AIM:
As per IS: 1202 - 1978 -Determine the specific
gravity of semi-solid bitumen road tars, creosote and anthracene oil.
Apparatus/Equipment:
Specific reliability bottles
i) Special gravity bottles of 50 ml capacity
ii) Water bath
iii) Bath Thermometer with Range 0 to 44 ℃, graduation 0.2 ℃
Sample:
Take a sample (half of the specific gravity
bottles).
Theory:
It is the ratio of the mass of a given volume of
bitumen to the mass of the same volume of water, both taken at a record /
specified temperature.
Procedure:
i) Clean, dry and weigh specific gravity bottle with
stopper (weight - A).
ii) Fill the specific gravity bottle with specific
boiled distilled water and put the stopper firmly. Put it in a water bath with
a temperature of 27 + 1 oC for no less than half an hour and weigh
it (weight - B).
iii) Weigh specific gravity bottle of about half
filled with material (weight - C ).
iv) Weigh specific gravity bottle-half filled with material
and other half with distilled water (weight - D ).
v) The specific gravity bottle is completely filled
with material (weight - E ).
Result:
i) Specific gravity (solid and semi-solid) = (C-A) /
{(B-A) - (D-C)}
ii) Specific gravity (fluid or liquid) = (E-A) /
(B-A)
The average of the two results should be stated.
Differences between:
Whole Circle Bearing vs Quadrantal Bearing
Lintel level vs Sill level vs Plinth level
Construction Joint vsExpansion Joint
Site Engineer vs SiteSupervisor
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