SASOBIT - HMA, WMA, RAP Additive.pdf


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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?


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)


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


,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


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


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

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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

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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

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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

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Without Sasobit


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Sasobit

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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

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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.)

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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.

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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


CRRI evaluation of Sasobit

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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


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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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 to determine optimum performance

IRC, New Delhi 20.10.2014 20

esu s:

a) Up to 30 degrees below normal practice all design parameter requirements met

b) Higher bulk densities and Marshall stability observed

c) As expected the lower the temperature the lower the bulk density and Marshall

stability, but this still met specifications.d) The lower the paving temperatures the higher the air voids but they still met

requirements and specifications.


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IIT-Bombay (RAP with Sasobit)

Objectives of the study:

To evaluate the suitability of recycled mix containing high percentage of RAP

using Sasobit Wax (Organic paraffin wax) as a rejuvenating agent. To determine the maximum percentage of Reclaimed Asphalt Pavement (RAP)

that can be incorporate in recycled mix using Sasobit Wax without compromisingin the structural performance of the mix

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Performance evaluation and comparison of recycled WMA and virgin HMA mix interms of rutting, fatigue with the help of IRC: 37-2001 distress models andmoisture susceptibility by Indirect Tensile Strength test.

Amongst the Conclusions:According to this study 62% RAP can easily be incorporate with the help of Sasobit

wax in recycled asphalt mix without compromising in structural performance of

pavement


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Cost Comparison

Cost Comparison of Sasobit Modified Bitumen Vs other Modified and non-modified bitumen options

Bitumen VG-30(PEN 60/70)

Bitumen VG-40 CRMB 60 PMB 40Bitumen withSASOBIT 1%

Bitumen withSASOBIT 2%

Bitumen with WMAChemical additive

0.4%

Estimated trends Estimated trends Estimated trends Estimated trends Estimated trends Estimated trends Estimated trends

Process Parameters

Process temp (Deg C) 150-160 150-160 170-180 180-190 125-135 125-135 125-135Mixing Time (Hours) - NA 5 Hours 12 Hours 0.5-1 hour 0.5-1 hour 0.5-1 hour

Shelf LifeUNLIMITED shelf life UNLIMITED shelf life Limited shelf li fe Limited shelf life

UNLIMITED shelflife

UNLIMITED shelflife

Very limited shelflife

Equipment Type -May be Oxidised / blended

with additivesNormal Mixing /

AggitatorHigh Shear Mill

NeededNormal Mixing /

AgitatorNormal Mixing /

AggitatorNormal Mixing /

Aggitator

Properties

Penetration at 25C,58.5 35 min 30-50 30-50 50.6 34.5 58.5

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. , , .

Softening Point,(R & B)C 51.1 50 min 60 min 60 min 60 65.9 51.1

Elastic Recovery at 15C% - NA 60 min 60 min NA NA NA

Viscosity @ 150C, cP 350 NA 500-900 500-900 250 200 325

Viscosity @ 135C, cP 350 (min) 400 (min) NA NA NA NA NA

Viscosity @ 130C, cP 900 NA NA NA 725 550 675

Viscosity @ 90C, cP 16325 NA NA NA 11325 7554 10225

Cost (Approx INR / Kg) 57.07 59.00 59.16 63.00 59.37 61.74 58.40

Note: 1.) Values shown above are only for comparative analysis and does not constitute a final reported values

2.) With above table we do not claim any product to be good or bad, the table only indicates scope of respective product application and is only for comparative analysis

3.) All the above data have been collected based upon market sources, internet search and the research papers (Global + Indian) in hand

*It may please be noted that the above cost benefit analysis doesn't take into account the several intangible performance benefits associated with Sasobit. For an overviewof the same a separate sheet is attached for reference purpose.


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Simply hard to make an impression

Highly durable asphalt surfaces

IRC, New Delhi 20.10.2014 23

Earlier opening to traffic

Simply simpler

Improved workability


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Simply less

Reduced temperatures

Sim l use it a ain

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Recycling

Simply flexible

Rubber modification using Sasobit


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Promoted & Distributed by:

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Your local contacts:

Contact Person Mobile No. E-mail ID

Mr. Rohit Chopra 0 98102 13639 [email protected]

Mr. Praveen Dubey 0 95600 16875 [email protected]. Gaurav Verma 0 93124 39317 [email protected]


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Thank youfor our

attention

Date post:	28-Feb-2018
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SASOBIT - HMA, WMA, RAP Additive.pdf

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