AIM
To determine the specific gravity of semi-solid bitumen road tars,
creosote and anthracene oil as per IS: 1202 - 1978.
PRINCIPLE
It is the ratio of mass of a given volume of bitumen to the mass
of an equal volume of water, both taken at a recorded/specified
temperature.
APPARATUS
SPECIFIC GRAVITY BOTTLES
i) Specific gravity bottles of 50ml capacity
ii) Water bath
iii) Bath thermometer - Range 0 to 44 °C, Graduation 0.2 °C
SAMPLE
Take the sample (half the volume of the specific gravity bottles).
PROCEDURE
i) Clean, dry and weigh the specific gravity bottle alongwith the
stopper (Weight 'A').
ii) Fill the specific gravity bottle with freshly boiled distilled
water and insert the stopper firmly. Keep it in the water bath
having a temperature of 27.0 + 1 °C for not less than half an
hour and weigh it (Weight 'B').
iii) Weigh the specific gravity bottle about half-filled with the
material (Weight 'C').
iv) Weigh the specific gravity bottle about half-filled with the
material and the other half with distilled water (Weight 'D').
v) Weigh the specific gravity bottle completely filled with the
material (Weight 'E').
REPORTING OF RESULTS
The average of the two results should be reporte