VARIOMATIC 2 + Asphalt- 14 Compaction of 6 cm asphalt binder course 0/10, ... vs. Marshall density [%] Compaction test on asphalt wearing course ... is of sufficient stability,

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Text of VARIOMATIC 2 + Asphalt- 14 Compaction of 6 cm asphalt binder course 0/10, ... vs. Marshall density...

  • 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