Blown asphalt 90/40
General description of blown asphalt 90/40
Blown asphalt 90/40 (in another word, oxidized bitumen 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 point and penetration.
RABIT (RAHA BITUMEN) company guaranty the quality of RABIT blown asphalt 90/40 with the arrangement of the international inspector to check quality and quantity of the blown asphalt 90/40 during the loading to the vessel and controlling the production by QC by batch test report before shipping. RABIT Company guarantees the quality to meet with ASTM.
Uses of blown asphalt 90/40
BLOWN ASPHALT 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 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. The asphalt 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.
Application of blown asphalt 90/40
The 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.
Storage/handling of blown asphalt 90/40
Blown asphalt 90/40 has 10 years validity with multi-time heating and cooling, please refer to MSDS.
Packing of blown asphalt 90/40
Various pickings are available for customer’s purpose and conveniences. RABIT CO is the manufacturer of blown asphalt 90/40 in various packing including Kraft bag, meltable plastic bag, drum, and bulk blew asphalt 90/40 from penetration grade bitumen, which is blown by hot air in a controlled process until the desired specification is reached. RABIT Blown asphalt 90/40 can be supplied in any grade and are designated by two numbers to indicate the softening point and penetration ranges. The asphalt grade 90/40 means the softening point is 90°c and penetration is 40 desi millimeter is produced in compliance and conformity with ASTM standard and meets the following specification.
Specification of blown asphalt 90/40
Analysis 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 | 5.5min |
| 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 |
