sustainable asphalt concepts - aapaqtmr.org · 2.000.000,00 2.500.000,00 3.000.000,00 1959 1961...
TRANSCRIPT
![Page 1: Sustainable Asphalt Concepts - aapaqtmr.org · 2.000.000,00 2.500.000,00 3.000.000,00 1959 1961 1963 1965 1967 1969 1971 1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995](https://reader034.vdocuments.mx/reader034/viewer/2022042214/5eba70ac3d757c05d9451f49/html5/thumbnails/1.jpg)
Dipl.-Ing. Kerstin Gärtner, August 2011
SustainableAsphalt Concepts
Dipl.-Ing. Kerstin Gärtner
Highway Authority Bavaria North
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Dipl.-Ing. Kerstin Gärtner, August 2011
The Central European Highway Network
Germany
North Bavaria
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Dipl.-Ing. Kerstin Gärtner, August 2011
Highway Authority Bavaria North in Nürnberg
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Dipl.-Ing. Kerstin Gärtner, August 2011
Federal Highway Network in Northern Bavaria
Network:
1.320 km highway network
2.960 engineering structures
34 service stations / picnic areas
68 parking areas with facilities
• Head quarters in
Nürnberg
• 3 offices in Fürth,
Bayreuth, Würzburg
• 17 maintenance units
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Dipl.-Ing. Kerstin Gärtner, August 2011
OUR TARGET
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Dipl.-Ing. Kerstin Gärtner, August 2011
Criteria for Choosing Asphalt Mixes
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Dipl.-Ing. Kerstin Gärtner, August 2011
Highway - Requirements
Performance/Safety
Skid resistance
No deformation
No cracks
Evenness
Noise reduction
Economical Environmental
Sustainability
Durability
Initial costs
vs.
Life cycle costs
Criteria
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Dipl.-Ing. Kerstin Gärtner, August 2011
Road Class Base Course Binder Course Surface Course
AC SMA MA PA
SV / I AC 32 TS / AC 22 TS AC 16 BS - SMA 8 S / 11 S MA 8 S PA 8
II AC 32 TS / AC 22 TS AC 16 BS AC 11 DS / AC 8 DS SMA 8 S / 11 S
III AC 32 TS / AC 22 TS AC 11 DS / AC 8 DS SMA 8 S / 11 S
IV AC 32 TN / AC 22 TN AC 11 DN / AC 8 DN SMA 8 S / 11 S
V
VI
Extract from ZTV Asphalt –StB 07
Criteria
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Dipl.-Ing. Kerstin Gärtner, August 2011
Road Class Base Course Binder Course Surface Course
AC SMA MA PA
SV / I AC 32 TS / AC 22 TS AC 16 BS - SMA 8 S / 11 S MA 8 S PA 8
II AC 32 TS / AC 22 TS AC 16 BS AC 11 DS / AC 8 DS SMA 8 S / 11 S
III AC 32 TS / AC 22 TS AC 11 DS / AC 8 DS SMA 8 S / 11 S
IV AC 32 TN / AC 22 TN AC 11 DN / AC 8 DN SMA 8 S / 11 S
V
VI
Criteria
Extract from ZTV Asphalt –StB 07
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Dipl.-Ing. Kerstin Gärtner, August 2011
Road Class Base Course Binder Course Surface Course
AC SMA MA PA
SV / I AC 32 TS / AC 22 TS AC 16 BS - SMA 8 S / 11 S MA 8 S PA 8
II AC 32 TS / AC 22 TS AC 16 BS AC 11 DS / AC 8 DS SMA 8 S / 11 S
III AC 32 TS / AC 22 TS AC 11 DS / AC 8 DS SMA 8 S / 11 S
IV AC 32 TN / AC 22 TN AC 11 DN / AC 8 DN SMA 8 S / 11 S
V
VI
Criteria
Extract from ZTV Asphalt –StB 07
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability
Criteria
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Dipl.-Ing. Kerstin Gärtner, August 2011
High load
SMA 8 SSMA 8 S
SMA 8 S
How can we achieve that?
Criteria
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
Properties Requirements Main Influence on
Crushed Surface C 100/0
(100% crushed
surface)
Void content
Stability
Hardness LA < 20 No particle sizes’
destruction
during compaction
Resistance to
Polishing
PSV > 51 Roughness
Skid resistance
Shape Index 3:1 (min. 80%) Void content
Degree of filling
Compaction degree
Stability
Fines ECS 35 Void content
Stability
Filler Limestone Void content
Oversize/Undersize according to sep.
