Soil and Asphalt compaction - BOMAG .Soil and Asphalt compaction equipment ... single drum rollers ... Methods and equipment for the reconstruction of low trafficed roads and road

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  • 03/04 Art. No. WM 9703

    Soil and Asphalt compaction

  • Soil and Asphalt compaction equipment

    Engin de compactage des solset des mlanges bitumineuxVerdichtungsgerte fr den Erd- und Asphaltbau

    AsphaltdeckschichtAsphalt wearing courseCouche de roulementAsphalttragschichtAsphalt base courseCouche de base

    KiesGravelGravier

    Kies-SandGravel-sandGrave

    LehmLoamSable argileux

    BAO1e-02/04

  • gravel

    subbase

    capping layer

    asphalt base course

    asphalt wearing course

    bearing capacity

    asphalt binder course

    Structure and properties of a flexible pavement

    shear resistance

    riding quality, skid resistance, impermeability

    pavement

    subgrade/embankment

    gravel - sand loam

    formation

    BAO1e-03/03

    impermeability

  • Increased bearingcapacityIncreased durability

    Higher resistanceto deformationHigher resistanceto frost damage

    Increased stabilityDecreasedpermeability

    Objectives of compaction

    Poorcompaction

    Goodcompaction

    Poorcompaction

    Goodcompaction

    Poorcompaction

    Goodcompaction

    Asphalt wearing course

    Asphalt base course

    Gravel-sand

    Gravel

    Sand

    Loam BAO1e-04/03

  • Soil compactionSoil type definitions

    Gravel

    Loam

    coarse aggregategranularnon-cohesive

    fine aggregatenon-granularcohesive

    BAO01e-05/03

  • after compaction

    Soil compaction

    before compaction

    Granular Cohesive

    BAO1e-06/03

  • 100

    90

    80

    70

    60

    50

    40

    30

    20

    10

    0 0 0,002 0,06 2 60

    100

    90

    80

    70

    60

    50

    40

    30

    20

    10

    00 0,002 0,06 2 60

    1

    3

    2

    4

    1

    2

    3

    4

    particle size in mm

    particle size in mm

    Clay Silt Sand Gravel

    Soil compactionSieving and particle size distribution

    silty clay

    uniform sand

    Gravel - silt

    Gravel - sand

    per

    cen

    t p

    assi

    ng

    by

    wei

    gh

    tp

    erce

    nt

    pas

    sin

    g b

    y w

    eig

    ht

    BAO1e-07/03

  • Soil compactionInfluence of water content on compactability

    Proctor curve

    max. Density

    op

    tim

    um

    mo

    istu

    re c

    on

    ten

    t

    Moisture content

    Dry density

    low moisture content high internal friction low density

    optimum moisture content best compactability max. density

    high moisture content high water pressure low density BAO1e-08/03

  • 20151050

    1.5

    1.6

    1.7

    1.8

    0 20 255 10 15

    1

    2

    3

    4

    5

    1

    3

    2

    4

    5

    BAO1e-09/03Gravel -sand

    Proctor test

    Modifiedproctor test4.5 kg falling weight450 mm falling height25 blows per layer

    Standardproctor test2,5 kg falling weight300 mm falling height25 blows per layer

    Soil compactionProctor curve

    Moisture content (%)

    Proctor curves ofdifferent soil types

    sandy gravel

    uniform sand

    Gravel - sand

    sandy silt

    heavy clay

    Proctor curve

    Proctor density

    optimummoisturecontent

    Dry density (t/m3)

    Moisture content (%)

    1.9

    1.5

    1.7

    1.8

    2.0

    2.1

    2.2

    Dry density (t/m3)

    1.6

  • BAO1e-10/03

    Soil compactionCoarse aggregate

    Sand Gravel

    Applicationprimarily for embankments subbases and bases for road, rail track and airport construction foundations for buildings trenches and backfills

    Sand 0,06 - 2 mm Gravel 2 - 60 mm

    Compactability depends on grading too much compaction may be detrimental

    Compaction equipment vibratory tandem rollers and single drum rollers (smooth drum) heavy and medium size plates

    Rockfill Cobbles Boulders

    Applicationprimarily for dam construction embankments for road, rail track and airport construction foundations for buildings

    Cobbles > 60 mm Boulders > 100 mm

    Compactability layer thickness should be three times thicker than max. particle size material needs high compaction energy

    Compaction equipmentprimarily heavy single drum rollers heavy plates

    Fine aggregate Clay Silt

    Applicationprimarily for dam construction embankments for road, rail track and airport construction trenches and backfills sanitary landfill construction

