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Blown Asphalt 90/40

Blown Asphalt 90/40 is an oxidized Asphalt produced by oxidizing a selected petroleum asphalts without adding the catalyst.
Chemical Mine World 90/40 has high softening point, high flash point and it is highly stable during melting.
Blown Asphalt 90/40 is produced by the air-blowing of penetration grade bitumen. This is done at high temperatures, resulting in a material of a much higher penetration index.
Chemical Mine World Oxidized Bitumen 90/40 is based on petroleum bitumen which is made by blowing bitumen 60/70 by very hot air.
The designation of the Oxidized bitumen 95/25 refers to the midpoint of the softening point acceptance criteria.
Oxidized Bitumen is a solid or semi-black solid material and gradually liquid when heated.
Oxidized Bitumen grades are blown or oxidized bitumen‘s which are produced by passing air through soft bitumen under controlled temperature conditions.
This process gives the bitumen more rubbery properties than penetration or hard grade bitumens and a variety of uses in industrial applications.
Chemical Mine World Oxidized Bitumen 90/40 is produced by either Continuous or Staggered Blowing Process. Heated Penetration Grade Bitumen under controlled environment is blown with air which controls the Oil Content in the Bitumen while it oxidized.
The different grades for suited applications produced are designated by two numbers to indicate the mid-points of their softening point and penetration ranges.
Chemical Mine World Oxidized Bitumen 90/40 is based on petroleum bitumen which is made by blowing bitumen 60/70 by very hot air.
In addition, the numbers relate to the midpoint of the material’s softening point and penetration respectively. The softening point value measured by Ring and Ball method as determined by ASTM D36. Also, the penetration value is in 1/10 mm as determined by IP 49 or ASTM- D5.
Chemical Mine World is one of the market leaders in Production, Exports, and brokerage different grades of Blown Asphalt with excellent quality.
Our sales team is committed who understands your requirements due to many years of experience in supplying the bitumen products.
If you are more interested in product information or need to place an order contact or inquire our Sales team.

Application of blown bitumen 90/40:

Blown Asphalt 90/40 is semi-solid oxidized grade of pure petroleum bitumen categorized in polycyclic aromatic hydrocarbons is normally used for different purposes in the construction business.
Blown Asphalt 90/40 is widely used as an anti-slip layer compound in the piling industry, for the manufacture of roofing felts, the roofing and waterproofing industries, for sound dampening felts and under carriage sealant in the automotive industry, electric cable joint protection, joint filling compound, carpet-backing, corrosion protection, acoustic panels, chemical, fuel, Manufacture of paints, sealant compound, and many others. Also used in sealing saw cuts and joints where expected movements are minimum. It is also used in the manufacturing of bituminous marine mastic for the oil & gas pipeline joints. Further, Blown Asphalt is used in the manufacture of bituminous marine mastic, which is required for the oil and gas pipeline joints.

Blown Asphalt has several usages in industry:

Oil and Gas industries:
Coating materials for pipelines and pipe joints of Oil Also Gas Pipelines.

Electrical industries:
The sealant of wire coating

Waterproofing industries:
Building roofing felts in factories and first materials components who are producing waterproofing roofing felt sheets

Bitumen and Asphalt:
Road paving, Asphalt, construction.
Making Sound insulation layers.
Car tires and lining.

Technical Advantages of Blown Asphalt 90/40

  • Durability
  • Flexibility
  • Water Resistant
  • Chemical Stability

Compared to paving grade bitumen:

  • Reduced temperature susceptibility
  • Exhibits a more ‘solid’ nature at ambient temperatures
  • High penetration index

Handling / Storage:

Heating of packaged bitumen is a critical phase in most of the final uses. Typically, the packaged material is heated and melted in boilers out on site.
However, control at the heating phase is very important in terms of health and safety as well as in maintaining the quality of the product.

Note must be taken of the maximum safe handling temperature of 230 C and this should not be abused. Bitumen is a poor conductor of heat, consequently, control of the heating phase is of paramount importance.

The Oxidized Bitumen material should be broken up prior to placement in the boiler. This exposes a larger surface area to the heat and encourages a more even heating regime. Without the larger exposed surface area, aggressive heating at the base and sides of the boiler may well result in localized overheating, altering the characteristics of the Chemical Mine World modified bitumen and potentially causing thermal cracking of the bitumen, creating the release of low lash vapors.
The flash point of the oxidized bitumen then becomes irrelevant; as these low flash vapors determine the fire risk.
Melted bitumen should not be left in the boiler and reheated from cold, as there is then a high potential for localized overheating around the heating area (lack of convection means poor heat transfer) and potential development of a pressurized pocket of low flash vapors.
Be aware of the placement of any temperature monitoring or control devices. As a result of the poor thermal conductivity of the bitumen, a thermometer in the bitumen some distance from the heat source could read significantly different (even hundreds of degrees) from the true temperature of the bitumen near the heat source.
For Health and Safety information, please make reference to the relevant MSDS.

Health & Safety:

Workers should wear protective masks, gloves, and goggles during application. The asphalt can be removed from equipment and tools with kerosene or gasoline. Care should be taken when heating Blown Asphalt 90/40 to avoid over heating

Packing of blown asphalt 90/40:

The Chemical Mine World is manufacturer of blown asphalt 90/40 in various packing including kraft bag, meltable plastic bag, drum and bulk blown asphalt 90/40 from penetration grade bitumen, which is blown by hot air in a controlled process until the desired specification is reached.
The Chemical Mine World oxidized bitumen 90/40 can be supplied in any grade and are designated by two numbers to indicate the softening point and penetration ranges.
The oxidized asphalt grade 90/40 means softening point is 90°c and penetration is 40 desimillimiter is produced in compliance and conformity to ASTM standard and meets the following specification.

Data Sheet of Blown Asphalt 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 5.5 min
Loss on heating(wt) % ASTM  D6 Wt. % 0.2 max
Flash point 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

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