BITUMEN GRADES:

Bitumen 30/40

Bitumen 40/50

Bitumen 60/70

Bitumen 80/100

Bitumen 85/100

Bitumen 100/120

Bitumen R90/15

Bitumen MC-250

Bitumen R85/25

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Packing - New Drums

Typical Uses / Applications:

The uses of bitumen are numerous. The chief one in most countries is for road construction. It is also used for surfacing airfield runways and taxi tracks, hydraulic applications such as canal lining, river bank protection, dam construction and sea defenses. There are also numerous industrial applications like roofing felt manufacture, printing inks, electrical cable / Junction boxes, mastic for roofing of terraces, duplex paper manufacture etc.

Quantity:

Min. 500 M.T.

Packing:

Can be New Drums or Reconditioned Drums

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GILSONITE:

Packing:

25 KG plastic bags or as per customer request

Typical Uses / Applications:

Asphalt Modifier Inks & paints Cement Drilling Fluids Bore-Plate Resin Shale Stabilizer Carbonaceous Foundry Sand Additive

GILSONITE

Asphalt Modifier

The use of modifiers to improve the performance of bituminous road paving materials is increasing worldwide. Gilsonite is used by asphalt producers, road paving engineers and paving contractors who are concerned with PG specifications, high performance and cost effectiveness. Gilsonite, long known as a bitumen reinforcer and hardening agent, also offers a unique combination of high performance and economy for high stress paving applications.

The main benefit of Gilsonite is in producing road pavement mixes of higher stability than conventional ones. Gilsonite, a unique, natural hydrocarbon, high in asphaltenes and nitrogen compounds, is a granular solid that is fully compatible with bitumen. It can be melted into hot bitumen, or it can be added during hot mix manufacture. In either case, Gilsonite dissolves easily in bitumen and achieves a uniform, easily workable hot mix.

The stability of Gilsonite-fortified pavements makes them more resistant to deformation problems, such as rutting and shoving, and increases the pavement's load carrying ability. In addition, laboratory test and field results show that increased deformation resistance can be obtained while the pavement retains much of its original ductility and ability to resist low temperature cracking. Other positive benefits include increased resistance to water stripping and aging.

Inks & paints

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Gilsonite Resin is used as a partial replacement for hydrocarbon resin, alkyd resin, rosin modified hydrocarbon resin, phenolic modified rosin resins, oxidized asphalt, and metal resinates.

In Heatset inks it is primarily used as a replacement for hydrocarbon resin. It has its best application in the carbon black grinding vehicles where it can replace up to ½ of the hydrocarbon resin and up to ¼ of the alkyd resin. It also can be used in the gelled let down varnishes where it can replace up to ¼ of the rosin modified hydrocarbon resin and up to ¼ of the phenolic modified rosin resins. Unlike hydrocarbon resins, Gilsonite Resin has functionality and will react with aluminum gelling agents.

In News ink formulas Gilsonite Resin is used as a partial replacement for Gilsonite Resin or oxidized asphalt. Gilsonite Resin has a solution viscosity that is lower than GilsoniteResin ; so more resin can be added to the formula at the same tack and viscosity. The increased resin loading will give a News ink better rub-off properties.

In Gravure inks Gilsonite Resin is used as a substitute for up to ½ of the metal Resinate in the formula. Gilsonite Resin  develops the carbon black more efficiently than other wetting agents. Because of this higher structure carbon blacks can be used while still maintaining the gloss and adhesion characteristics that were attained using low structure carbon black. The use of high structure carbon black will yield ink with a bluer print tone, without the addition of expensive alkali blue or iron blue toners.

Special grades of Gilsonite called Selects are also standard ingredients in black ink formulations and are used as additives in asphaltic paints and varnishes.

Cement

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Gilsonite Resin is widely and effectively used to prevent or cure loss of slurry circulation while cementing oil and gas wells. The low specific gravity of (1.05) and sealing characteristics of Gilsonite provides qualities that make it effective against loss of the slurry to permeable zones, natural and induced fractures, and caverns. Since Gilsonite was first introduced to the industry in 1957, more that 1 billion sacks of Gilsonite have been used in cementing operations. As stated by Smith and Grant, the properties of Gilsonite provide the following benefits in lost circulation applications.

Provides low slurry density without addition of large water volumes. Compressive strengths are higher due to addition of solid particles rather than water.

Compatible with other additives since the solid hydrocarbon is chemically inert.

Protects against premature slurry dehydration since Gilsonite is impermeable and nonporous.

