Lot: LOT is a collection of bricks of the same class and size, manufactured under relatively similar conditions of production. For the purpose of sampling, a lot shall contain a maximum of 50 000 bricks
Philosophy of Sample Collection
- Random Sampling: Collecting samples at random from different stacks
- Stratified Sampling: Dividing the stacks into strata or sections and collecting samples randomly from each so that a true sample set is collected (As per IS 4905: 2005 (Reaffirmed 2020))
Sample Collection Methods
- Sampling in motion: Collecting samples randomly when bricks are being moved
- Sampling from Stack: Collecting samples from existing stacks by dividing the stack into imaginary sections and selecting randomly
- Sampling from trucks and lorries: Collecting samples randomly from different trucks or lorries.
Sample Collection for different characteristics:
1. Sampling for visual & dimensional characteristics
- Individual brick characteristics like shape & edges
- Dimensions of Bricks checked for 20 bricks and averaging the results
2. Sampling for physical characteristics
Following physical parameters are checked with the sample set:
- Compressive Strength of Clay Bricks
- Water absorption criteria of Clay Bricks
- Efflorescence in Clay Bricks
---- The End ----
Did you like the article? Please let me know.
Have a wonderful day!
Kushal @ Civil Black Box