AH 70 Bitumen – GB/T Standard Penetration Grade Asphalt Binder for Road Construction and Infrastructure Projects in China and North Korea

AH 70 Bitumen is one of the most important and widely used penetration grade asphalt binders in China and North Korea, produced in full compliance with Chinese GB (Guobiao) standards. This grade is specifically designed to meet the technical and performance requirements of large-scale road construction, highway paving, and infrastructure development projects. Due to its strong acceptance in the Chinese market, AH 70 Bitumen is frequently specified in government tenders, municipal road projects, and national transportation networks.

The key advantage of AH 70 Bitumen lies in its balanced penetration range, which provides an excellent combination of stiffness and flexibility. This balance allows asphalt pavements to resist rutting and deformation under heavy traffic loads while maintaining sufficient ductility to minimize cracking. As a result, AH 70 Bitumen is highly suitable for highways, urban arterial roads, industrial zones, and heavily trafficked pavements in moderate to warm climate conditions, which are common across many regions of China and the Korean Peninsula.

AH 70 Bitumen is manufactured from carefully refined vacuum residue using controlled processing technologies to ensure stable penetration, softening point, ductility, and aging performance. These controlled properties guarantee predictable behavior during asphalt mixing, transportation, laying, and compaction. Asphalt mixtures produced with AH 70 show excellent workability, strong adhesion to aggregates, and uniform coating, leading to smooth pavement surfaces and long-term structural stability.

In China, AH 70 Bitumen is commonly used as a standard grade for national highways, provincial roads, airport access roads, and major municipal infrastructure projects. It is also widely applied in asphalt overlay and rehabilitation works where controlled stiffness and durability are required. The consistency and reliability of AH 70 Bitumen make it a preferred choice for contractors and asphalt producers aiming to meet strict quality control requirements.

AH 70 Bitumen fully complies with key GB testing standards, including penetration (GB/T 4509), softening point (GB/T 4507), ductility (GB/T 4508), density (GB/T 8928), solubility (GB/T 11148), flash point (GB/T 267), wax content (SH/T 0425), and aging performance through membrane oven experiments (GB/T 5304). Compliance with these standards ensures consistent quality, safe handling, and reliable long-term pavement performance, which are essential requirements for buyers in China and North Korea.

AH 70 Bitumen is available in new steel drums, jumbo bags, and bulk shipments, providing flexible packaging and logistics options based on project scale and transportation needs. Thanks to its GB standard compliance, proven field performance, and strong market acceptance, AH 70 Bitumen remains a key penetration grade asphalt binder for road construction and infrastructure development projects in China, North Korea, and surrounding East Asian markets.