications in European transport infrastructure by o engaging with EU, national and local
decision makers, o disseminating technical know-how and
communicating benefits and o promoting innovation and best
practices in the sector.
2
Our (19)Members & (13)Partners are:
• National and international cement and/or concrete associations
• International cement companies
• Associations of contractors
• Equipment manufacturers
• Material manufacturers
• Research institutes
• Contractors
• Designers
3
Our activity areas
• Roads (motorways-secondary-local)• Concrete Safety Barriers• Industrial and Port Areas• Airfields• Tunnel pavement• Dedicated Bus and Tram Lanes• Roundabouts• Concrete Rail Slab Track• Soil Stabilisation and Pavement
Recycling• …
4
In EUPAVE’s bylaws, since 2007
5
In 2009, more than 10 years ago...
6
Ook in FEBELCEM versie!
7
Continued in 2011
8
As times goes by...
9
1980 2000 2020
Quality
Durability
Sustainability
Climate neutralCircular
Carbon neutral
Smart & LeanBIM
IoT/VR/ARInnovation
...till 2019
• Environmental aspects of concrete pavements are put back high on the agenda
o Creation of EUPAVE’s WG on Environmental Strategy▪ Kick-off meeting on 6 March 2019 “Setting the priorities”
▪ 38 meetings so far!
▪ Elaborate messages + Communication
o Infographic▪ Indicating the main environmental benefits of concrete pavements
o Fact Sheets▪ Give more detailed information on the different benefits
10
Environmental benefits of concrete roads
11
Fact Sheets
12
Fact Sheet “High Albedo”
• Albedo = o ability of a surface to reflect light rays (= energy)o Reflected light/Incident lighto 0.30 on average for earth
• 4 x beneficial!!!!
13
Fact Sheet “High Albedo”
1. Slowing down global warming
o More reflection = increase of outgoing radiation at the top-of-atmosphere
o Potential to alter earth’s energy and consequently climate change effects
o Greenhouse gases and surface albedo are both forcing agents and can be expressed as a capture or release of CO2
14
Fact Sheet “High Albedo”
1. Slowing down global warmingo Changing asphalt (black) into concrete (white) =
Δ albedo of + 0,15
o Scientific studies: Δ albedo of + 0,01 = - 1.5 kg CO2/m²
o Asphalt to Concrete = 15 x 1.5 = - 22.5 kg CO2/m² expressed as 50 years GWP
15
o 1m² of highway, 25 cm thick, 350 kg/m³ CEM I at 803 kg CO2/tonne cement:
▪ 803 x 0.350 x 0.25 = 70.26 kg CO2/m²
o 22.5/70.26 = 32% compensation for GWP of cement production
o In some cases (secondary roads, 20 cm thick, CEM III): up to 60%
Fact Sheet “High Albedo”
2. Reducing the Urban Heat Island Effect
o Higher temperature in urban environments
o Increased energy demand due to air conditioning
o Higher risk on smog and air pollution
16
Fact Sheet “High Albedo”
2. Reducing the Urban Heat Island Effect
o “COOL PAVEMENTS” - Strategy▪ Light reflecting and/or evaporative
pavements (pervious & vegetated)
▪ Average decrease of 0.4°C
▪ Supported by
– EC, DG Environment
– US Environmental Protection Agency
▪ Combined with aesthetic requirements
17
Fact Sheet “High Albedo”
3. Saving cost and energy for road lightingo Fewer lighting columns
o Lamps of lower luminance
o Savings around 30 – 35%
o Particular case of tunnels
4. Offering a better visibilityo Enhanced visibility in difficult circumstances
(heavy rain, dense fog)
o Traffic safety
18
Fact Sheet “High Albedo”
1. Slowing down global warmingo Changing asphalt (black) into concrete (white) =
Δ albedo of + 0,15
o Scientific studies: Δ albedo of + 0,01 = - 1.5 kg CO2/m²
o Asphalt to Concrete = 15 x 1.5 = - 22.5 kg CO2/m² expressed as 50 years GWP
19
o 1m² of highway, 25 cm thick, 350 kg/m³ CEM I at 803 kg CO2/tonne cement:
▪ 803 x 0.350 x 0.25 = 70.26 kg CO2/m²
o 22.5/70.26 = 32% compensation for GWP of cement production
o In some cases (secondary roads, 20 cm thick, CEM III): up to 60%
-22,5 kg CO2/m²
30 to 60% compensation of CO2 for cement production
Fact Sheet “Less Fuel Consumption”
• Not only electrical vehicles but also physical road infrastructure can contribute to the reduction of CO2-emissions by road transport !!
