Sampling is carried out as per

IS 5454_1978_Reff2020.pdf 368.45 KB

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

1. Sampling in motion: Collecting samples randomly when bricks are being moved

2. Sampling from Stack: Collecting samples from existing stacks by dividing the stack into imaginary sections and selecting randomly

3. 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

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