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Slide 1
Asphalt ManagerIntelligent Compaction
Slide 2
WHAT IS INTELLIGENCE
1)Collect Information
2)Use the Collected Information to Make a Decision
3) Execute the Decision
Slide 3
History
Surface Covering Compaction Measurement1983 Terrameter BTM 01 ( OMEGA )
1993 Guidelines for Surface Covering MeasurementsNational Research Association
1994 ZTVE / TP BF-StB 94, proof methods FDVK/ SCCC
1996 Compaction Management System BCM 03
1998 VARIOCONTROL
2001 Measuring device for evaluation of stiffness (Evib)
2004 Modular Measuring System with GPS support
Slide 4
History
BOMAG Compaction Technology
1996 Variomatic for asphalt rollers
1998 Variocontrol for soil rollers
2000 Evib (MN/m)
2001 Asphalt Manager
2004 Research project of German DOT (BAST), Oct / Nov. 2004;
Slide 5
VARIOMATIC roller with directed vibration
Control unit
Slide 6
Asphalt Manager
Worldwide proven design:
Several hundreds Tandem rollersBW 151 AD-2
BW 174 AD
Slide 7
Vibration Systems
Rotary exciter Oscillation directed
Slide 8
Vibration Systems
Rotary exciter Oscillation directed
Slide 9
BOMAG Rotary Exciter
Non Directed Forces:
Slide 10
Vibration systems / Overview
Vibration Oscillation Variomatic
Principle Rotary exciter with 2 rotary exciters with 2 2 rotary exciters with 2unbalanced weight unbalanced weight unbalanced weight
counter rotating
Oscillation non directed directed directed - horizontally horizontally to vertically
Amplitudes up to 8 2 fixed amplitudes automatic variationup to 1,3 mm ca. 1,3 mm 0 - 0,9 mm
horizontal/verticalFrequencies 35 -70 Hz 33 - 42 Hz 35 - 50 HzControl system manual manual automatic variation
Slide 11
Depth effect
Comparison:
Rotary exciter (no infinite variation)
Variomatic(automatic compaction)
Slide 12
Directed exciter system
Advantages vs. Rotary exciter:
Better depth effect
Excellent Asphalt surfaces
- Eveness- Grip / roughness
Slide 13
Benefits for contractors: Universal use on - Road base - Wearing course layers - Thin layers
Higher compaction performance
Uniform compaction, even on sub-bases with inhomogeneous stiffness
Asphalt Manager
Better eveness and more uniform surface structure
Low tendency to scuffing
Slide 14
Compaction of 6 cm asphalt binder course 0/10, RN13 FranceOperating weight and compaction technique affect smoothness
and eveness
8 t BOMAG VARIOMATIC BW 151 AD8 passes
15 t tandem vibratory roller8 passes
Slide 15
Density and roughness measurement on asphalt binder layer
Punctual compaction measurement withportable isotope probe
Continuous compaction measurementwith mobile isotope probe[1 measurement / 10 m]]
Slide 16
Compaction RoughnessPortable
isotope probeMobile isotope
probe[1 measurem./10 m]
Sand spot method
n X1 n X1 n X2 4 passes with 25 t rubbertire roller and 4 passeswith 15 t tandem vibratoryroller
14 92,5%
1,22 59 94,6%
1,29 12 0,46 mm 0,07
8 passes withBW 151 AD-2 VARIOMATIC 14 92,5
%0,54 59 93,8
%1,06 12 0,60 mm 0,05
n = number of measurements, X1 = mean value of achieved Gyrator test compaction value (93% Gyrator value ~ 98%Marshall value), X2 =mean value of characteristic roughness value
Comparison between conventional compaction concept and VARIOMATIC
Slide 17
1996 1998
Variomatic Variomatic 2
advanced, more powerful
also for split drums !
Slide 18
Latest developments of compaction technology
1996 Variomatic for asphalt rollers
1998 Variocontrol for soil rollers
2000 Evib (MN/m)
2001 Asphalt Manager
Slide 19
Directed Exciter System
Vibration motor
Exciter housing (slewable)
Unbalanced weights(counter rotating)inner: No. 2 + 3outer: No. 1 + 4
Compaction force Slewing motor
Travel motor
Slide 20
BOMAG VARIOCONTROL
Force Direction Control:Infinite adjustment of exciter housing from horizontal to vertical.
