STANDARD
- IS: 4031- 1988.
DEFINITION
- Specific Gravity is defined as the ratio of the mass of the cement to the mass of an equal volume of Kerosene.
APPARATUS
- Standard Le- Chatelier flask 250 ml capacity
- Balance of capacity 500 gm and sensitivity to 0.01 grams.
PROCEDURE
- Clean and dry the Le- chatalier flask.
- Fill the flask with kerosene exactly up to the zero graduation.
- Take approximately about 70 grams of cement and pour it into the flask.
- Shake well until no air bubbles are visible in the flask.
- Allow the cement in the flask to settle down completely, preferably 24 hours.
- Note the volume of kerosene read from the flask.
- Make at least two determinations for each test.
CALCULATIONS
- Specific Gravity = (Weight of cement / Volume of kerosene read from the flask)
REPORT
- Report the individual and the mean results to the nearest second decimal.
PRECAUTION
- Care shall be taken to avoid loss while pouring the cement in to the flask.
DETERMINATION OF SPECIFIC GRAVITY
IS: 4031-1988
| Description | Units | Test I | Test 2 |
| Actual test temperature | ° C | ||
| Weight of cement | gms | ||
| Volume of kerosene read from the flask after 24 hours | ml | ||
| Weight of cement Specific Gravity Volume of kerosene read from the flask |
— | ||
| Average Specific Gravity | — | ||
| Remarks: | |||