STANDARD CONSISTENCY TEST
Definition- Standard consistency is define as that consistency which will permit a standard Vicat plunger to penetrate a depth of 33mm to 35mm from the top of mould in a standard vicat apparatus.
Vicat apparatus is used for standard
- Consistency test is used to determine the percentage of water required for preparing cement paste.
- For a cement paste the standard consistency is measured by flow table test which ranges from 26 to 33%.
- Standard consistency of cement is tested by Vicat apparatus
- The standard consistency test determines the water content required to produce a cement paste of standard consistency, which is 30% by weight of the cement.
- The test is required to be conducted at the standard temperature of 27±2°C and constant humidity of 90%.
- The length of the needle varies from 40 mm to 50 mm
- Standard consistency of cement paste may be defined as the consistency which permits the Vicat’s plunger (10 mm, 40 to 50 mm in length) to penetrate to a point 5 mm to 7 mm from the bottom ( or 35 mm to 33 mm from top) of Vicat mould.
- When the cement paste is tested within the gauging time (3 to 5 minutes) after the cement is thoroughly mixed with water.
- Standard consistency (%) = (wt of water added/ wt of cement) *100
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| STANDARD CONSISTENCY TEST |
