Test procedure for standard cement consistency test
AIM:
To determine the quantity of water required to produce a cement paste of standard consistency.
DEFINITION:
Standard consistency is defined as that consistency which will permit the Vicat’s plunger to penetrate to a point 5 to 7 mm from the bottom of the Vicat mould when the cement is tested.
APPARATUS:
1. Vicat’s apparatus, Mould, Plunger.
2. Standard trowel
3. Stop watch.
4. Weighing balance
DESCRIPTION:
The Vicat’s apparatus consists of a frame and a moving rod weighing 300 gm.
The plunger is kept at the lower end of the rod. It is a cylinder 10 mm. Diameter, A pointer connected to the rod will move along with it when it is released, over a graduated scale kept in front of it. The cement paste to be tested is kept in the Vicat’s mould kept below the rod on a glass plate.
PROCEDURE:
1. Carefully weigh 400 gm of cement and place it on a non-porous surface.
2. Form a crator in the centre in which add about 100 to 120 cc. of water.
3. Thoroughly mix the cement with water and fill, the Vicat’s mould with the paste.
4. The interval from the moment of adding water to the dry cement to the moment of commencing to fill the mould is known as the time of gauging Aurora’s Technological & Research Institute Concrete and Highway Engineering Lab Department of Civil Engineering 4 and shall not be less than 3 minutes and more than 5 minutes. Lower the plunger gently and test the penetration
5. If the penetration is between 5 to 7 mm from the bottom of the mould the quantity of water added is the required consistency. 6. Otherwise repeat the test with different percentages of water until the required penetration is obtained. Express the amount of water as a percentage by weight of the dry cement.
OBSERVATIONS:
Weight of Cement W1
Weight of water W2
Reading on scale mm W2 / W1
Standard consistency CALCULATIONS:
Weight of cement taken = W1.
Weight of water added when the plunger has a penetration of 5 to 7 mm from the bottom of the mould = W2
Percentage of water for standard consistency p = (W2 / W1) x 100
RESULT:
Percentage of water for standard consistency is
AIM:
To determine the quantity of water required to produce a cement paste of standard consistency.
DEFINITION:
Standard consistency is defined as that consistency which will permit the Vicat’s plunger to penetrate to a point 5 to 7 mm from the bottom of the Vicat mould when the cement is tested.
APPARATUS:
1. Vicat’s apparatus, Mould, Plunger.
2. Standard trowel
3. Stop watch.
4. Weighing balance
DESCRIPTION:
The Vicat’s apparatus consists of a frame and a moving rod weighing 300 gm.
The plunger is kept at the lower end of the rod. It is a cylinder 10 mm. Diameter, A pointer connected to the rod will move along with it when it is released, over a graduated scale kept in front of it. The cement paste to be tested is kept in the Vicat’s mould kept below the rod on a glass plate.
PROCEDURE:
1. Carefully weigh 400 gm of cement and place it on a non-porous surface.
2. Form a crator in the centre in which add about 100 to 120 cc. of water.
3. Thoroughly mix the cement with water and fill, the Vicat’s mould with the paste.
4. The interval from the moment of adding water to the dry cement to the moment of commencing to fill the mould is known as the time of gauging Aurora’s Technological & Research Institute Concrete and Highway Engineering Lab Department of Civil Engineering 4 and shall not be less than 3 minutes and more than 5 minutes. Lower the plunger gently and test the penetration
5. If the penetration is between 5 to 7 mm from the bottom of the mould the quantity of water added is the required consistency. 6. Otherwise repeat the test with different percentages of water until the required penetration is obtained. Express the amount of water as a percentage by weight of the dry cement.
OBSERVATIONS:
Weight of Cement W1
Weight of water W2
Reading on scale mm W2 / W1
Standard consistency CALCULATIONS:
Weight of cement taken = W1.
Weight of water added when the plunger has a penetration of 5 to 7 mm from the bottom of the mould = W2
Percentage of water for standard consistency p = (W2 / W1) x 100
RESULT:
Percentage of water for standard consistency is