specs
Void content
Stability
Aggregate Requirements
TL Gestein –StB 04
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
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Dipl.-Ing. Kerstin Gärtner, August 2011
Binder Requirements
Polymer modified binders for heavy duty traffic
25/55-55 A
25/55 Penetration
55 Softening point
A Group of polymers
Sustainability = SMA
TL Bitumen –StB 07
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Dipl.-Ing. Kerstin Gärtner, August 2011
Binder Requirements
Penetration
Softening point ring and ball
Ductility
Breakpoint Fraaß
Elastic recovery (25°C and 10°C)
DSR
BBR
2 groups of polymers
A Elastomers
C Plastomers
Sustainability = SMA
TL Bitumen –StB 07
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
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Dipl.-Ing. Kerstin Gärtner, August 2011
Additives
Sustainability = SMA
Mandatory
Fibers as drainage inhibitors
(preferably bitumen coated cellulose fiber pellets)
Optional
Additives for temperature reduction
Additives for easier compaction
Additives for earlier opening of sites for traffic (to be tested)
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
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Dipl.-Ing. Kerstin Gärtner, August 2011
German Specifications
Pass
ing
in
M.-
%
Sieve sizes in mm
SMA 8 S
Extract from TL Asphalt –StB 07
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Dipl.-Ing. Kerstin Gärtner, August 2011
Unit SMA 11 S SMA 8 S
Composition of asphalt mixture
Aggregate mixture
passing sieve at
16 mm M.-% 100
11.2 mm M.-% 90 - 100 100
8.0 mm M.-% 50 - 65 90 - 100
5.6 mm M.-% 35 - 45 35 - 55
2.0 mm M.-% 20 - 30 20 - 30
0.063 mm M.-% 8 - 12 8 - 12
Minimum binder content Bmin 6.6 Bmin 7.2
Stabilizing additiv M.-% 0.3 – 1.5 0.3 – 1.5
Sustainability = SMA
Mix Design
Extract from TL Asphalt –StB 07
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Dipl.-Ing. Kerstin Gärtner, August 2011
SMA 11 S SMA 8 S
Asphalt mixture
Min. void content Marshall-Specimen Vmin 2.5 Vmin 2.5
Max. void content Marshall-Specimen Vmax 3.0 Vmax 3.0
Void filled with bitumen (VFB) is to be specified is to be specified
Proportional rut depth is to be specified is to be specified
Sustainability = SMA
Mix Design
Extract from TL Asphalt –StB 07
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
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Dipl.-Ing. Kerstin Gärtner, August 2011
Production
Aggregates‘ stock
Bitumen tanks
Number of bins – cold and hot
Filler feed system
Fiber feed system
Temperatures
Storage for ready mix
Quality control
Sustainability = SMA
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
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Dipl.-Ing. Kerstin Gärtner, August 2011
Cover the mixture during transport
Sustainability = SMA
Transport(logistics)
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Dipl.-Ing. Kerstin Gärtner, August 2011
Rollers
Sustainability = SMA
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Dipl.-Ing. Kerstin Gärtner, August 2011
Gritting
Sustainability = SMA
Chippings 1 to 3 mm
0,5 – 1,0 kg/m2
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
1. Aggregates
2. Binder
3. Additives
4. Mix Design
5. Production
6. Pavement & Compaction
7. Quality Control
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
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Dipl.-Ing. Kerstin Gärtner, August 2011
No temperature differences at tamper
e.g. temperature distribution after stop of paver
Critical compaction in cooler areas
Sustainability = SMA
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
Compaction degree
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
Samples taken on site
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
Extract from ZTV Asphalt –StB 07
Characteristics of layerSMA 11 S SMA 8 S
Laying thickness cm 3.5 – 4.0 3.0 – 4.0
Laying amount kg/m² 85 - 100 75 - 100
Compaction degree % ≥ 97 ≥ 97
Void content Vol.-% < 5.0 < 5.0
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Dipl.-Ing. Kerstin Gärtner, August 2011
Asphalt – types of mixtures
Supplementary Technical Conditions of Contract, Specifications and Guidelines
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
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Dipl.-Ing. Kerstin Gärtner, August 2011
Sustainability = SMA
Long-Life Asphalt Pavements
http://www.eapa.org/
Long-Life Asphalt Pavements
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Dipl.-Ing. Kerstin Gärtner, August 2011
Results
Sustainability = SMA
Long-Life Asphalt Pavements
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Dipl.-Ing. Kerstin Gärtner, August 2011
Zusammenstellung der Decken nach Art und Baujahr
der ABD - Nordbayern
( Gesamtfläche ca. 30,9 Mio m² )
0,00
500.000,00
1.000.000,00
1.500.000,00
2.000.000,00
2.500.000,00
3.000.000,00
1959
1961
1963
1965
1967
1969
1971
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
2007
2009
Baujahre
Flä
ch
e in
m²
Sonderbauw.
Offenporiger Asphalt
Asphaltbeton
Zementbeton
Splittmastixasphalt
Gußasphalt
Surface courses applied by Highway Authority Bavaria North
(Total area approx. 30.9 million m²)
Year of construction
Are
a i
n m
²
SMACement
Concrete
PAAC
MA
Sustainability = SMA
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Dipl.-Ing. Kerstin Gärtner, August 2011
?
Highway - Requirements
Performance/Safety
Noise reduction
Economical Environmental