• Influencing factors:
20
Fact Sheet “Less Fuel Consumption”
• Evenness & Texture: depend on quality of construction and/or safety requirements, both for concrete and asphalt roads
• Deflection depends on stiffness of the pavement
21
Fact Sheet “Less Fuel Consumption”
• Field studies comparing concrete to asphalt
o Canada, National Research Council
▪ Series of 4 investigations
▪ Different seasons, different statistical models
▪ Roads of equal roughness (unevenness)
▪ Results from - 0.8 to -3.9 % with a reliability of 95% (average – 2.35%)
o Sweden, VTI
▪ Passenger car: - 1.1% (mainly texture)
▪ Truck, 60 tonnes, 80 km/h: -6.7% (texture + deflection)
o Florida, International University
▪ Passenger car: - 2.25% (mainly texture)
▪ Medium duty truck, 89 km/h: -3.3% (texture + deflection)
22
Fact Sheet “Less Fuel Consumption”
• Theoretical study by MIT
o Pavement Vehicle Interaction (PVI)
o Desktop Experiment
23
Fact Sheet “Less Fuel Consumption”
24
0,0
0,5
1,0
1,5
2,0
2,5
3,0
0,000001 0,00001 0,0001 0,001 0,01 0,1
PD
F/1
Excess Fuel Consumption (liter/km)
AC
PCC
3-axle Semi-trailer truckPassenger Car
Asphalt
Concrete
Fact Sheet “Less Fuel Consumption”
• Theoretical study by MIT
o Results depending on speed and temperature
o - 0.8233 / 35 = -2.35 %
25
Fact Sheet “Less Fuel Consumption”
• What means a saving of 0,8233 litres/100 km for the European motorway network?
o On average: ▪ 80 000 km of motorways
▪ Annual freight transport of 1804 billion tonnes-kilometres
▪ Payload of 16 tonnes
▪ 2 lanes + hard shoulder = 10 m / carriageway
o Changing from asphalt to concrete, the difference in GWP over 50 years▪ - 78 kg CO2/m² of pavement
▪ Total potential of annual saving = 2.5 million tonnes of CO2
26
Fact Sheet “Less Fuel Consumption”
• Field studies comparing concrete to asphalt
o Canada, National Research Council
▪ Series of 4 investigations
▪ Different seasons, different statistical models
▪ Roads of equal roughness (unevenness)
▪ Results from - 0.8 to -3.9 % with a reliability of 95% (average – 2.35%)
o Sweden, VTI
▪ Passenger car: - 1.1% (mainly texture)
▪ Truck, 60 tonnes, 80 km/h: -6.7% (texture + deflection)
o Florida, International University
▪ Passenger car: - 2.25% (mainly texture)
▪ Medium duty truck, 89 km/h: -3.3% (texture + deflection)
27
- 2,35% fuel consumption
Which of the 5 C’s?
• Where are “Albedo” and “Fuel consumption” situated in the 5C-approach?
o Clinker
o Cement
o Concrete
o Construction
o Carbonation
28
Impact of the pavement (construction) thanks to characteristics (colour – stiffness) of the material (concrete)
The best is yet to come...
• New Fact Sheets on environmental topics
o 100 % Recycling
o Resilient
o ≥ 40 Years Service Life
o Minimum Maintenance
o Sustainable Water Management
o ...
29
And the economic and societal benefits...
• LCCA
• Healthty competition
• Price stability
• Local economies
30
Closing remarks
EUPAVE and FEBELCEM are ready and will continue to
• Communicate on the benefits of concrete pavements
• Promote the use of LCCA – LCA
o Providing input parameters
o Comparing alternative solutions
• Assist you in developing technical solutions, e.g pavement design
• Share know-how and experience,
o Information sessions
o Publications
o …
31
En tot slot
• Uiteraard heeft ook FEBELCEM deze fact sheets beschikbaar in NL en FR
• En u vindt alvast een exemplaar in uwdocumentatiemapje
32
Thank you for yourkind attention
