Tire derived aggregate

Transcription

Tire derived aggregate
Tire derived aggregate
A civil engineering product
for the future
• ..\Miniseminar on shredded tires.doc
30. June 2005
Design, behavior, and Benefits of Highway Materials
Using Recycled Tire Rubber
INTERNATIONAL
STANDARDS:
USA: ”Standard Practice for use of Scrap tires in CEA”
EUROPA:
CEN WORKSHOP AGREEMENT
Guideline for for producers of the material.
Declaration of the material
Application areas
Increase the
stability against
failures
Reduce
settlements
Bygging av fylling med
bildekk på SULA
(Ca 1993)
Vegdirektoratet tidlig
ute med utprøving av bildekk som lett fyllmasse
What is a recycled material? Four prinsiples.
1) Function in construction other than volume.
E.g. density, isolation, strain.
2) Predefined technical specifications.
E.g. Particle size, purity, density, leaching behavior.
3) Saleable in a commercial marked.
Application must be sustainable for the buyer
4) Clean product.
Not polluted by waste or contain/leach hazardous
substances
Ref: www.sft.no/publikasjoner/avfall/1853/ta1853.html
Light weight fills and insulation materials
Foamglass …shredded tires…
……flyash – small amounts
in Norway
Competitors in 2004 for lightweight fill
and insulation materials.
Ekspanded polystyrene (EPS):
Design density γ = 0,5 kN/m3
Includes recycling of blocks
.
Light Weight clay Aggregate
grain size: 0 - 32 mm /10-20mm
monitoring programme
Design density γ = 6 kN/m3
Light weight materials (EUR/m3)
Shredded
tires:
No cost so far!
Design
density:
7 kN/m3
40
35
30
25
20
15
10
5
0
Foamglass
Design density:
3,5-4 kN/m3
LWA
5,5 kN /m3
EPS
0,5 kN/m3
European road E6 – Huggenes noise
barrier
•Environmental assessment
•Technical evaluation
•Monitoring program
Sustainable?
Leaching?
E6
Collecting infiltrated water
at K1
K1
2004 – NPRA stops further use of
shredded tires due to conserns from SFT
• brev fra SFT - sept 04 - Fetsund.pdf
Main conserns:
• Octylphenols
• Bisphenol A
• Elevated levels of lead and copper
Texas Natural Resource
Conservation Commission
Texas Department
of Transportation
Cooperation between the Road Authoritees and
the enviromental authoritees
Be bright
Think light
And do it right !
Let us have a good discussion !
Vegdirektoratet
Vegteknisk avd.

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