EUROPEAN DEVELOPMENT OF THE TEMPERA/EVOTHERM
DAT PROCESS
What are the WMA interests?
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Reduction of stack emissions at the plant
Reduction of exposure to fumes
Energy (Fuel) Savings
Traffic returns to normal quicker
Less odor
Expanded work period
Higher RAP incorporation
Longer binder life
….
Eurovia Range
• Historic :
– 2003 : Development of the warm mix asphalt with Asphamin ® process :
• Introduction of zeolithe during the manufacturing of the mix
• Reduction by 30 °C of the mixing temperature
– 2006 : Evaluation of the Evotherm processes with
Meadwestvaco
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Evotherm ET
Evotherm DAT
Evotherm 3 G (Evotherm MA 3)
What is the Evotherm DAT process ?
• The Evotherm DAT (Dispersed Asphalt Technology) is a
warm mix asphalt process to reduce the manufacturing
temperature by 40 to 60°C
• Addition of a soap (a chemical additive + water) in the
bitumen line
– Water : Creation of an inverse emulsion (water in bitumen) to
improve workability of the binder at lower temperatures
– Additive (10 to 20 %): modification of the interfacial tension and
adhesion
• EVOTHERM DAT5 (H5)
European experience
• Different plants : continuous and by batch
• Plant modifications :
– For the production of the soap: dilution of the Evotherm DAT 5 in
water
⇒Metering pump for the required amount of soap in the binder
– To regulate the burners correctly to the required manufacturing
temperature (optimization of the fuel or gaz combustion)
– To regulate the fumes temperature (will depend on the plant
type)
Injection Evotherm DAT 5 in continuous plants
EXEMPLE TSM
Vanne
pilotée
Clapet
antiretour
EXEMPLE RETROFLUX
Vanne
pilotée
Clapet
antiretour
Injection Evotherm DAT 5 in batch plants
BAC PESEUR A VIDANGE GRAVITAIRE
Clapet
antiretour
Vanne
pilotée
Vanne
pilotée
Clapet
antiretour
BAC PESEUR A VIDANGE PAR POMPE
PRODUCTION OF AN EME 0/14 class II
• Region of Montpellier (France, 34)
• Limestone aggregates 0/14 + 20 % RAP,4.6 % 20/30 and
0.28% solution of Evotherm DAT 5 (diluted at 12 %)
• Continuous plant
• Laboratory study :
– Comparison of the properties between :
HMA WMA
Manufacturing temperature (°C) 170 115
Moulded temperature (°C)
160 110
Laboratory results
Tests
GSC test
V100
Duriez test (NF EN 12697-12)
% Voids
CD (kPa)
Cw (kPa)
I/C (%) = 100 * Cw/CD
Rutting test (NF EN 12697-22)
% at 30 000 cycles
Void content (%)
Modulus (NF EN 12697-26)
Void content (%)
E à 15 °C, 10 Hz (MPa)
HMA
EME 0/14
Evotehrm DAT
Specifications (NF EN 13108-1)
2,5
2,7
<6
5,3
15 900
13 200
83
5,4
15 500
11 600
75
> 70
2,3
4
2,1
4
< 7,5
3 to 6 %
3,4
17 100
3,5
16 700
> 14 000
Jobsite results
Manufacturing flow rate (t/h)
Burner (%)
Manufacturing temperature (°C)
Fume temperature/ Filter (°C)
Mix quantity (t)
Fuel consumption (t)
Fuel save (t)
HMA
195
71%
175 to 180 °C
152 °C
204
6,45
-
WMA
180
46%
115 to 120 °C
107 °C
465
4,2
-35%
Jobsite results
EME- HMA
EME- Evotherm DAT
Specifications
NF EN 13108-1
NF EN 12697-7
% void content
4,2%
4,7 %
NF EN 12697-26
E*15°C – 10 Hz
15 456 MPa
14 930 Mpa
<6%
> 14 000 MPa
Environmental measurements
Dry gaz flow rate
Carbon dioxide
3
Nm /h
% on dry gaz
kg/h
Nitrogen dioxide
ppm
kg/h
Carbon monooxide
ppm
kg/h
SOx
Nm / dry gaz
kg/h
3
HMA
24 944
8,2
Evotherm DAT
25 583
6,2
157
8,04
1330
41,47
197
4,91
-
-22,5%
126,8
6,67
-17,0%
780,4
24,94
-39,9%
89,9
2,3
-53,2%
Conclusion (I)
• In 2009,
– 150 000 t were laid down in Europe (Evotherm DAT
– 1 500 000 t throughout the world (50% Evotherm DAT
® and 50 % Evotherm 3G)
• Wide range of mixes :
– Polymer bitumen
– Hard bitumen
– RAP (up to 50 %)
• Jobsite experience :
– Great flexibility
– Adjustement in our working methods for the manual work
Conclusion (II)
• Laboratory development continues :
– Correlation between laboratory manufacturing and the plants
– Oxydation phenomena on the binder
– Adhesion test : optimisation of the additive content versus the
aggregate nature
• Future …
– Environmental pressure (reduction of the fuel consumption, gaz
emissions…) will allow a development
– The additional cost is holding back the development.Yet, the
evolution of the fuel price will reduce this difference (fuel price in
France : 1/1/2009 = 235 €/t, 1/4/2010 = 420 €/t )
– Companies have to demonstrate the quality of the WMA
Acknowledgements
• Meadwestvaco : N. Picard,C. Giorgi, A.
Cannoot and J. Verriest
• Colleagues from the researh centre : T.
Gianetti, S. Fer, R. Teixeira and S. Faucon
Dumont
THANK YOU FOR YOUR ATTENTION