projektiranje asfaltnih kolnika za velika 18. slovenko henigman.pdf · projektiranje asfaltnih...
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Projektiranje asfaltnih kolnika za velika opterečenja
Design of Heavy Load Asphalt Pavement
Slovenko Henigman
Opatija, April 5th 2019
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Content
• Introduction and Challenges of the Future
• Pavement design in Slovenia
• Pavement construction on Slovenian highways
• Pavement design for the heaviest traffic loads
• Conclusion
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Introduction and challenges for the future
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Avtonomous driving
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Bituminous/Concrete base
Component responsible for inductive power transfer
Platform 150 MPa
2 cm grouting
25 cm
aluminium supports
Prefab. slab
Inductive power transfer
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Emission free
Lessnoise
Wireless charging
Invisible à respect urban landscape
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• Pavement design in Slovenija
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Asphalt pavement – tehical regulations Vir: Z.Cotič
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Basics for the dimensioning according to TSC 06.520:2009 design of new pavement constructions
Ø Traffic loads TØ Load bearing capacity of the subgrade SØ Material quality aiØ Frost protection hmin
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Traffic loads- Tn
Calculation of the total (equivalent) traffic loads according to TSC 06.511/2009 (100 kN)
Tn = 365 x Td x fpp x fšp x fnn x fdv x ftp
It means:
Tn – predicted traffic load in –n- years(20 years)Td – ekvivalent daily traffic loadfpp - factor for the cross-section of pavement constructionfšp - factor for the width of the traffic lanefnn - faktor for the longitudinal slope fdv - faktor for additonal dinamic influencesftp - faktor for increased traffic load due to traffic growth over the life time
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Classification of traffic loads into traffic load groups
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Load bearing capacity of the subgrade S
Determine by the procedures defined in TSC 06.720: 2003 Measurements and tests. Deformation modules of embedded materials
- Probe holes (geological opinion)- Value of baring capacity index CBR – California Bearing Ratio
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Load bearing capacity of the subgradeS - CBR
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Material quality ai
Average values of the equivalence ratios for basic road construction materials
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TSC 06.512:Design. Climatological and hidrological conditions
The minimum required thickness of pavement structuree hmin
Ø Frost protection hmin
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Vremenski monitoringTemperature Portorož Ljubljana Slovenj Gradec Murska Sobota
- highest - °C 36,3 37,1 34,5 37,9- lowest - °C - 10,3 - 20,3 - 27,0 - 26,9
Temperature, percipitation and geological conditions
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Procedure for dimensioning
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Procedure for dimensioning
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An example of dimensioning Vir: Z.Cotič
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• Pavement construction on Slovenian highways
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2.VOZIŠČNEKONSTRUKCIJE (materiali,debeline, starost, itd.)
TRAFFIC
Pavement structure is the most important element of the road
• Level of service for the users (evenness, skid resistance)
• Environment protection (noise)
• Traffic safety(change of transverse slope between two curves)
• Sustainability(cracks, deformations, potholes, wear)
IMPORTANCE OF PAVEMENT STRUCTURES
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Motorways before 1994
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DBM 8s ali 11s - PmB III, 3 - 4 cm
BD 22S - PmB II, 7 - 8 cm
BD 22S ali BD 32S, 7 - 11 cm
CS 32, 20 cm
D 32, 25 cm
overtaking lane driving lane emergency lane
SMA 11 - PmB 4 cmAC 22 – PmB (SBIT) 7-8 cmAC 32-B 50/70 9-10 cmCS 32 20 - 25 cmS 32 25 - 30 cm
Typical pavement on motorways after Year 2000
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Traffic and Traffic Loads
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Traffic Loads on motorways in Slovenia
0,0
2.000,0
4.000,0
6.000,0
8.000,0
10.000,0
12.000,0
ESAL
100
kN
Year
Daily ESAL 100 kN passes
Kranj V-Z
Arja vas - Šentrupert
Senožeče - Gabrk
Lipovci
Grosuplje – Iv. Gorica
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Pavement Design
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0
5.000.000
10.000.000
15.000.000
20.000.000
25.000.000
30.000.000
35.000.000
40.000.000
45.000.000
1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024
NO
O 1
00 k
N
Leto
Število prehodov osi NOO 100 kN na AC A1/0041 Arja vas - Šentrupert
Kumulativne prometne obremenitve Dimenzionirano število prehodov
Traffic loads in 20 Years
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l (km) w (m) x (m2) % heavy loads x1 (m2)
Motorways + Expressways 762 22,00 16.764.000,00 16,00 2.682.240,00
Main and regional roads 5.936 7,00 41.552.000,00 3,00 1.246.560,00
Local roads and public ways 32.224 5,00 161.120.000,00 3,00 4.833.600,00
All together (km): 38.922 219.436.000,00 8.762.400,003,99%
Decision on the use of concrete on motorways:
• In tunnels• Lanes for slow moving traffic and at• Toll stations
Heavy loaded Roads in Slovenia
The surface of heavy loaded roads is less than 4 %
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Pavement structures – asphalt : concrete
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Cement stabilisation
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Dynamic laboratory tests
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Low Temperature Behavior
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Grafikon 5: Rezultati preiskav pri nizkih temperaturah (vir: podatki inštitutov in DRI upravljanje investicij)
3,5
5,85,0
4,2
5,85,2 5,3 5,0
5,54,7
5,65,0 5,0
6,15,5
5,14,5
3,9
5,1 5,14,4
6,2
5,0
3,4
6,7
2,8
4,3
5,66,3
2,8
3,9
6,6
-12,9
-10,3
-12,1-11,2 -11,1
-11,8 -11,6
-10,4
-11,8 -11,5 -11,5 -11,2-10,6 -10,3 -10
-11,1 -11,4
-15,1
-13,9
-15,6
-12,2
-13,9-13,1
-10
-13,8
-3,3
-12,7-13,1
-14,7
-11,1-11,7
-12,2
-20,0
-15,0
-10,0
-5,0
0,0
5,0
10,0
SMA11
SMA11
SMA11
SMA11
SMA 8 SMA11
SMA11
SMA 8 SMA11
SMA11
SMA11
SMA11
SMA11
SMA11
SMA11
SMA11
SMA11
SMA11
SMA11
SMA11
SMA11
SMA11 ž
SMA11
SMA11
SMA11
SMA11 LN
SMA11 LN
SMA11
SMA11
SMA11og
SMA 8LN
SMA11
Naj
večj
are
zerv
a na
tezn
e na
peto
sti (
MPa
) -gr
af zg
oraj
Tem
pera
tura
pri
najv
ečji
reze
rvi n
atez
ne n
apet
osti
(st C
)gr
af sp
odaj
The max reserve tensile strenght stress (in MPa) and the corresponding temperature(st. C)
Dynamic laboratory tests – Low Temperature Behavior
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• Pavement design for the heaviest traffic loads
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Heaviest traffic loads on pavement structures
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Layers in the pavement
• Binder courses mainly absorb the load
• Higher investment in binder will most probably ensure a high durability of the pavement
• However, the design of binder course should be harmonised with other courses
• The value of the layer under the pavement construction
max. τ
How to tackle the challenge of heavy loaded areas at airports, ports…?
