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SASOBIT - HMA, WMA, RAP

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    for use in Hot Mix Asphalt (HMA), Warm Mix Asphalt (WMA) andfor use in Hot Mix Asphalt (HMA), Warm Mix Asphalt (WMA) and

    Recycled Asphalt Pavement (RAP) TechnologiesRecycled Asphalt Pavement (RAP) Technologies

    Promoted Presented in !ndia "y#Promoted Presented in !ndia "y#

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    Contents

    What is Sasobit

    How to use Sasobit

    Influence of Sasobit on performance properties of Bitumen Softening Point Penetration values Fuel Resistance

    IRC, New Delhi 20.10.2014 3

    Case Studies:

    Frankfurt International Airport CRRI CRRI + IIT Roorkee

    IIT Guwahati IIT Bombay

    Cost Comparison Conclusion

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    A high molecular mass synthetic aliphatic Fischer Tropsch hydrocarbon

    Molecule length between C40 and C120

    What is Sasobit?

    IRC, New Delhi 20.10.2014 4

    High melting - congealing point min. 99C, melt range 70-115C Hard - needle penetration < 1 dmm at 25C

    Low viscosity - 12 cP at 135C

    Does not have any chemical reaction with the constituents of bitumen

    Has unlimited Shelf life (under standard godown conditions)

    The product is available in solid pastille form, packed in 20 kg bags

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    4

    5

    6

    7

    ent

    n - Alkanes iso - Alkanes

    n - Alkanes iso - Alkanes

    FT-hydrocarbon

    Bitumen Inherent Wax

    Comparison between bitumen wax

    and FT-hydrocarbon (SASOBIT)

    IRC, New Delhi 20.10.2014 5

    0

    1

    2

    3

    16

    20

    24

    28

    32

    36

    40

    44

    48

    52

    56

    60

    64

    68

    72

    76

    80

    84

    88

    92

    96

    100

    Carbon Number

    Pe

    r

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    How to use Sasobit?

    Add to bitumen at 130-150C

    Simple use paddle stirrer or circulation

    pump

    Mix for approx. 0.5 1 hour

    Percentage: 0.5 - 3% Sasobit by mass of

    IRC, New Delhi 20.10.2014 6

    ,properties

    Suitable / compatible with all types ofbitumen

    Does not have any phase separation / settling

    Has an unlimited shelf-life like a plainbitumen

    A movie clip

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    70

    80

    90

    100

    g

    Point,

    C

    Influence of Sasobit

    on Softening Point

    IRC, New Delhi 20.10.2014 7

    40

    50

    60

    0.0 1.0 2.0 3.0 4.0 5.0 6.0

    Percentage Sasobit in 80/100

    Soften

    i

    80/100 limits 60/70 limits 40/50 limits

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    70

    80

    90

    100

    nat25C,

    0,1

    mm

    Influence of Sasobit

    on needle penetration

    IRC, New Delhi 20.10.2014 8

    40

    50

    60

    0.0 1.0 2.0 3.0 4.0 5.0 6.0

    Percentage of Sasobit in 80/100 bitumen

    Penetrati

    60/70 limits 40/50 limits

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    Improved Fuel Resistance

    with Sasobit

    120

    160

    148

    m) 3% SasobitTM Modified Asphalt

    IRC, New Delhi 20.10.2014 10

    0

    40

    80

    0 4 8 10 15

    Number of Days

    4

    26

    59

    92

    40

    2010

    WeightLoss(g

    Conventional Asphalt

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    Mix and compaction workability

    IMPROVED WORKABILITY

    Mixing stage

    20C plus possible decrease inmixing temperature

    Compatibility & easy blending

    Reduced blending time

    Energy savings

    CONVENTIONAL ASPHALT

    SASOBIT MODIFIED ASPHALT

    Service To Mix/Pave To

    Extended Plasticity Range

    IRC, New Delhi 20.10.2014 11

    Placing and compaction Lower working temperatures

    or wider working window

    Reduced fumes

    Lower impact of weather

    Reduced roller compaction

    necessary

    Faster laying or paving

    Longer haulage

    Operational TemperatureRange

    10 oC 180oC100oC

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    Production benefits of

    WMA with SasobitProduction benefits:

