Specific gravity of cement
Objective
To determine the specific gravity of cement using Le-Chatelier flask.
Apparatus used:
Le-Chatelier flask, Weighing scale etc.
Description Specific Gravity of Cement is ratio of weight of a volume of cement to the weight of the same volume of kerosene at a specified temperature. Higher specific gravity will affect the workability and strength of the structure.
Weigh the clean and dry Le-Chatelier flask with its stopper.
Weight of empty flask with stopper (W1)= _____ g
Remove the stopper and add weighed amount of cement, then weigh the flask with stopper.
Weight of flask + cement (W2)= _____g
Add kerosene to the flask upto the graduated mark and shake it well to remove air bubbles.
Weight of flask + cement + kerosene (W3)=_____ g
Add kerosene to Le-Chatelier’s flask upto graduated mark and weigh it.
Weight of flask + kerosene (W4) = _____ g
Add water to Le-Chatelier’s flask upto graduated mark and weigh it.
Weight of flask+water (W5) = _____ g
Observation
Empty weight of flask with stopper (W1)= _____ gm
Weight of flask + cement (W2) = _____gm
Weight of flask + cement + kerosene (W3) = _____ gm
Weight of flask + kerosene (W4) = _____ gm
Weight of flask+water (W5) = _____ gm
Specific gravity of kerosene = _____
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Specific gravity of cement= ( W2-W1 ) x Specific gravity of kerosene⁄( W4-W1 )-( W3-W2 )Specific gravity of cement =
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Specific gravity of cement =
Observations:
| Trial | Specifc gravity of cement | Average specific gravity |
| 1 | ||
| 2 |
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Inference:
What is the suggested range of specific gravity of cement?
less than 2.8 2.8 - 3.15 greater than 3.15Trial =