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Standard Requirements and practise for heavy loaded asphalt pavement construction (Wearing, binder and base layer)
Standard requirementsAsphalt layer
wearing SMA binder AC base ACVhodni materialiKAMENE ZMESI ZRNdelež drobljenih zrn % 100 100 100LA 20 30 30
VEZIVA
PmB
PmB 45/80-65 PmB 10/40-60, PmB 25/55-65
BIT 50/70 + nat. bit.BIT 50/70
ASFALTNE ZMESI - MarshallProste votline - min % 2,5 4 5Proste votline - max % 4,5 7 7Delež bitumna %Zapolnjenost votlin z bitumnom % 74-89 55-77 50-68
ASFALTNE PLASTIZlepljenost plasti - Leutnerdebelina mm 30 - 50 70 - 100 80 - 120zgoščenost % ≥ 98 ≥ 98 ≥ 98votline v plasti % 6,5 9 9
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Requirements for the asphalt pavement construction on roads • Wearing, binder and base layer
Test Asphalt layerwearing binder base
High temperature: Wheel tracking
PRD air 5,0 % PRD air 3,0 % PRD air 7,0 %
Low temperature: Max Reserve of Tensile Stress
5 Mpa NR NR
The whole temperature range: Fatique
NR NR NR
The whole temperature range Stiffness
NR NR NR
• Cement stabilization (compressive strength to 5 Mpa)
• A well hardened and high quality subbase layer:
(load capacity, at least 80 -100 Mpa, CBR > 20%)
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Requirements for the asphalt pavement construction on othersurfaces
• Wearing, binder and base layer
Test Asphalt layerwearing binder base
High temperature: Wheel tracking
PRD air 3,0 % PRD air 2,0 % PRD air 4,0 %
Low temperature: Max Reserve of Tensile Stress
5 Mpa NR NR
The whole temperature range: Fatique
NR NR NR
The whole temperature range Stiffness
NR NR NR
• Cement stabilization (compressive strength to 5 Mpa)
• A well hardened and high quality subbase layer:
(load capacity, at least 80 -100 Mpa, CBR > 20%)
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Wearing courseSMA 8 ali 11, PA + cem. mix
Binder courseAC 22, SMA 16 ali 22, HMA
Mesh
Base courseAC 32 ali 22
Cement stabilization - CS 32
Crashed stone - C 32
Recommended pavement design for the heaviest traffic loads
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Requirements for asphalt layers and materials• Types of materials in wearing layer
• Type of mixutre: SMA, PA + cement mort (half rigid system)
• Binder + additive: PmB 45/80-65, rubber, waxes,…
• Agregat: 100% crushed, light
• Requirements for binder layer • Type of mixutre : AC, SMA, HMA
• Binder (and additives): PmB 10/40-60, PmB 25/55-65, B50/70 + natural bitumen, waxes
• Agregat: 100% crushed
• Requirements for base layer • Type of mixutre: AC
• Binder: B 50/70, B50/70 + natural bitumen, B70/100 + natural bitumen
• Agregat: 100% crushed
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ASDIM (FSV-Austria)
Limited values for stiffness and fatique (4PB).
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PaDeSto (Primia - Germany)
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Pavement construction on the roads with the haviest traffic loads
When dimensioning is completed and the contractor has been
chosen, the following is recommended
• Execution of test fields and
• On the basis of the result of the test fields, the final
implementation can start.
RECOMMENDATIONS TO THE CLIENTS
• Research & development
• Analytic verification of dimensioning (npr. AsDim, Padesto,…)
• Constant monitoring of experimental fields
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Conclusion
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Conclusion
1. Heavy loaded asphalt surfaces are small in comparison to all asphalt
surfaces
2. Heavy loaded asphalt surfaces are a challenge for asphalt industry
3. The requirements for the quality of heavy loaded surfaces will increase in
the future - for example, self driving vehicles.
4. Dynamic tests in the entire temperature range and advanced software
are available, but without proper requirements
5. What is our task?
a) Determine the requirements for a certain test.
b) Define the expected warranty period with the requirements.
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4. Workshop Pavement Design, Croatia 2020 ?
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• Prepared by – SLOMAN d.o.o.
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Thank you for your [email protected]