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Bitumen

Fuel Company "Rusneftesnab" supplies petroleum products on the Russian Federation  and also bitumen. Supply of bitumen is carried out by road to Moscow and its neighboring area. JSC "Rusneftesnab" delivers bitumen by rail to the regions of the Russian Federation.

Our goal is to provide our consumers only with quality petroleum products in the shortest possible time in view of a rational pricing policy.

Asphalt (from the Latin. Bitumen - asphalt) is a solid or retinoid products, represents itself a mixture of hydrocarbons and nitrogen, oxygeniferas , sulfuriferas  and metal derivatives. Bitumen is not soluble in water, completely or partially soluble in benzene, chloroform, carbon disulfide and other organic solvents; density makes up 0,95-1,50 g / cm.

Buy bitumen you can contact our company by phone: 8-800-7000-800 (toll free from Russia) and 8-495-514-02-76. Price for bitumen, you can find in the relevant section of our site - the cost of production.

Natural bitumen is an integral part of fossil fuels. They include natural oil derivatives, produced by deformation of conservation of its deposits as a result of chemical and biochemical oxidation, such as asphalt, kerites, maltes and others. Mining is carried out mainly by quarry or shaft method  (tar sands).

Sale and delivery of oil products is carried out in Russia by road and rail. Delivery of dark fuel (bitumen) is carried out for industrial enterprises and organizations that use in the manufacture and consume fuel oil, diesel fuel, gasoline, bitumen and other petroleum products.

Artificial (technical) bitumen  is the residual products of oil refining, coal and shale. In terms of composition similar to the natural bitumen.

Oil bitumens are artificial, residual oil products, Which are solid or viscous, consisting of hydrocarbons and heteroatomic (oxygen, sulfur, nitrogen, metal-containing) compounds.

Composition of oil bitumen consists of the following groups of substances that differ in solubility:

  • Asphaltenes (the most high-molecular oil compounds), which are soluble in chloroform, carbon disulfide, are not soluble in alcohol, ether and acetone;
  • Asfaltogeneous acids are an  acid resinous substance, soluble in alcohol, chloroform, poorly soluble in gasoline;
  • Neutral resin are soluble in petroleum oils, benzene, ether, chloroform and produced by heating and acid treatment in the asphalt;
  • Petroleum oils;
  • Carbens are high-molecular substances produced in the result of consolidation of asphaltenes in the presence of sulfur, soluble in pyridine, carbon disulfide;
  • Karboids are substances which are not soluble in organic solvents.

Asphaltenes determine hardness and high softening point of bitumen, tar - its elasticity and cementing properties, oil - frost.

Petroleum bitumen  are is dispersed systems, in which a  dispersion agent is oil and resin, and the dispersed phase - asphalt. Depending on the degree of aggregation and peptization oil bitumen form various micellar systems, i.e. sols, sols-gels, and gels.

In industry bitumen is produced by: deep distillation of oil fractions from tar (residual bitumen); oxidation atmoshere of tar by oxygen, cracking residues or extracts from selective refining of oils and their mixtures (oxidized bitumen). Residual bitumen is soft low-melting products, while oxidized ones are flexible and heat-stable. Asphalt, obtained by oxidation of the cracking residues contain large amounts of carbenes and karboidov that violate the homogeneity of bitumen and reduce their cementing properties. Industry produces semi-hard, solid and liquid bitumen.

Shipment of bitumen is produced by rail directly from the factory-manufacturer. Supply of fuel is carried out by rail that is needed to supply  industrial enterprises and organizations that use in the manufacture and consume fuel oil, diesel fuel, gasoline, bitumen and other petroleum products.

Petroleum asphalts are solid, visco-plastic or liquid products of oil refining. The chemical composition of bitumenis a complex mixture of high hydrocarbons and their metallic derivatives of nitrogen, oxygen and sulfur, completely soluble in carbon disulfide.For researching bitumens they are divided into main groups of hydrocarbons (similar properties) - oils, resins, asphaltenes, asfaltogeneous acids and their anhydrides.

Oils are a mixture of cyclic hydrocarbons (mainly naphthenic series) light-yellow color which density is  less than 1 and molecular weight of 300 - 500; high content of oils in the bitumen gives them flexibility, fluidity. The number of oils in bitumen fluctuates within 45 - 60%.

Resins are visco-plastic dark brown material which density makes up less than 1 and a molecular weight is up to 1000. Resins are more complex composition of hydrocarbons, rather than oil. They consist mainly of oxygen heterocyclic compounds of neutral character and give a big bitumen viscosity and elasticity. The gum content 15,30%.

