AH70 or 70A is a high-quality petroleum bitumen asphalt and road-building asphalt produced by SEBCO in compliance with national standards and Technical Specifications for Construction of Highway Asphalt Pavements (JTG F40-2004) by the Ministry of Transportation of China.

Chinese Bitumen (AH70) is a type of refinery bitumen obtained from the vacuum distillation of the tower and has a penetration degree between 60 and 70. This grade of bitumen is produced through a blowing process in a refinery, like other penetration grades. Due to its medium air blowing and penetration, it is suitable for mild areas and highly recommended for use in temperate climates. Chinese Bitumen (AH70) is mainly used for road pavement and is commonly used in road construction, insulation, building construction, and liquid bitumen production. It is more suitable for use in temperate climate regions. Sebco is one of the companies that produce high-quality Chinese Bitumen (AH70).

Here are some features of Chinese Bitumen (AH70):

1. Softening point: Its softening point is between 49 and 56 degrees Celsius. This means that this bitumen hardens at temperatures below 49°C and softens at temperatures above 56°C.

2. Boiling point: The boiling point of 70/60 bitumen is between 220 and 260 degrees Celsius.

3. Adhesion: The adhesion of this type is good. This means that this bitumen can adhere well to other surfaces.

4. Permeability: Its permeability is relatively low, which means that this bitumen is resistant to water penetration.

5. Dynamic softening temperature: Its dynamic softening temperature is between 35 and 45 degrees Celsius.

6. Dynamic friction coefficient: its dynamic friction coefficient is between 0.4 and 0.6.

Chinese Bitumen (AH70) is available in different packing options including steel Drum, Jumbo Bag, Bitutainer, and Bulk.