    Clay < 0,002mm Silt 0,002-0,06mm

    Compactability difficult to compact due to cohesion compaction effect depends strongly on water content material needs high compaction energyCompaction equipmentprimarily heavy and medium size single drum rollers (smooth and padfoot drum) trench compactors and heavy plates

  • 1,5 - 6 cm

    4 - 10 cm

    8 - 20 cm

    asphalt wearing courseasphalt binder course

    asphalt base course

    92 - 97% aggregate

    3 - 8% binder

    Asphalt Macadams

    Asphalt compaction

    BAO1e-11/03

  • Asphalt compaction

    mix design

    gravel low stonecontent

    small max.stone size

    lowfiller content

    high penetrationbitumen

    crushedaggregate

    high stonecontent

    high max.stone size

    highfiller content

    low penetrationbitumen

    properties application

    low stability sensitive to shoving sensitive to rippling easy to compact

    lightly trafficked roads secondary roads local roads cycle ways parking areas

    high stability high internal friction difficult to compact

    heavily trafficked roads motorways national roads airports

    BAO1e-12/03

  • BAO1e-13/04Gravel-sand

    Asphalt wearing course

    Asphalt base course

    Static compactionsingle drum and tandem rollers

    Applicationssurface compactionwet cohesive soils in thinlayer applications

    Applications finish rolling precompaction of tender mixes thin layers on stiff bases

    Compaction principleonly static pressurelimited depth effect

    Key parameterstatic linear load

  • Compaction principleground pressure and kneading effect

    Key parameters wheel load tyre pressure

    Asphalt binder course

    Sand

    Static compactionpneumatic tyred rollers

    contact pressurerange 0,20 - 0,80 MPa

    BAO1e-14/04

    Applications surface dressing precompaction of tender asphalt mixes finish rolling on asphalt thin granular soil layers surface finishing on cohesive soil layers

  • non-reversible vibratory plates

    Applications thin layers granular materials bituminous materials block paving

    reversible vibratory plates

    Applications thin and thick layers granular materials mixed soils paving blocks

    Compaction principledynamic energyKey parameters weight amplitude frequency

    BAO1e-15/03Gravel

    Vibratory compaction plate compactors

  • BAO1e-16/03

    Asphalt base course

    Gravel -sand

    Vibratory compaction tandem rollers with circular exciter system

    Application asphalt surfacing asphalt bases overlay compaction on granular bases

    lowamplitude

    highamplitude

    Application asphalt bases granular bases cement bound bases subbases

    Asphalt wearing course

    Compaction principlestatic pressureand dynamic energy

    key parameters static linear load vibrating mass amplitude frequency

  • BAO1e-17/04Gravel-sand

    Vibratory compaction single drum rollers with circular exciter system

    Application thin layers granular materials granular bases overlay compaction on thick granular layers

    Application thick layers granular and cohesive materials cement bound materials subbases embankments dams

    Compaction principlestatic pressure anddynamic energy

    Key parameters static linear load vibrating mass amplitude frequency

    lowamplitude

    highamplitude

  • BAO1e-18/04

    Applications: all soil types, granular bases and subbases

    high dynamic energy due to vertically directed vibrations

    Compaction effectDeadweight and dynamic energy,the compaction effect is automaticallyadapted to compactibility of material,layer thickness and subbase.

    low dynamic energydue to horizontallydirected vibrations

    Vibratory compaction Asphalt Manager with directed vibrator systemDirection of vibration adjustable and automatically regulating

    Gravel-sand

  • BAO1e-19/03

    Applications: all soil types, granular bases and subbases

    high dynamic energy due to vertically directed vibrations

    Compaction effectDeadweight and dynamic energy,the compaction effect is automaticallyadapted to compactibility of material,layer thickness and subbase.

    low dynamic energydue to horizontallydirected vibrations

    Vibratory compaction Asphalt Manager with directed vibrator systemDirection of vibration adjustable and automatically regulating

    Gravel-sand

  • BAO1e-20/04

    Applications: all soil types,granular bases and subbases.

    Gravel-sand

    Compaction effectDeadweight and dynamic energy,the compaction effect is automaticallyadapted to compactibility of material,layer thickness and subbase.

    high dynamic energydue to vertically directed vibrations

    low dynamic energydue to horizontallydirected vibrations

    VARIOCONTROL single drum rollers with directed vibrator systemadjustable and automatically regulating

  • a

    a

    Vibratory compactionkey parameters of vibratory rollers

    2 - 13 t 10 - 30 kg/cm 0,5 - 2,5 t 0,2 - 0,9