Natural bitumen is formed in nature as a result modified asphalt of long-term compaction of the earth's crust and gradual changes in the contact of air with water. Natural bitumen exists in a natural way, often mixed with a certain proportion of minerals.

Natural bitumen is also known as bitumen or mineral bitumen. Petroleum conversion products. The oil penetrates the surface, where the light fractions evaporate, then in the sun, oxidize oxygen in the air, and then aggregate into deposits of bitumen. It is mainly composed of mineral impurities such as asphalt and resin, such as a few metals and non-metals.

According to the composition of the environment, natural asphalt is divided into asphalt, asphalt lake, bottom asphalt, etc. D. Asphalt is a natural bitumen that continuously falls from the earth's crust and exists in rocks, where long-term transpiration forms condensation in the cracks between the rocks.

Classification of natural asphalt:

1) Asphalt (rock asphalt). It is usually created in rock crevices or in a mixture with the ground. Presence in solid rock is cleaner. Partially soluble in trichloroethylene. The existence of soft rocks is due to long-term mixing with inorganic minerals, most of which are insoluble in common hydrocarbon solvents. According to the modified asphalt principle of similar compatibility, it also shows excellent viscosity, water resistance and corrosion resistance.

The softening temperature of natural asphalt produced in Xinjiang is between 130 and 160 ° C, and the needle sags by 0 to 51/10 mm. Since the thickness of the ore body is only 0.3-0.5 meters, the mixed soil contains many impurities, which is difficult to select. Mainly used for the preparation of asphalt pavement or modified road asphalt.

The softening temperature of natural asphalt in Qingchuan, Sichuan is 230-300 °C, the needle is 0 mm, the inorganic matter (ash) content of the main deposit of Qingchuan natural asphalt is generally 15-25%, the thickness of the ore body can be several meters, the reserves are abundant, easy to excavate, development potential and economic value very high. The inorganic matter (ash) content in the cracks of hard rock is less than 10%, the ore body capacity is about 0.5-1 meters, the excavation is difficult and the excavation volume is small. It is mainly used for the modification of high-grade highway asphalt or the capture of asphalt, drilling aids or the preparation of special high-softening asphalt.

(2) Lake asphalt. Naturally deposited bitumen, mixed with clay and water, forms lakes that emulsify the material. Need to be cleaned before use. Inks, varnishes, accumulators, brake pads and printing inks are used in the production of petroleum pitch and black drab. The inorganic matter (ash) content in lake asphalt is generally around 40%, which is suitable for on-site construction and is mainly used to cover the entire road surface.If you have any modified asphalt other questions, please contact us for details or contact us directly.

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