Resists the effects of corrosive waters as well as acidic and alkaline solutions.

Is strong enough to withstand moderate squeeze pressures, but soft enough to permit pressure deformation, thus providing an effective seal. This gives Gilsonite Resin an advantage over ground coal, which does not compress and does not have pressure deformation characteristics.

Effective to bottomhole temperatures of 350°F.

Resistant to dissolution by crude oils.

Scours uncirculated drilling mud and filter cake from borehole walls during slurry placement.

Six cases were cited in the paper which illustrated the before and after effects of the use of Gilsonite in cementing operations. Successful squeeze jobs, prevention of cement fallback, and full or almost full fillup during a cement operation were obtained. These cases cited success in squeeze jobs after 15 unsuccessful attempts, successful cementing in shallow wells with severe lost circulation, reestablishment of lost circulation in wells used for a waterflooding program, squeezing off corrosive damage in oil casing, and successfully cementing in severely pressured depleted wells.

There are three conclusions regarding the use of Gilsonite in cementing operations:

Gilsonite slurries provide effective and economical prevention and cure for loss of cement circulation.

Gilsonite may be used in any type of cementing system, with the optimum range being between 10 to 25 lb/sack.

Gilsonite slurries have been reported to bridge in the casing when using bottom cementing plugs. While situations may vary from well to well, this should be considered by the user when high Gilsonite concentrations are being planned.

Drilling Fluids

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For many years, Gilsonite has been used in the oil field as an additive in drilling fluids. Gilsonite, in various grades and formulations, has been used to combat borehole instability problems, provide lubricity, especially in highly deviated holes, and more recently as a bridging agent to combat differential pressure sticking and provide a low invasion coring fluid. It has been well documented that appropriately formulated Gilsonite products can minimize hole collapse in formations containing water-sensitive, sloughing shales and reduce stuck pipe problems by forming a thin wall cake and an inter-matrix filter cake.

The causes of borehole instability are numerous. The reasons for the instability can be mechanical, chemical or physical in nature. Mechanical problems include borehole erosion by high annular velocities, adverse hydraulic stresses due to high annular pressures, hole collapse from high swab and surge pressures due to excessive wall cake, and stress erosion due to drill string movement. Chemical alteration problems include hydration, dispersion, and disintegration of shales due to the interaction of clays with the mud filtrate. Physical instability problems include the spalling and rock bursts of shales due to abnormal pressure or overpressure relationships of hydrostatic and formation pressures. Fracture and slippage along bedding planes of hard, brittle shales and the collapse of fractured shales above deviated holes are also physical problems encountered while drilling troublesome shales. This problem also occurs in non-deviated holes while drilling over-pressured shales.

Borehole instability problems are often referred to as sloughing, heaving, spalling, or over-pressured shales, mud balls, mud rings, and many other descriptive names. There are many solutions to these problems. The use of additives to inhibit or partially inhibit the swelling of shales has been well documented. Gilsonite products play a key role in addressing these problems.

Gilsonite products are currently being widely used in water based, oil based, and synthetic based mud systems worldwide. Blended Gilsonite has proved to be very effective in all water-based systems, with the flagship product in this line being Bore-Plate(R) Shale Stabilizer.

Bore-Plate Resin Shale Stabilizer

Bore-Plate Shale Stabilizer is a proven, unique composition of Gilsonite grades and dispersants, blended to provide optimum performance in water based drilling fluids. Bore-Plate is effective in low and high-temperature wells, stable in the presence of mud contaminants, and tolerant to additions of diesel oil. It can replace or complement sulphonated asphalts at a much lower cost, while providing additional properties that sulphonated asphalts lack.

Carbonaceous Foundry Sand Additive:

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Carbonaceous materials are frequently added to sand molds used to make grey iron or pig iron castings. The function of these additives is to reduce the number of imperfections that occur in the casting process and to release the casting from the sand mold more easily.

Currently, there are several materials, including Gilsonite, that are used as a carbonaceous additive in the foundry process. While there are several theories as to the mechanics of how these additives work, it is agreed that their major beneficial effects on the sand mold are: (1) increased green strength; (2) increased dry strength; (3) decreased hot strength; (4) decreased permeability; and (5) increased mold hardness.

Foundry research and laboratory testing demonstrates that Gilsonite, when used at lower levels than other additives, equals or outperforms all other additive materials. For example, studies conclude that Gilsonite is critical to enhance the "casting peel" during shakeout.

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