Bitumen

Typical solvents include Naptha, gasoline and kerosene, white spirit etc. The type of solvent controls the curing time while the amount determines the viscosity of the Cutback Bitumen.

Petro -Chemical Division

This Division handles all Petroleum based products, refined from Hydro-carbon cracking with special attention to Bitumen.

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To Provide Efficient and Cost Effective Products and Services.

Cutback Bitumen (Medium& Rapid)

Cutback Bitumen ( Liquid  Bitumen ) is Bitumen that is dissolved in a solvent . Typical solvents include Naptha, gasoline and kerosene, white spirit etc. The type of solvent controls the curing time  while the amount determines  the viscosity of the Cutback Bitumen.

The advantage Cutbacks have over Emulsions is a much higher residual Bitumen percent, typically over 80% compares with over 40-65% for Bitumen emulsions. The result is more Bitumen left on the roadway after curing, for the same volume of binder applied.

Bitumen Benzene International Singapore >> Video


Cutback Classification

Cutbacks are divided into two classifications, Rapid-Curing (RC) and Medium-Curing (MC) depending on the solvent used. They are further defined by a number which indicates the minimum kinematic viscosity (fluidity) of the cutback.

Grades & Properties

  Grade

  Curing Speed

  Viscosity 

   Penetration of Residue

MC 30

 Medium

 30-60

 120- 150

MC 70

 Medium

 70-140

 120 -150

MC 250

 Medium

 250- 500

 120 -150

MC 800        

 Medium

 800- 1600

 120- 150

MC 3000

 Medium

 3000- 6000

 120- 150

RC 70

 Rapid

 70-140

   80- 120

RC 250

 Rapid

 250-500

   80- 120

RC 800

 Rapid

 800- 1600

   80- 120

RC 3000

 Rapid

 3000- 6000

   80- 120

* Kinematic Viscosity  at 140 deg F ( 60 deg C), in Centistokes , Penetration of Residue at 77 deg F (25 deg C) , 100 grams, 5 seconds.

Application

Cutback bitumen’s suitable for primer sealing can also be used in the manufacture ofpre-mix asphalt, which is used in patch repairs.Cutback bitumen’s are used extensively in sprayed sealingapplications, particularly in cooler weather where theyprovide improved initial stone retention due to their lower viscosity. Typically, a single application of the appropriate cutback bitumen is sprayed onto the primed pavement ontowhich aggregate is laid.

 SPECIFICATION FOR MEDIUM CURING CUT BACK BITUMEN

PROPERTY

RANGE

STANDARD

BITUMEN
MC 30

BITUMEN
MC 70

BITUMEN
MC 3000

ASTM / AASHTO

Kinematic 1 viscosity @ 60°C,e  St

30/60

70/140

3000/50000

ASTM D1270 /AASHTOT201

Flash Point ( Tag Open- Cup), ° C

38

38

36

ASTM D1310 / AASHTO T79

Distillation Test°@360 °C

-
-
-
-

Residue from distillation to 360 °C, Percent volume by different

50%

55%

80%

ASTM D402 / AASHTO T55

Test on residue from distillation

-
-
-
-

Viscosity at 60° C

300-1200

300-1200

300-1200

ASTM D2170 /AASHTOT201

Penetration at 25 ° C, 100g, 5 Sec

120/150

120/150

120/150

ASTM D5 / AASHTO T49

Ductility 3 at 25 ° C

>100

>100

>100

ASTM D113 / AASHTO T51

Solubility in trichloroethylene

99.00%

99.00%

99.00%

ASTM D2402 / AAHTO T44

Water, Percent Volume 

0.20%

0.20%

0.20%

ASTM D95 / AASHTO T55

 

 SPECIFICATION FOR RAPID CURING CUTBACK BITUMEN

PROPERTY

GRADE

STANDARD

RC-30

RC-70

RC-250

RC-800

RC-3000

METHOD

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Flash point(open tag)deg C

-

-

-

-

-

27

-

27

-

27

ASTM D3143

Kinematic Viscosity at 60decC (mm 2/3)

