Natural bitumen is a petroleum bitumen that is oxidized asphalt formed due to the long-term compaction of the earth's crust and its gradual changes in contact with air and water. It exists in a natural way, and certain parts of the mineral material are often mixed together.

According to the different formation environment, it can be divided into stone asphalt, marine asphalt and underwater asphalt. Stone bitumen is a natural bitumen formed by the accumulation of petroleum in the earth's crust, which is solidified by long-term transpiration in rocks and cracks.

Natural bitumen is also called ground bitumen or mineral bitumen. Petroleum products. Oil and oil enter the soil, where the light fractions are transpired and then oxidized by the sun in the air with oxygen, which then aggregates into deposits of bitumen.

It is mainly composed of colloids such as asphalt and resin, as well as a few minerals such as metals and non-metals.

Natural bitumen states:

Bitumen refers to a flammable, viscous liquid or solid hydrocarbon mixture dissolved in sulfur carbon, including petroleum products, bitumen, mineral paraffin, and bitumen. Natural bitumen is solid or semi-solid bitumen, mineral paraffin and natural bitumen.

[Composition and structure] The composition of natural asphalt is significantly different, including C80-88%, H9-11%, N0 5.1.4%, S and O5 9%11. Mineral paraffin is mainly composed of cell isomers containing C84-86.15% and H8. The oxidized asphalt total of 5.10% shall not exceed 1.5.2%. Asphalt rock is divided into hard asphalt, brittle asphalt and asphalt. The chemical composition of solid asphalt is mainly composed of hydrocarbons and carbon, with total carbon of 85.88%, solid carbon of 10.20%, H13 of 71-15.30%, S0.3-1.5 % nitrogen. 0-2.8%. Almost no volatile substances.

[Physical and chemical properties] Asphalt is dark brown or black viscous solid or semi-solid. It becomes soft when heated, and becomes thicker liquid or solid after cooling. It consists of the slow distillation of petroleum close to the Earth's surface. Asphalt hardness is 0.5-5 and density is -1-1.2g/cm3. The softening temperature is above 100 °C, easily soluble in organic solvents such as pine oil, chloroform, sulfur carbon, etc., but insoluble in benzene and ethanol. Mineral white wax is an alkaline white wax solid asphalt, generally yellow, gray-green and brown. It is similar to beeswax, the density is less than 1.0g/cm3, and it contains many white wax and needle wax. Solid pitch has a coal-like appearance with a dull sheen and brown streaks. The softening temperature of solid asphalt is as high as 133-250°C, it is brittle, and the density is between 1.00-1.03g/cm3. Good stability, acid and alkali resistance, good electrical insulation. Coarse asphalt is hard, brittle, insoluble, has a high melting point, and has shell-like and serrated cracks. The density of brittle asphalt is 1.15-1.20g/cm3. Bitumen is also called pure bitumen and is between hard and brittle bitumen. It is heavier and harder to melt than stable bitumen, but lighter and easier to melt than brittle bitumen. Asphalt density is 1.10-1.15g/cm3.

[Function and application] Natural asphalt is mainly used for waterproof materials such as construction engineering, ruby production, road laying, ground laying, water tank, reservoir laying, etc. In addition to extracting natural asphalt, asphalt with a bitumen content exceeding 3% is also excavated abroad and use. Over 6.5% when laying the floor directly. When laying about 3-6% of the journey and soil in the pawn shop, pure bitumen should be properly added to ensure the required cement strength. Asphalt has excellent insulating properties and can be used to make refrigerators and battery cases. Asphalt and paraffin are mixed together as insulating materials for electrical wires. In the chemical industry, asphalt is used as a material for rubber, paints, coatings, inks and refined chemical products. Regarding the heat treatment of solid pitch, 90% of primary pitch is produced with carbon content, and 0.3% of ash is used to produce foundry coke. In order to remove moisture and volatile substances, the coke made from the pitch coke with a carbon content of up to 99% will be further calcined, which can be used as a material for metal carburetors.If you have any other questions, please contact us for oxidized asphalt details or contact us directly.

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