Natural Bitumen Asphalt Grade

Gilsonite Asphalt Grade have been known since 1940 and it is the only mineral Asphalt Grade . The deposits contain 80 to 97 % asphalt content and there is reserved between 200 to 300 million tons of natural Bitumen. It has been used mainly for road construction and maintenance however oil well drilling fluid to prevent lost circulation.

Asphalt Grade Gilsonite Founder

It was originally medium gravity oils migrated into uplifted and intensively thrusted anticlines due to collision of natural asphalt with Muna block. Severe deformation eroded cap rocks of the reservoirs where oils came into.

Introduction of natural bitumen:

Natural Asphalt deposits are in petroleum areas. Mostly petroleum reservoirs exposed to surface. One of these important areas who mined since 1940 is the asphalt deposits of PUB-LTD mine.

Mining Natural Asphalt

Early exploitation and mining of natural asphalt occurred from 1940 to 1941 that produced 670 tons of natural asphalt in 1940.

Fluctuating during the years, and produced 8000 tons in 1945, 12,900 MT in 1949. In addition, it mostly used for asphalt.

Asphalt Grade as drilling additive:

For oil and gas drilling natural asphalt is using as variety of organic additives such as dispersing agents, retarders or fluid loss control additives.

Natural asphalt prevent interstitial water from filtering into the formation during cement placement, are generally polymer based.

The natural asphalt component appears to be particularly important to control fluid loss and to act as a shale inhibitor. 

Gilsonite In Road Asphalt

Mixture of natural bitumen into asphalt relates to a base stock composition comprising a blend of natural asphalt and a rubber latex residue.

The base stock may be used alone as a paving material or emulsified to form a natural asphalt emulsion having a variety of uses.Mixture of natural asphalt enforce asphalt against rutting and thickness of the asphalt with become thin.

  1. Have high bond capability due to resin effect to make the bitumen more waterproof.
  2. Improve stability for heavy load traffic
  3. Have high melting point making the asphalt is more resistant to plastic deformation in tropical temperature.
  4. More resistant to ultra violet exposure and to fatigue due to repeated loads.

Powder Gilsonite Asphalt Grade

This invention directed to asphalt cement formula, formed from petroleum asphalt, natural asphalt, reactive oil and elastomer. Elastomer has  gel content (+95%).

Mineral Bitumen Mixture In Asphalt

Asphalt cement toughened with powder gilsonite and thinned with reactive oil. Reactive oil is an oil that contains a high content of unsaturated fatty acids. By using a reactive oil, it would cure or react after usage of asphalt cement to highway. Thereby allowing for a lower viscosity uses by curing later to prevent rutting.

Natural asphalt preferably one having a melting or softening point near about 300° F. So softening and blending of that will more easier than petroleum asphalt at same temperature

How To Mix Natural Asphalt in Asphalt?

An Asphalt composition consisting essentially of 100 parts by weight of a petroleum asphalt from about 1 to about 10 parts by weight of a natural asphalt from about 1 to about 10 parts by weight of a thinning reactive oil comprising at least about a 60 percent unsaturated fatty acid content having from about 14 to 24 carbon atoms, and from about 1 to about 10 parts by weight of an elastomer.

Natural Asphalt Packing

Gilsonite lump and powder micronized packed in 500~1000kg jumbo bag.

Powder natural asphalt 30-400 mesh packed in 500~1000kg jumbo bag or pp paper 25 kg on pallets.

The bags are laminated & resistance against moisture.


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