Bricks are tested to know their suitability for the work. For testing samples of bricks are taken and in general 50 bricks are selected for every consignment or stacking of 50,000 bricks.
Dimensional and Tolerance Test
This test is performed to know the accuracy of the dimensions of the bricks which should be within the specified limits.
Sampling of Bricks
- Sample in Motion: In this method, some samples of bricks shall be taken when bricks are being moved as in the case of loading or unloading at regular intervals so as to get a true representation of the whole quantity.
- Sampling from a Stack: In this method, samples shall be taken out at random from a stack of bricks. The number of bricks required for the test shall be selected from the top, the sides accessible and interior of the stack.
Dimensional and Tolerance Test
This test is performed to know the accuracy of the dimensions of the bricks which should be within the specified limits.
To perform this test, 20 bricks out of the sample already taken, are selected at random. All blisters, loose particles of clay and small projections shall be removed.
They shall be arranged upon a level surface in contact with each other and in a straight line according to the dimensions to be measured as shown in figure.
The overall length of the assembled bricks shall be measured accuratly with a steel tape.
No comments:
Post a Comment