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A typical flash point test involves heating a small sample of asphalt binder in a test cup. The temperature of the sample is increased and at specified intervals, a test flame is passed across the cup.

The flashpoint is the lowest liquid temperature at which application of the test flame causes the vapours of the sample to ignite. The test can be continued up to the fire point – the point at which the test flame causes the sample to ignite and remain burning for at least 5 seconds.

Standard Test Methods

1- AASHTO T 48 and ASTM D 92: Flash and Fire Points by Cleveland Open Cup (more common for asphalt cement used in HMA)

2- AASHTO T 73 and ASTM D 93: Flash-Point by Pensky-Martens Closed Cup Tester

The lower the flashpoint, the easier it is to ignite the material. For example, gasoline has a flashpoint of -40 degrees C (-40 F) and is more flammable than ethylene glycol (antifreeze) which has a flashpoint of 111 degrees C (232 F).
lowest temperature corrected to a pressure of kPa at which application of an ignition source causes the vapours of a specimen of the sample to ignite momentarily under specified conditions of the test. flashpoint values are not a constant physical property of the material tested; they depend on Apparatus Design: open/closed cup. Operational Procedure. Operator (manually operated testers)

For more information watch this video

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