    Lower production temperatures lead to less fumes, lower emissions

    Lower energy consumption can lead to lower overall costs

    Lower exposure of the bitumen to heat and thus a lower oxidation which could lead to a

    longer road lifetime

    900

    IRC, New Delhi 20.10.2014 12

    778

    609

    493

    435

    0

    100

    200

    300

    400

    500

    600

    700

    800

    AC 22 B S SMA 8 S

    G

    as

    consum

    ption

    [m

    /h]

    Low Temperature

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    The Effect of WMA (Sasobit) on

    emissions

    With Sasobit

    IRC, New Delhi 20.10.2014 13

    Without Sasobit

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    Sasobit

    IRC, New Delhi 20.10.2014 14

    ew case s u e

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    International Case studies

    Frankfurt airport in GermanyObjective: To pave the entire northern airstrip (4000 meters long and 60 m wide) without

    stopping any air traffic. (This meant airstrip could only be closed from 22h00 at night to 06h00)

    Thus: Work could only be carried out during the night and it had to be asphalt

    It had to be a warm mix asphalt due to the above constraints

    4cm SMA 0/11 S with PmB 45incl. 4% Sasobit + cellulose

    IRC, New Delhi 20.10.2014 15

    fibres

    8cm Asphalt binder 0/22S withPmB 25 incl 4% Sasobit +cellulose fibres

    24cm base course 0/32 CS withPmB 25 incl 4% Sasobit +cellulose fibres

    24 base course 0/32 CS withbitumen pen 30/45 incl 4%Sasobit + cellulose fibres

    existing gravel

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    The building contract stipulated a paving temperature of 125OC. The airport was

    paved in sections and the asphalt needed to be about 100OC immediately after

    paving.

    No workability problems were observed even at these low temperatures and theproject was completed with no incidents reported over the 300 night (1500 tons per

    night paved).

    Little or no fumes observed as seen in below picture

    International Case studies

    Frankfurt airport in Germany (contd.)

    IRC, New Delhi 20.10.2014 16

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    Indian development work

    CRRI evaluation of Sasobit

    Objective: Concluded to evaluate the effect of Sasobit on the overall

    properties of a 60/70 bitumen

    Sasobit was mixed at various concentrations from 2.5 to 4.0% of binder% The mix design was completed using the Marshall method and 3%

    Sasobit selected.

    IRC, New Delhi 20.10.2014 17

    Changes with Sasobitobserved in the bitumen.

    a) Mix compacted easily at 120OC

    b) Penetration of the bitumen decreased as expected

    c) Softening point increased significantly

    d) Ductility and elasticity decreased as expected

    e) Viscosity significantly decreased as expected.

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    Asphalt performance results with Sasobit at 3% addition and paved at

    120O

    C:a) No changes in Retained stability

    b) No changes in Tensile strength ratios

    Indian development work

    CRRI evaluation of Sasobit

    IRC, New Delhi 20.10.2014 18

    c o c anges n ynam c creep an a s g ncrease n a gue

    resistance

    d) Increase Rutting resistance as expected

    e) Emissions dramatically decreased overall, while in some case up to

    75% with the lower simulated paving temperatures

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    Objective: Effect of Sasobit on Viscosity and Rheology of Bituminous Binders

    Conclusions:

    Viscosity of Sasobit warm mix asphalt is higher at lower temperatures and reduces considerably

    at higher temperatures, which is desirable.

    It was observed that at 100oC the Sasobit increased the viscosity of the binder as its melting point

    Indian development work

    CRRI & IIT Roorkee

    IRC, New Delhi 20.10.2014 19

    up till 155oC.

    Other properties of bitumen are also found to be improving.

    Sasobit modified binder showed better Storage Modulus (G) and Loss Modulus (G) values

    between the temperature range of 40oC 88oC which concludes to the increased stiffness of the

    binder as well as better viscous response of the binder in that temperature range.

    Improved phase angle and complex modulus values were achieved after addition of Sasobit to the

    binder.

    It shows better resistance to the permanent deformation of the mix as compared to the mix

    prepared by neat VG 30 binder

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    Indian development work

    IIT-Guwahati (Mix Design)

    Objective: The study was completed to determine the effect of 1% Sasobit on

    modified binders:

    Modified binders used PMB 70 and CRMB 55 Various simulated paving temperatures used

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