1. DEVELOPMENT OF THE TREATMENT TECHNIQUES IN EUROPE
D.PUIATTI Lhoist Group, France

2. Synopsis
Soil Treatment
Pavement Recycling
Materials Recycling

3. European Status of Soil Treatment
About 600 in situ treatment units
Roads, Motorways, Railways, Airports, harbors…
Housing, Commercial & Industrial Platforms.
Nb of Units

4. European situation as of today
Continuous development in different fields of application
From private to public investments
Different processes according to countries and applications
Mostly in place treatment, some in plant treatment (capping)
Mostly pulverized binders, beginning of slurry binders

5. Cement or Hydraulic Road Binder (HRB)
French Case
Earthmoving : 40 to 50 Mm³/year of soils
Hydraulically bond soils (3,5 to 6% of cement/HRB ~ 900kt/a): 6 to 8 Mm³/year
Lime treated soils (1,5 to 2 % of lime by weight ~ 400kt/a): 15 to 25 Mm³/year
Total treated soils : More than 1/3 of soils moved in France
Lime + Cement or HRB
(Double treatment)
Cement or Hydraulic Road Binder (HRB)
Lime

6. The French development process
American
Pulvimixers
Agriculture
Spreaders
French Mixers & Spreaders
Plough Mixers
Central plants
HRB
HighPerformance Mixers
Recycling units
Reduced Dust Binders
Improved American Mixers
Technology
1985
1965
1975
1995
Lime treatment
Earthworks
New
Treatment
Pavement
Codification
Embankment
Capping Layer
Pavement
Recycling
Applications

7. If issues are still the same …
1966
2005

8. … Technology has changed ! (Spreading)
1966
2005

9. … Technology has changed ! (Mixing)
1966
2005

10. … The binders have changed
Hydraulic Road Binders (HRB)
Reduced Dust Binders

11. Synopsis
Soil Treatment
Pavement Recycling
Materials Recycling

12. Definition (PIARC)
« The in situ Pavement Recycling consist in a modification of an existing old pavement into a homogeneous new pavement able to resist to traffic »

13. Progressive development in Europe
Some countries like :
Spain
Germany
France
The Netherlands

14. Synopsis
Soil Treatment
Pavement Recycling
Materials Recycling

15. Definition By-Products Construction Activities Modification
by treatment

16. Construction By-Products Management
Pressure from European & local regulations since mid 90’s
To stop the wild dumping of by-products
To reduce the production of by-products
To recycle and re-use materials By
Developing local recycling networks
Getting the commitment of public investors

17. Since 2002 Recycling process using treatment :
Sorting out
Crushing
Treatment of fine materials with a binder
Use by the contractor or put on the market (trench back-fill, embankments, pavements)
New recycling technology
Mobile units : trenches (~200t/j)
Semi-mobile units : (~400 à 600t/j)
Central plants : for local needs (> 800t/j)

18. Mobile units

19. Semi-mobile unit

20. Central Plants