How flash and fire point test are carried out?
Test Procedure Fill the cup with softened bitumen up to the filling mark provided on the cup. Now place the lid and close the cup. Other accessories like thermometer and flame exposure are suitably fixed in their respective positions. Now lit up the flame and set the size of flame to 4mm in diameter.
What is a flash point test and a fire point test?
It is the lowest temperature at which the vapour of a bituminous material momentarily takes fire in the form of a flash, under specified conditions of test. Fire point. It is the lowest temperature at which bituminous materials ignite and burn under specific conditions of test.
What is fire point of bitumen?
Fire Point – The fire point is the lowest temperature at which the application of test flame causes the material to ignite and burn at least for 5 seconds under specified conditions of the test. The sample should be just sufficient to fill the cup upto the mark given on it. i) Soften the bitumen between 75 and 100oC.
What is the unit of fire point?
Fire point refers to the temperature at or above which a flammable liquid produces enough vapor to ignite by spark or flame and burn for at least five seconds. The fire point is usually 10°C more than the flash point of a liquid.
What is specific gravity of bitumen?
The specific gravity of pure bitumen is in the range of 0.97 to 1.02.
What is the significance of fire point?
Fire point: The fire point of a fuel is the lowest temperature at which the vapour of that fuel will continue to burn for at least 5 seconds after ignition by an open flame. 1) The fire point is used to assess the risk of the materials ability to support combustion.
What is softening point test?
The determination of softening point helps to know the temperature up to which a bituminous binder should be heated for various road use applications. Softening point is determined by ring and ball apparatus.
What is the difference between flash and fire point?
The observed temperature when the flame momentarily ignites the vapor/air mixture is the Flash Point. The ignitions repeat as the liquid temperature continues to rise. The observed temperature when the burning becomes continuous is the Fire Point. Liquid is heated, but without an ignition source.
What is the use of fire point?
The fire point is the temperature at which lubricant combustion will be sustained. The flash and fire points are useful in determining a lubricants volatility and fire resistance. The flash point can be used to determine the transportation and storage temperature requirements for lubricants.
What is the unit weight of bitumen?
Unit Weight Of Building Materials
| Material | Unit Weight |
|---|---|
| Sand (wet) | 1760 to 2000 Kg/ m3 |
| Steel | 7850 Kg/ m3 |
| Chalk | 2100 Kg/ m3 |
| Bitumen | 1040 Kg/ m3 |
Which comes first flashpoint or fire point?
It means; the term fire point describes that it is the lowest temperature for a substance to hold the combustion for a small time period after the ignition by an open flame. Usually, the fire point of a substance is about 10 °C higher than the flash point of the same substance.
Why VG 30 bitumen is used?
VG-30 BITUMEN: VG-30 is primarily used to construct extra heavy duty Bitumen pavements that need to endure substantial traffic loads. It can be used in lieu of 60/70 Penetration grade.
What is the density of bitumen?
1.01-1.05 g/cm 3
The density of bitumen is 1.01-1.05 g/cm 3 in the temperature range of 25°C to 85°C [63] .
What is ring and ball test?
Ring and ball test is used to determine the softening point of bitumen, asphalt and coal tar. This test consists of two brass ring and two steel ball, using which the softening point of various bituminous materials are determined. Contents: Softening Point of Bitumen, Asphalt and Coal Tar. Uses of Softening Point.
What percentage of oxygen is needed to produce a fire point?
Air contains about 21 percent oxygen, and most fires require at least 16 percent oxygen content to burn.