Page 64 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

REFERENCE
WORK PROCESS DOCUMENT

4. . Heat the water for a minimum of 15 minutes and not more than 30
minutes.

e. Testing of the Specimen:

1. Remove the collar along with the sample from the base plate.

2. Place the sample along with the collar to the aluminum float and
fix it with a screw.

3. Immerse this assembly in water for 1 minute at 5 °C.

4. Take out the assembly from the water and remove the water from
inside of the float, if present inside.

5. Hover the assembly immediately into warm bath prepared
previously of temperature about 50 °C ensuring that the collar is
tightly attached to the float. No seepage of water should occur at

the time of testing between the collar and float.
6. Take a stopwatch and start the timer as soon as the assembly is

introduced into the warm bath.

7. Note the time in seconds at which the water breaks through the
specimen with the help of a stopwatch. This time gives the float
value.

DATA :

Following observations are to be recorded during the float test of
bitumen
(A sample observation table for float test of bitumen is drawn
below)

Observations Specimen – 1 Specimen – 2

Time in Second

Float Value = Average float value of 1 and 2.

Higway Engineering Laboratory page 51