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Oxidized Bitumen 90/40 Definition

Oxidized bitumen 90/40 (in another word, Blown asphalt 90/40 , blown bitumen 90/40) is Semi Solid grade of pure petroleum bitumen manufactured by air-blowing through an asphalt flux. Special physical properties of its grade can be used in different applications in the construction business. blown asphalt 90/40 is based on petroleum bitumen which is made by blowing asphalt 60/70 by very hot air. The numbers relate to the midpoint of the material’s softening point and penetration respectively. The softening point value is the degrees Centigrade measured by the Ring and Ball method as determined by ASTM D36. The penetration value is in 1/10 mm as determined by IP49 or ASTM D5.
Oxidized Asphalt is a solid or semi-black solid material and gradually liquid when heated, oxidized asphalt is predominant content bitumen, asphalt, molten (oils) and aromatic resins. The oxidized asphalt or blown asphalt is producing in different softening pointand penetration.

Oxidized Bitumen 90/40 Applications

Oxidized Bitumen 90/40 uses in the chemical, fuel, paints, lacquers, varnishes, paper-pulp-board, textile processing, road construction, pavement , crack seal and repairmen, civil works, roofing, construction industries; sealing and insulating buildings, adhesive, construction materials additive, dust-binding, insulating and impregnating agent, make rubber and plastic products.
Oxidized Bitumen 90/40 products are for paving. also used in asphalt-based paints for corrosion protection of metals, in lining public works structures, adhesives in electrical laminates, base for synthetic turf; typical uses for asphalt 90/40 used also for water-proof application and corrosion resistance for pipe coating, Portland cement pavement, hydraulic applications, paint manufacturing, caulking, mastics, and damp proofing. Blown asphalt 90/40 is using insulation and isolation bitumen membrane sheet. Also, Car undercoating Automobile industry is especially required for Blown Asphalt. Vehicle undercoating material is based on Bitumen. Bitumen provides excellent waterproof, dustproof and noise proof for automobile undercoating.


Oxidized Bitumen 90/40 is bitumen obtained from crude oil refining and then subjected to an oxidation process with a catalyst by using hot air blow. It is used in hot mix supply solution using several layers of product, but its main purpose and objective is for industrial applications such as roof felts, waterproofing, roof an floors anti-rust pipe coating, anti-slip layer compound, sound dampening felts, coats for automobile industry, joint filling compounds, sealants, bituminous mastic and many more.

Blown asphalt 90/40 should be heated double temperature against the softening point to be able to have flow and viscosity. To use asphalt 90/40, surfaces must be dry, clean and free of loose particles, formwork, curing products, irregularities, slurry, etc.

Blown Asphalt 90/40 CHARACTERISTICS

CHARACTERISTIC 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
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