What is Oxidized Bitumen 105/15?
Oxidized Bitumen 105/15 is a semi-solid petroleum product created by blowing hot air through asphalt flux.
The numbers indicate the mid-range penetration (1/10 mm) and softening point (°C), measured by ASTM D5 and D36 standards, respectively.
Produced from grade 60/70 bitumen, this material requires heating to twice its softening point for proper flow. In bale form, it heats to 230°C, while bitumen in bags needs an extra 50°C to melt.
Ensure surfaces are dry, clean, and free of debris before applying bitumen 115/15, as poor preparation can lead to detachment.
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Blowing process bitumen 105/15
The short residue is added to the blowing column just below the typical liquid level after it has been preheated. At the foot of the column is an air distributor that blows air through the bitumen. The air increases the surface area and the rate of reaction by agitating and mixing the oxidized bitumen 105/15 in addition to acting as a reactant. As air rises through bitumen, oxygen is absorbed by the substance. Water and steam are sprayed into the vapour space above the bitumen level; the latter cools the vapours to avoid after-burning and the subsequent creation of coke, while the former suppresses foaming and dilutes the oxygen content of waste gases.
Uses of Oxidized Bitumen 105/15
Bitumen 105/15 is being used across various industries due to its different applications. In electrical cable joint protection, in joint filler compounds, sealant compounds, roofing felts, sound-dampening felts, and as an undercarriage sealant in the automotive sector, Bitumen 105/15 is in great demand. Furthermore, this is an anti-slip layer compound used in the piling industry.
This bitumen is used as a major raw material for roofing, insulation, bitumen coatings, and isolation membrane sheets. It also makes paints, lacquers, varnishes, pulp and paper boards, textile processing, carpet backing, corrosion protection, acoustic panels, and chemicals. In civil works, it is applied in roofing, pavement, crack sealing, road construction, dust-binding, coatings, adhesives, additives for building material, and sealing or insulating structures. Rubber and plastic manufacturing uses it, too, as an insulating and impregnating agent. Bitumen 105/15 products will be suitable for paving. Its main uses are in adhesives for electrical laminates, synthetic turf bases, asphalt-based paints for corrosion protection, and in the construction of public works. In general, their applications are paints manufacturing, Portland cement pavements, coating pipes and roofing, hydraulic systems.
Storage and Handling of Oxidized Bitumen 105/15
Blown asphalt 105/15 is best up to 10 years from the day it was manufactured. It is suggested for higher time of warehouse keeping to keep the bitumen under shelter and out of the rain and sun shine.
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.
Oxidized Bitumen 105/15 VS Oxidized Bitumen 115/15
Oxidized Bitumen 105/15 has a relatively low softening point at 105°C compared to the 115/15 grade, thus having more flexibility for moderate temperature conditions. This flexibility is quite useful in roofing and waterproofing applications where slight movement is expected.
On the other hand, 115/15 is much softer at a higher temperature (115°C), which endows it with better heat resistance and will thus be more suitable for regions at a higher temperature or exhibiting full weathering conditions. Both of the grades are versatile, but a decision depends on specific demands caused by environmental conditions.
Packing
Blown Asphalt 115/15 includes bitumen 105/15, which is available in various presentations: 20 and 50 kg Kraft paper bags, 25 kg carton boxes, and steel drums of 150, 180, or 200 kg. The packing in 25 kg mold is the most expensive, but it has a removable carton mold for easy handling at the destination. The heat-resistant polyamide bag of 25 kg allows cooling of the product directly in water with the bag stuck on the bitumen, not removable upon use. Last but not least, there is the recyclable 25-kg Kraft bag lined, so it is non-sticky.
Specification
| Bitumen 105/15 | Test method | Unit | Specification |
|---|---|---|---|
| Specific gravity @25/25 °C | ASTM D70 | (Kg/m3) | 1.05 approx. |
| Penetration @ 25 °C | ASTM D5 | mm/10 | 10/20 |
| Softening point °C | ASTM D36 | °C | 100/110 |
| 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 |
