1. Sample Preparation: Collect the representative samples of bricks. 
2. Setting Up the Compression Testing Machine: Ensure that the compression testing machine is calibrated.  
3. Applying Load: Start applying the load gradually.  
4. Recording the Results: Note the maximum load applied just before the failure of the brick.

Brick comression testing machine involves subjecting the bricks to a compressive load until they fail. The procedure typically follows the guidelines provided by standards such as ASTM C67 (Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile) or ISO 5011 (Testing of Bricks — Compressive Strength). Here's a general overview of the process:

1. Specimen Preparation: Select representative bricks from the sample and prepare them for testing. This may involve removing any irregularities or damaged portions to ensure a flat and even surface for load application.

2. Conditioning: Prior to testing, condition the bricks to a specific moisture content or dryness as specified by the testing standard. This step ensures consistent moisture conditions for accurate and comparable results.

3. Test Setup: Place the brick specimen on the lower platen of a compression testing machine. Align the specimen so that the load is applied axially and uniformly. It is essential to ensure proper alignment and prevent any eccentricity of the load.

4. Load Application: Gradually apply a compressive load to the brick specimen at a specified rate, typically measured in kilonewtons per second (kN/s) or pounds-force per second (lbf/s). The load is increased until the brick fails, which is typically indicated by a sudden drop in load or visible cracking.

5. Load and Deformation Measurement: Throughout the test, the compression testing machine measures and records the applied load and the corresponding deformation or displacement of the brick specimen. This data is crucial for calculating the compressive strength.

6. Compressive Strength Calculation: The compressive strength of the brick is calculated by dividing the maximum load at failure by the cross-sectional area of the brick. The cross-sectional area is typically determined by measuring the dimensions of the brick, such as length and width, using calipers or a measuring device.

It is important to note that specific testing standards may have variations in the testing procedure and calculations. It is recommended to refer to the applicable standard and strictly follow its guidelines to ensure accurate and consistent results.

By testing bricks for compressive strength, their load-bearing capacity and ability to withstand applied loads can be determined. This information is critical for construction projects, where bricks are used as structural elements or as part of masonry units.