Asphaltenes and their modifications (carbens and karboidy) are solid, infusible material which  density is more than 1 and molecular weight makes up 1000 - 5000 and more. This group of hydrocarbons is an essential part of the bitumen. An increased content of asphaltenes in bitumen determines its high viscosity and temperature stability. The total content of asphaltenes in various bitumen is 5 - 30% or more.

Carbene and carboids are  relatively rare included in bitumen in small quantities (1 - 2%) and enhances fragility of bitumen.

Asphalt acids and their anhydrides are brownish resinous substance which density is more than 1. They belong to the group polinaftenous acids and may be not only viscous but also solid. Asfaltogeneous acids are surface-active part of bitumen and enhances its adhesion to the surface of mineral fillers. Their content in petroleum bitumen is about 1%.

The above group of hydrocarbons bitumen form a complex dispersion system, i.e. colloidal solution in which the liquid medium - a solution of resins and oils in the oils and solid phase is represented by asphaltene on the surface which adsorbed asfaltogenovye acid. Oils, resins and asphaltenes are part of the bitumen in different ratios, and thus determine their structure. Depending on the quantitative content of oils, resins and asphaltenes (as well as the heating temperature) colloidal structure of bitumen - "gel", "sol", "zolgel" undergo a change of type "sol" to type "gel". The structure of the "gel" - typical of solid bitumen at a temperature of 20 - 25 ° C and is usually determined by a high content of asphaltenes. The structure of the "sol" is inherent in bitumen liquid consistency with a high content of resins and oils.

The most important properties of bitumen, which characterize their quality, arethe following: strength, ductility, softening temperature and fragility, in addition, it should be noted the high adhesion, which is linked to the ability to hook into a monolith of bitumen mineral grain fillers, they can also give hydrophobic properties of the materials treated with bitumen.
The main characteristic of the structural and mechanical properties of bitumen is the viscosity, which depends mainly on temperature and composition of the group. Viscosity - resistance of the internal layers of bitumen displacement relative to each other. For many, the viscosity of bitumen is fickle and decreases with increasing shear stress or velocity gradient of deformation. With increasing temperature, the viscosity decreases with the lowering of its viscosity increases rapidly, and at subzero temperatures bitumen becomes brittle. To measure the structural viscosity using various instruments for determining viscosity in absolute units (Pa-s), or express it in arbitrary units.
To characterize the viscosity, or more precisely, the inverse of viscosity, ie, the yield of bitumen, was adopted conditional indicator - the depth of penetration of the needle in the asphalt (penetration). The depth of penetration of a needle into the bitumen to define the device - penetrometer under the action of the needle cargo weighing 100 g for 5 s at 25 ° C or 0 ° C with 200 g of cargo within 60 pp. Penetration of solid or viscous bitumen is expressed in units (degrees) equal to 0.1 mm penetration of a needle into the bitumen. The higher the viscosity, the lower the penetration of a needle into the bitumen.

Plasticity is an important feature of bitumen. It increases with increasing oil content, the duration of load and temperature rise. Plastic properties of solid and viscous bitumen conventionally characterized stretchability (ductile) - the ability to stretch a thin filaments under constant external force. Tensile properties determined on a special device - duktilometre at strain rate of the sample of bitumen in the form of "Eight" 5 cm / min, test temperature 25 and 0 ° C. Indicator is a stretch length of the filament at break of the sample, expressed in centimeters. Plastic properties of bitumen depend on temperature, group composition and structure. Thus, with increasing content of resin and asphaltene plasticity at constant temperature of bitumen increases.

An essential characteristic of the properties of bitumen is also the softening temperature, determined on the device "ring and ball" ( "K and W). Softening point of bitumen, expressed in degrees Celsius, corresponds to the temperature of the water bath in a glass apparatus at a time when the bitumen is available in a brass ring (diameter 16.0 mm), deformed under the influence of a metal ball weighing 3.5 grams and the gradual heating of the water at speeds 5 ° C per minute touch the bottom shelf of the stand. Lower shelf stand device is a standard distance from the ring, equal to 25 mm. Softening viscous and solid bitumens varies from 20 to 95 ° C. To characterize the thermal properties of bitumen than the softening temperature determines the temperature brittleness.

