Blown asphalt 90/40, also known as oxidized bitumen 90/40 or blown bitumen 90/40, occupies a crucial position among petroleum bitumen derivatives. Produced by air-blowing hot air through asphalt flux, this semi-solid substance exhibits distinctive physical properties tailored for diverse construction applications. The designation ’90/40′ signifies specific characteristics: a softening point of 90°C and a penetration value of 40 dmm (1/10 mm), determined respectively by ASTM D36 Ring and Ball method and IP49/ASTM D5 standards.

Composition and Manufacturing Process of 

It originates from petroleum bitumen, specifically through the blowing of asphalt 60/70 with high-temperature air. This controlled process alters its molecular structure, enhancing viscosity and durability suitable for demanding industrial applications. Semi-solid at ambient temperatures, it behaves like a liquid upon heating due to its high asphaltene content, comprising bitumen, aromatic resins, and molten oils.

Quality Assurance by Basekim

Basekim ensures blown asphalt 90/40 meets stringent quality standards through rigorous inspection and testing protocols.

International inspectors oversee quality checks during vessel loading, and batch testing reports validate compliance with ASTM standards. This commitment underscores Basekik’s dedication to delivering consistent, high-quality products for diverse construction needs.

Applications Across Industries

It is widely utilized across various sectors:

• Construction Industry: Essential in hot mix asphalt, it provides robust waterproofing for roofs, anti-rust coatings for pipes, and sound-dampening layers in flooring. 
• Its viscosity and adhesive properties make it ideal for joint fillings, sealants, and bituminous mastics used in road construction and pavement repairs.
• Chemical and Manufacturing Sectors: Acts as a base material in paints, lacquers, varnishes, and adhesives, enhancing durability and weather resistance. 
• Used in textile processing for waterproofing and fabric strengthening, and in paper-pulp-board production as a binding agent and moisture barrier.
• Automotive Industry: Provides undercoating solutions that waterproof and insulate vehicle chassis, reducing noise within automotive interiors for a quieter ride experience.
• Miscellaneous Uses: Dust-binding on roads, impregnating agents for rubber and plastic manufacturing, and insulating material in electrical laminates and synthetic turf bases.

Usage and Storage Guidelines

It must be heated to double its softening point temperature for proper flow and viscosity during application.

Surfaces should be meticulously prepared—clean, dry, and free from contaminants—to ensure effective adhesion and sealing.

Storage and Packaging 

With a shelf life of up to 10 years under proper conditions, blown asphalt 90/40 accommodates multiple heating and cooling cycles without compromising efficacy.

Carbokim offers various packaging options such as Kraft bags, meltable plastic bags, drums, and bulk shipments, all maintaining ASTM specifications upon arrival.

This structured approach ensures comprehensive coverage of blown asphalt 90/40, facilitating clarity and readability while emphasizing practical applications and technical specifications crucial for industry professionals and stakeholders.

Specification of Blown Asphalt 90/40

Download the Specification of Bitumen 90/40

Download the MSDS of Bitumen 90/40