Blown Asphalt 90/40 Description:

Blown Asphalt 90/40, also known as oxidized bitumen 90/40 or blown bitumen 90/40, is a semi-solid grade of pure petroleum bitumen manufactured through air-blowing a flux asphalt. This specific grade exhibits unique physical properties that make it suitable for various applications in the construction industry. It is derived from petroleum bitumen, specifically Asphalt 60/70, through a process involving air-blowing at high temperatures. The numbers 90/40 indicate the midpoint values for the material’s softening point and penetration, respectively. The softening point is determined in degrees Celsius using the Ring and Ball method according to ASTM D36, while the penetration value is measured in 1/10 mm as determined by IP49 or ASTM D5 standards.

Production Process:

Oxidized Asphalt is primarily composed of bitumen, asphalt, molten oils, and aromatic resins. It is a solid or semi-black solid material that gradually becomes liquid when heated. The oxidation process involves subjecting bitumen to hot air blowing in the presence of a catalyst.

Quality Assurance:

BITUPLUS Company ensures the quality of BITUPLUS Blown Asphalt 90/40 by arranging for international inspectors to verify the quality and quantity of the product during loading onto vessels. Additionally, the production process is subject to quality control (QC) through batch test reports before shipping, ensuring compliance with ASTM standards.

Applications:

Blown Asphalt 90/40 finds application in various industrial and construction contexts, including:

• Roof felts.
• Waterproofing.
• Roof and floor materials.
• Anti-rust pipe coatings.
• Anti-slip layer compounds.
• Sound dampening felts.
• Coatings for the automobile industry.
• Joint-filling compounds.
• Sealants.
• Bituminous mastics.

Additional Uses:

• Chemical industry (for producing fuels, paints, lacquers, varnishes).
• Paper-pulp-board manufacturing.
• Textile processing.
• Road construction and pavement applications.
• Civil engineering projects.
• Roofing and construction industries (for sealing and insulating buildings).
• Adhesives.
• Additives for construction materials.
• Dust-binding applications.
• Insulating and impregnating agents.
• Production of rubber and plastic products.
• Water-proofing and corrosion resistance for pipe coatings.
• Portland cement pavement.
• Hydraulic applications.
• Paint manufacturing.
• Caulking.
• Mastics.
• Damp-proofing.
• Insulation and isolation bitumen membrane sheets.

Application Guidelines:

Blown Asphalt 90/40 should be heated to a temperature double that of its softening point to achieve the desired flow and viscosity. Surfaces intended for application should be dry, clean, and free from loose particles, formwork, curing products, irregularities, slurry, and contaminants.

Storage and Handling:

Blown Asphalt 90/40 has a shelf life of up to 10 years and can undergo multiple heating and cooling cycles. It is advisable to store it in a sheltered area, protecting it from rain and direct sunlight.

Packing:

BITUPLUS CO offers Blown Asphalt 90/40 in various packaging options, including Kraft bags, meltable plastic bags, drums, and bulk quantities. The product conforms to ASTM standards and is identified by two numbers indicating the softening point and penetration ranges, with 90/40 representing a softening point of 90°C and a penetration of 40 desi millimeters.

Specification of Bloe Bitumen 90/40

Bitumen 90/40	Test method	Unit	Specification
Specific gravity @25/25 °C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°C	ASTM  D5	mm/10	35/45
Softening point °C	ASTM  D36	°C	85/95
Ductility @25 °C	ASTM  D113	Cm	5.5min
Loss on heating(wt) %	ASTM  D6	Wt. %	0.2 max
Flashpoint °C	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM  D4	Wt. %	99.5 max
Spot test	A.A.S.H.O.T102	—	Negative

For more detailed information about our delivery options or to make inquiries, please don’t hesitate to contact us. Our dedicated team is here to assist you with any questions or requests you may have.