Temperature brittleness of bitumen to determine the special device Fraasa. For this purpose, the subject applied a thin layer of bitumen pa brass plate, which, together with bitumen can be cooled and bend with the device available on the device. Over the temperature brittleness take the temperature at which the furnace bent layer of bitumen produced the first crack. Brittleness temperature, for example, road bitumen can be from -20 to +5 ° C. Obviously, the lower the temperature brittleness of bitumen, the greater its frost resistance and higher quality.

Flashpoint - the temperature at which the pair formed by heating the bitumen in the open crucible, ignited by the flame presents made. Flashpoint shall be determined on a standard instrument and note on the thermometer at the time of the outbreak of bitumen fumes. Flash solid and viscous bitumen usually above 200 ° C, and characterizes the degree of flammability of bitumen as it is heated.

Essential feature of bitumen is their high adhesion - adhesion to the surface of various mineral and organic materials. To determine the adhesion, there are many methods and devices. One of them is a visual method by which the degree of adhesion of bitumen to the surface of mineral materials evaluated on a five-point scale. Excellent adhesion of bitumen - 5 points - in the case when the film of bitumen on the surface of gravel or crushed stone is fully preserved after boiling in distilled water. Very poor adhesion, estimated at one point, when the film of bitumen after boiling completely shifted from the mineral grains and floats to the surface of water.

Depending on the performance of major properties, especially viscosity, plasticity, and softening temperature, oil bitumen can be divided into grade:

  • For road construction on GOST contains five stamps from BND (bitumen road) -200/300 to BND-40/60, where the numbers indicate decimals are allowed in this grade limits of penetration rates at 25 ° C, and four brands of BN 200/300 to BN-60/90.
  • For construction work according to GOST has three brands, denoted "BN" - bitumen: BN-50/50, BN-70/30 and BN-90/10, where the numbers correspond to the numerator of the fraction of softening temperature indicator for "K and W" (ring and ball), and the denominator - indicate the average limits of penetration at 25 ° C.
  • For roofing work according to GOST provides the following brands: BNK (bitumen roofing) -45/180, BNK-90/40 and 90/30, as well as BNK-45/190. In this case, the numerator corresponds to the average indicators of the softening temperature of "K and W, and the denominator - the average penetration rates at 25 ° C.

In solid bitumens and viscoplastic these brands are liquid bitumen. Liquid bitumen at room temperature have little strength, ie, liquid consistency, and are used in the construction of a cold or slightly heated (to 50 - 60 ° C) condition.

Because of evaporation of volatile fractions and oxidation, liquid bitumen gradually thicken. Depending on the rate of thickening liquid petroleum bitumen produced two classes - the deepening at an average speed (class C) and medlennogusteyuschie (class of MG). Liquid bitumen class SG manufactured by dilution of normal, viscous bitumen light of kerosene-type diluent. To receive bitumen class MG thinners used coal or petroleum origin (oil, fuel oil, etc.). Depending on the viscosity of each of the indicators of liquid bitumen road classes SG and MG are divided into three brands: these asphalts must meet the requirements of GOST.

Getting oil bitumen

Petroleum asphalts are refineries of different crude oils, differing in chemical composition and properties.

Oil on plants subjected to fractional distillation to produce lighter products (gasoline, naphtha, kerosene), lubricating oils and other petroleum products. Oil remains after the selection of lighter mass fractions - tar cracking - then use as raw materials for petroleum bitumen specified properties. At present, oil bitumen is obtained by atmospheric-vacuum distillation of crude oil (residual bitumen), the oxidation of oil residues (oxidized bitumen) and the mixing of residues resulting from the distillation of crude oil (blended bitumen).

Residual asphalts are products of low viscosity and are usually subjected to oxidation.
Oxidized bitumen is produced by blowing air oil residues (tar) on oxidative special installation to a given viscosity. The interaction of oxygen with the tar in the process of purging a reaction formation of high-molecular components of oxidized bitumen and increase its viscosity. Recently mastered the method of continuous oxidation of bitumen. Oil remains at a temperature of about -210 ° C enter the reactor, where with the help of special devices (dispersant) is sucked in air and is distributed in the oxidized product. In this technology, along with the intensification of the oxidation process improves the quality of the oxidized bitumen.

Mixed (blended) bitumen are mainly produced by mixing bitumen deasphalting (residual product after processing tar liquid propane) with oil distillates.

Petroleum bitumen, as solid or visco-plastic and liquid, are widely used in construction. They are used for the device pavements, coatings, airfields, unit flat roofs, irrigation canals, the production of waterproofing and roofing materials in the paint and chemical industries.