30

60

70

140

250

500

800

1600

3000

6000

ASTM D2170

Distillate to 360 dec C

ASTM 402

to 190 dec C

15

-

10

-

-

-

-

-

-

-

to 225 dec C

55

-

50

-

35

-

15

-

-

-

to 260 dec C

75

-

70

-

60

-

45

-

25

-

to 315 dec C

90

-

85

-

80

-

75

-

70

-

Residue from Distillation

50

-

55

-

65

-

75

-

80

-

-

to360dec C, Volume % by diffrence test on residue from distillation

-
-
-
-
-
-
-
-
-
-
-

Penetration @25deg C,100g 5s, (0.1 mm)

80

120

80

120

80

120

80

120

80

120

ASTM D5

Ductility@25decC

100

-

100

-

100

-

100

-

100

-

ASTM D113

Solubility in trichloroethylene

99

-

99

-

99

-

99

-

99

-

ASTM D2042

Water by volume

-

0.2

-

0.2

-

0.2

-

0.2

-

0.2

ASTM D95

 Packing
Standard Seaworthy Exportable Packing  in200 Kg  Reconditioned Drums  
Palletizing is required for  Cutback Bitumen & Emulsions  -200kg drums shall be secured as 4 drums per pallet 

Steel Drum Sizes
Drum Size      200 kg Drum
Height             980mm
Diameter         520 – 550mm
Thickness       0.6 – 0.8mm

Net Packing 

Weight  per  20 Foot Container

200 Kg  

In Metric Tonnes 

Per Drum

No of Drums

Net Weight-Palletized

16.00 Mt  (+/- 3%)

200kgs (+/- 3kgs)

80

Gross Weight-Palletized

17.40 Mt  (+/- 3%)

215kgs (+/- 3kgs)

20

 

DIFFERENT SYSTEMS OF ROAD CONSTRUCTION &ROAD MAINTENANCE 

SYSTEMS

DESCRIPTION & USES

RECOMMENDED PRODUCT

Surface Dressing

An application of binder on the road surface by a bitumen distributor followed by a covering of aggregates/chippings spread by a hopper gritter. Can be a single or double layer surface dressing

Emulsion  : RS-3K
Cut Back  : MC -3000

Prime Coating

An application of binder on a granular base to prepare for an asphalt surfacing .Normally a slow setting emulsion or cutback is used for better penetration purposes to seal off the road base. The rate of application can vary from 0.4-1.4 liter/m2

Emulsion: SS-IK
Cut back  : MC-30
MC -70

Tack Coating

A very light application of binder –hand or machine sprayed –to ensure bonding between the existing layer and the new overlay. The rate of application is normally between 0.25-0.7 liter/m2,depending on the surface being sprayed

Emulsion:K1-40
: RS-1K
: RS-2K

Semi –Grouting /Penetration Macadam

An application of hot binder on a compacted layer of coarse aggregate

Emulsion : RS-3K
: MC-3000
Other       : Bitumen

Slurry Sealing

A maintenance technique where specially tailored emulsion ,aggregates ,water, and /or mineral filler is mixed  in an on-site distributor and spread on an existing road surface at a thickness of 3-6 mm .It is both a preventive and corrective maintenance method for sealing of surface cracks, water –proofing asphalt surfaces and stopping oxidation

Emulsion  : ALFA/SS

Fog Sealing /Mist Spraying

It is similar to tack coating in that is a very light application of diluted emulsion for renewal/rejuvenation of old asphalt surfaces. The emulsion is usually diluted to a concentration of about 25-30% binder and applied at a rate of 0.3-0.8 liter/m2

Emulsion  : K1-40
: SS-1K
: ALFA

Dust Binding

A light application of 0.5-2.0 liter/m2 using diluted bitumen emulsion for dust control on unpaved roads

Emulsion  : K1-40
: SS-1K