Flash And Fire Point Test Essay

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EXPERIMENT NO. 6
FLASH AND FIRE POINT TEST FOR ASPHALT BY CLEVELAND OPEN CUP

RELATED THEORY

FLASH POINT
Flash point is the lowest temperature corrected to a barometric pressure of 101.3 kPa (760 mm Hg), at which application of a test flame causes the vapor of a specimen to ignite under specified conditions of test.

The material is deemed to have flashed when a large flame appears and instantaneously propagates itself over the surface of the specimen.

Note: Occasionally, particularly near the actual flash point, the application of test flame will cause the blue halo or an enlarged flame; this is not a flash and should be ignored.

FIRE POINT
It is the lowest temperature at which a specimen will sustain burning for 5 seconds.

A flammable material is the one, which form flames, but does not sustain fire while a combustible material is the one, which sustains fire/burning.

SOURCES OF BITUMEN
Bitumen is generally obtained from the following three sources;
        i) Naturally occurring (in West Indies).
      ii) Extracted from Limestone and Sandstone (procedure adopted in USA).
      iii) From Oil Refineries (this is the major source of bitumen in Pakistan).

ASPHALT CEMENT (AC)
Asphalt Cement shall be oil asphalt or a mixture of refined liquid asphalt and refined solid asphalt, prepared from crude asphaltic petroleum. It shall be free from admixture with any residues obtained by the artificial distillation of coal, coal tar or paraffin and shall be homogeneous and free from water.

|Temperature Condition                                       |* Asphalt Grade                                       |
|Cold, mean annual air temperature                           |AC-10                                                 |
|< 7 °C (45 °F)                                             |AR-4000                                               |
|                                                           |80 / 100 pen...

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