Slide 21
Slide 22
Asphalt Manager with new measuring value EVIB [MN/m]and temperature gauge
Slide 23
Acceleration meters
Force directioncontrol
Slide 24
Asphalt Manager
Benefits for Operators:
No critical decisions required
All operators achieve better results:- good and uniform compaction
Continuous information on - asphalt temperature- compaction increase
Slide 25
Slide 26
The Operator
Asphalt Manager: Easy to understand
Slide 27
Asphaltmanager
Technical Data
Oper.weight kg 8.000 8.400 12.000 13.100 Drum width in 59 66 79 84Amplitudesfront mm 0,96 0,95 0,93 0,73rear mm 0,64 / 0,27 0,6 / 0,25 0,86 + 0,37 0,7 / 0, 3Frequencies front / rear Hz 45 45 40 + 50 / 46+57 40+50 / 40+50Centr. force front kN 160 168 247 / 158 247 /158rear kN 80 / 34 80 / 34 167 / 109 126 / 84
PARAMETERS BW 141 / 151 AD BW 190 / 203 ADAM AM
Front: AM Rear: Std. Exciter
Slide 28
Bomag Operational Panel
Compaction ModesManual - Auto6 x 3 x
0 fixed variable0,2 mm 0 - 0,2 mm0,4 0,6 0 - 0,60,70,93 0 - 0,93
0,08 in
0,24 in
0,37 in
Slide 29
Bomag Operational Panel
PRINTER- Start- Stop- Print out- Delete
Test procedere:
- Mark the track to be compacted- Manual operation mode with- Fixed amplitude- Fixed working speed
Slide 30
Bomag Operational Panel
SETTINGS- Escape- Enter
Slide 31
Slide 32
Slide 33
Printer
Slide 34
EVIB - Printer
EVIB Max. / EVIB Min.
EVIB Average
Frequency
Average Speed
Track length
Temperature
Slide 35
EVIB and Density as function of passes; BW 174 AD Asphalt Manager, Automatic mode; Asphalt Base 0/32 CS B65, Nrnberg A3
4 cm SMA 0/11 S8 cm Binder 0/22> 10 cm ATS 0/32
100120140160180200220240260280
0 1 2 3 4 5 68486889092949698100102
[%]
Passes
E VIB
[MN
/m],
[
C]
EvibSurface temp.
Core temp.
Troxler density
Slide 36
EVIB and Density as function of passes; BW 174 AD Asphalt Manager, Manual mode 4; Wearing course SMA 0/11S PmB45, Nrnberg A3
4 cm SMA 0/11 S8 cm Binder 0/22> 10 cm ATS 0/32
Passes
E VIB
[M
N/m
], [
C]
100120140160180200220240260280300
0 1 2 3 4 5 6
80828486889092949698100
[%]
Evib
Surface temp.
Core temp.
Troxler density
Slide 37
Asphalt Manager
Advantages: Immediate determination of dynamic stiffness in MN/m (EVIB) EVIB can be correlated with the increase of compaction EVIB is widely independent from roller parameters EVIB printouts for area covering compaction control
In Development: Target EVIB values to be pre-selectable Ready indication if target value is achieved (red light) Ready indication if no further compaction is possible
(red light)
Slide 38
Number of passes with vibratory rollers
Recommended figures:
Layer thickness d [cm]
No. of passes with vibration of different tandem rollers
3 t 6 t 9 t246101418
2 - 4 1 - 2 (L) 1 - 2 (L)4 - 6 2 - 4 (L) 2 - 4 (L)4 - 8 4 - 6 (L) 2 - 4 (L)6 - 8 4 - 8 (L, H) 4 - 6 (L, H)
-- 6 - 8 (H) 4 - 6 (H)-- 6 - 8 (H) 4 - 8 (H)
-- 1 - 2 (L) + stat. passes 1 - 2 (L) + stat. passes-- 4 - 6 (L) + stat. passes 4 - 6 (L) + stat. passes
-- 1 - 2 (L) + stat. passes 1 - 2 (L) + stat. passes
SMA d = 2( Stone mastix ) d = 4
Porous asphalt d = 4
L = low amplitude, H = high amplitude Assumption: Compaction temperature > 100C3 t = Machine with only the amplitude
Slide 39
VARIOMATIC 2
Further advantages: better gradability- less shoving effect
Automatic force adaption with travel direction
Slide 40
Asphalt-Manager
Evib (MN/m) Vibration modulus
Equivalent for dynamic Stiffness;
Directly picked up by the roller;
Physical value for compaction increase on asphalt.
Slide 41
Asphalt Manager
Benefits for Contractors:
Compaction- Uniform and predictable results whilst rolling- Avoids under / overcompaction- Better eveness and roughness- Eliminates drum bouncing
Investment for Profit
Economical and quality aspects- More efficient roller utilization with fewer passes- Reduced shock loads in sensitive environmente.g. buildings, bridges
- Area coverage method
Slide 42
Temperature development
Base course - Temperature profilevs. No. of passes
0123456789
101112
50 60 70 80 90 100 110 120 130 140 150 160 170
Temperature [C]
Thic
knes
s [m
m]
1.
2.
3.
4.
5.
6.
Slide 43
EVIB [MN/m] vs. Marshall density [%]
Compaction test on asphalt wearing course (stone mastix asphalt)
Perfe
