AIM:
To determine the quantity of water required to produce a cement paste of standard consistency as per IS: 4031 (Part 4) – 1988.
PRINCIPLE:
The standard consistency of a cement paste is defined as that consistency which will permit the Vicat Plunger to penetrate to a point 5 to 7 mm from the bottom of the Vicat mould.
APPARATUS:
1) Vicat apparatus conforming to IS: 5513 – 1976
2) Balance, whose permissible variation at a load of 1000g should be +1.0g
3) Gauging trowel conforming to IS: 10086 – 1982
PROCEDURE:
- Weigh approximately 400g of cement and mix it with a weighed quantity of water. The time of gauging should be between 3 to 5 minutes.
- Fill the Vicat mould with paste and level it with a trowel.
- Lower the plunger gently till it touches the cement surface.
- Release the plunger allowing it to sink into the paste.
- Note the reading on the gauge.
- Repeat the above procedure taking fresh samples of cement and different quantities of water until the reading on the gauge is 5 to 7mm.
RESULTS:
Express the amount of water as a percentage of the weight of dry cement to the first place of decimal.
Technical Discussion:
- If you add Less water than its quantity couldn’t complete chemical reaction. Thus, resulting is reduction of strain.
- If you add more water would increased water cement ratio and so would reduce its strength.
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ALSO READ:-
- INITIAL AND FINAL SETTING TIME OF CEMENT
- SOUNDNESS TEST OF CEMENT
- Compressive strength test of cement
it is very helpful and informative can you please write all the TEST OF CEMENT & CONCRETE.
thank you bhargavi for visiting my website, Sure i will try to write about the the experiments of cement and concrete as soon as possible.
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Hlo sir. How can we take water quantity consistency test cement usually we start 25% to 32% is there any IS or ASTM code available to choose the water quantity consistency test.
There is NO fixed water % in IS or ASTM. 25%–32% water range comes from standards-based trial guidance.
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