Gilsonite prevent rutting,cracking,shoving and deforming

Using of Gilsonite in heavy traffic area like junction or bus station

Gilsonite using as additive in paving on special location of roads like bus station or signal points and junction. Due curing of pavement because of cold or high temperature, weight of trucks and cars, sun,rain,snow road construction companies are looking for new technology and material to use to improve crack and deformation and all above problem. 

Atdm supplying gilsonite in the medium course and fine size and playing as resistance against fatigue and deformation. All tests showing significant improvement compared other additives.

Gilsonite in permanent deformation

Gilsonite is using to increase the resistance to permanent deformation and prevent shoving and rutting also cracking during cold temperature.Gilsonite using as road pavement additives in hot mix. Gilsonite and modified Gilsonite are adding directly at the production site of the asphalt and bitumen mixing plant.

To use asphalt in road construction in cold weather just use our gilsonite and no need to use any special bitumen! Just bitumen 50-70 is more than enough!

Gilsonite as bitumen binder modifer

Gilsonite is used as a bitumen binder modifier with various properties of binder that is modified only by Gilsonite are common, we investigate the effect of combining bitumen and Gilsonite in the same base binder. Adding 13~14% gilsonite increase performance of asphalt. Also, the viscosity of modified binders by Gilsonite is always high. We are suggesting iran Gilsonite can be used as an alternative modifier to reduce the cost of asphalt mixture production and compaction in the field.

Detail of Gilsonite mixture in asphalt

It has been discovered that asphalt cement can be toughened with Gilsonite and thinned with a reactive oil. Reactive oil is an oil that contains a high content of unsaturated fatty acids. By using a reactive oil, the oil would cure or react after application of the asphalt cement to the highway, thereby allowing for a lower viscosity application by curing later to prevent rutting.

Gilsonite is preferably one having a melting or softening point near about 300° F. so that it is more easily softened and blended with the petroleum asphalt at such temperatures.

How to mix Gilsonite in asphalt:

Gilsonite should be added slowly at the vortex. Provisions should be made to recirculate the hot bitumen through recirculation piping. The most important item is that the minimum temperature should be about 170 to 175° C. Anything significantly less than this will extend mixing time. For typical (5-10%) substitution concentrations, 2-4 hours of mixing after addition is completed should be sufficient. For master batch concentrations (over 10% mineral bitumen) recirculation overnight is preferred.

Specification of Gilsonite 

TEST METHOD

RESULT

TEST

NO

ASTM-D3174

5

ASH CONTENT,WT%

1

ASTM-D3173

1%

MOISTURE CONTENT,WT%

2

ASTM-D3175

63

VOLATILE MATTER,WT%

3

ASTM-D4

80

SOLUBILITY IS CS2,WT%

5

ASTM-D3289

1.11

SPECIFIC GRAVITY @25 C

6

ASTM-D3279

79

NORMAL HEPTHAN INSOLUBLES,WT%

7

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Black

COLOR IS MASS

8

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Black

COLOR IN STREAK OR POWDER

9

ASTM-D36

185

SOFTENING POINT,C

10

ASTM-D5

0

PENETRATION @25C

11

ELEMENT ANALYSIS

ASTM-D5291

84

CARBON,WT%

1

ASTM-D5291

7.1

HYDROGEN,WT%

2

ASTM-D5291

3.67

NITROGEN,WT%

3

ASTM-D5291

3.1

OXYGEN,WT%

4

LECO(S)ANALYZER

2

SULPHURE,WT%

5

Our approvals

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