Page 63 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

REFERENCE
WORK PROCESS DOCUMENT

brass plate.

5. Pour the air-free homogenous bitumen sample into the collar as
per your convenience till it is filled slightly above the top.

B. Asphalt and Asphalt Products :

1. Allow the specimen to cool down at room temperature for about
15 minutes.

2. Then place the specimen in the water bath for 5 minutes and
maintain the temperature of 5 °C.

3. Remove the sample from the water and trim the sample from the
top of the collar with the help of a slightly-heated steel knife or a
spatula.

4. Place the collar and base plate with the sample again in the water

bath for at least 15 minutes at 5°C. Care should be taken that the
duration does not exceed 30 minutes.

C. Tar Product :

1. Immerse the tar products in the water of the water bath
immediately for 5 minutes and maintain the temperature of 5 °C.

2. Remove the sample from the water and trim the sample from the
top of the collar with the help of a slightly-heated steel knife or a
spatula.

3. Place the collar and base plate with the sample again in the water
bath for at least 15 minutes at 5°C. Care should be taken that the
duration does not exceed 30 minutes.

D. Preparation of Warm Bath:
1. Heat the water bath to the temperature required for testing of the

sample- 50 °C.

2. Maintain this temperature throughout the test without stirring.
Variations up to ± 5°C from the specified temperature are allowed.

3. Ensure the temperature by immersing the thermometer in the
water. The bulb of the thermometer should be immersed below the
top of the water level to a depth of 40 ± 2 mm.

Higway Engineering Laboratory page 50