What is Oxidized Bitumen 75/25
Oxidized Bitumen 75/25 is a semi-solid bitumen product produced by air-blowing through asphalt flux, which is pure petroleum bitumen. The air-blowing process develops the physical properties to an extent that the material is applied in various ways in construction applications. The material is based on 60/70 petroleum bitumen that has been oxidized by hot air. The number 75/25 indicates the midpoint of its softening point and penetration values. Softening point value is given by the Ring and Ball method, in °C, according to ASTM D36, and the penetration value is expressed in 1/10 mm, according to ASTM D5 or IP 49.
It has a high softening point than any other grade of oxidized bitumen and is very resistant to changes in temperature. Being more stable in the case of change of conditions, it shall be used under more harsh operating conditions. Oxidized Bitumen: one type of bitumen which, on heating, reaches a liquid state that consists of bitumen, asphalt, molten oils, and aromatic resins. They have different softening points and penetrations.
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Oxidized Bitumen 75/25 Application
his kind of bitumen is suitable to be used in the chemical, raw material for bitumen coat, paper-pulp-board, textile processing, pavement, crack seal and repairmen, civil works, bitumen coat for piping, roofing, construction industries; sealing and insulating buildings, adhesive, construction materials additive, road construction, dust-binding, insulating and impregnating agent, isolation bitumen membrane sheet, make rubber and plastic products.
typical uses for bitumen 90/40 include roofing, pipe coating, hydraulic applications, 75/25 is mainly used in paint manufacturing and coating in the hot areas.
Storage and Handling of Oxidized Bitumen 75/25
Blown asphalt 75/25 is best up to 10 years from the day it was manufactured. It is suggested for the higher time of warehouse keeping to keep the bitumen under shelter and out of the rain and sunshine.
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.
Packing
Blown Asphalt 75/25 is available in various packing options, including Kraft Paper Bags, Carton boxes, and Steel Drums. Mold packing is the most expensive but easy to remove. Polyamide bags are heat-resistant and can be filled with water for quick cooling. Craft bags are recyclable and have special materials to prevent bitumen sticking. These grades can be loaded on or without a pallet for customer convenience.
Specification
| Bitumen 75/25 | Test method | Unit | Specification |
|---|---|---|---|
| Specific gravity @25/25 °C | ASTM D70 | (Kg/m3) | 1.05 approx. |
| Penetration @ 25 °C | ASTM D5 | mm/10 | 20/30 |
| Softening point °C | ASTM D36 | °C | 70/80 |
| 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.T.O 102 | — | Negative |
FAQs
1. Is Oxidized Bitumen 75/25 resistant to high temperatures?
Yes, this product has a high softening point and can withstand elevated temperatures, making it ideal for industrial and construction applications.
2. Is this product recyclable?
The Kraft packaging for this product is recyclable, hence contributing to environmental sustainability.
3. Is Oxidized Bitumen 75/25 suitable for use in cold climates?
Yes, due to its flexibility and resistance to temperature fluctuations, this product is well-suited for use in cold climates.
