Initial Setting Time Of Cement
Apparatus : Vicat's Plunger
Theory: It is the time elapsed between the moment that the water is added to the cement to the time that the paste starts loosing it's plasticity.
Procedure:
I. Take 300gm of cement and make a cement paste of consistency 0.85 P.
II. Attach the square needle to the Vicat Plunger and lower it gently to make contact with the surface of the test block and quickly release it.
III. When the needle penetrates only to a depth of 33 to 35 mm from the top the test is completed.
I. Take 300gm of cement and make a cement paste of consistency 0.85 P.
II. Attach the square needle to the Vicat Plunger and lower it gently to make contact with the surface of the test block and quickly release it.
III. When the needle penetrates only to a depth of 33 to 35 mm from the top the test is completed.
Note: Initial Setting Time should not be less than 30 minutes for OPC and 60 minutes for low heat cement.