What happens when bitumen is overheated?
For example, bitumen heated in temperatures above 205 °C liquefies and the stability of asphalt concrete used with this bitumen decreases. Binder overheating susceptibility is associated with its sensitivity to ageing.
What is bituminous binder?
Bituminous binders are adhesive materials that contain bitumen, which may be in the form of conventional bitumen, modified bitumen or bitumen emulsion.
What are common tests of bitumen?
The following tests are usually conducted to evaluate different properties of bituminous materials….Loss on heating test.
| Type of test | Test Method |
|---|---|
| Specific gravity test | IS: 1202-1978 |
| Viscosity test | IS: 1206-1978 |
| Flash and Fire Point test | IS: 1209-1978 |
| Float Test | IS: 1210-1978 |
What are the different grades of bitumen?
Viscosity grade bitumen in four different types including VG10, VG20, VG30 and VG40 is the most widely used bitumen in India, which has been replaced by bitumen penetration grade according to the Indian Standard (IS:73). This kind of bitumen is more reliable than others due to its advantages and properties.
How does temperature affect bitumen?
The higher the temperature, the lower the bitumen stiffness and asphalt mix stiffness and the higher the fatigue life asphalt mix. At the same temperature, asphalt mix stiffness of dense graded mixture is higher than gap graded mixture.
Can you heat bitumen?
The bitumen is actually heated by a heating tube which is W-shaped which has an automatic burner. For those looking to buy bitumen tanks, there are basically two options. You can either opt for a hot oil heated storage tank or a direct heating storage tank.
What are the properties of bituminous binder?
Properties of Bitumen and Bituminous Materials
- Adhesion.
- Resistance to Water.
- Hardness.
- Viscosity and Flow.
- Softening Point.
- Ductility.
- Specific Gravity.
- Durability.
What is aging of bitumen?
In general, bitumen aging takes place in two stages, namely short-term aging at high temperature during asphalt mixing, storage and laying, and long-term aging at ambient temperature during in-service. The mechanisms of aging include oxidation, evaporation and physical hardening.