AH 50 Bitumen – GB/T Standard Penetration Grade Asphalt Binder for Road Construction and Infrastructure Projects in China and North Korea

AH 50 Bitumen is a widely used penetration grade asphalt binder produced in accordance with Chinese GB (Guobiao) standards, making it one of the most important and demanded bitumen grades in China and North Korea. This grade is specifically designed to deliver stable mechanical performance, controlled penetration values, and reliable durability for road construction, asphalt paving, and infrastructure development projects. Due to its compliance with national GB standards, AH 50 Bitumen is highly accepted in government, municipal, and large-scale public works projects across China.

One of the key characteristics of AH 50 Bitumen is its balanced hardness, which provides excellent resistance to deformation while maintaining sufficient flexibility for long-term pavement performance. Asphalt mixtures produced with AH 50 show strong resistance to rutting under traffic loads, making this grade particularly suitable for highways, urban arterial roads, industrial roads, and heavy-use pavements. At the same time, its controlled ductility helps reduce cracking and surface distress, contributing to lower maintenance costs over the pavement lifecycle.

AH 50 Bitumen is manufactured from carefully refined vacuum residue using controlled processing techniques to meet strict GB technical requirements such as penetration degree, softening point, ductility, wax content, and flash point. These properties ensure predictable behavior during asphalt mixing, transportation, laying, and compaction. Asphalt produced with AH 50 demonstrates good workability, strong adhesion to aggregates, and uniform coating, which are critical factors for consistent asphalt quality in large-scale road construction projects in China and neighboring regions.

In the Chinese market, AH 50 is commonly used for standard road construction projects, municipal infrastructure, industrial zones, and regional highways. It is also suitable for asphalt overlay and rehabilitation works where controlled stiffness and durability are required. Contractors and asphalt producers prefer AH 50 Bitumen due to its reliable performance, ease of handling, and full compliance with GB standards, which are mandatory for many public infrastructure tenders in China and North Korea.

AH 50 Bitumen complies with key GB testing standards, including penetration (GB/T 4509), softening point (GB/T 4507), ductility (GB/T 4508), solubility (GB/T 11148), flash point (GB/T 267), and aging tests such as membrane oven experiments (GB/T 5304). Compliance with these standards guarantees consistent quality, safety during handling, and long-term performance of asphalt pavements, which is a critical requirement for buyers in China and North Korea.

AH 50 Bitumen is supplied in new steel drums, jumbo bags, and bulk shipments, offering flexible logistics solutions depending on project scale and transportation conditions. Thanks to its strong acceptance in the Chinese GB-standard market, stable quality, and cost efficiency, AH 50 Bitumen remains a preferred penetration grade asphalt binder for road construction and infrastructure development projects in China, North Korea, and surrounding regions.