Procedure - Presentation

Put on a dust mask and rubber or vinyl gloves before mixing and handling the wet concrete.
Mix batches of concrete using sand and Portland cement into different ratios in a bowl.
Add water and mix thoroughly, then pour into molds to make 3 - 4 bricks.
Then, place the concrete solution in the molds (trays) and label them accordingly to their mixture.
Allow the bricks to set for at least 2 days.
Then dissemble bricks from their molds, and test them.
To test the bricks, you will have to get a weight scale and get a single table, and put it upside down next to the weight scale.
Put a long piece of wood through the table, and another piece of wood over it loosely.
Then place two small pieces of wood on the weight scale and put the brick over it.
Apply force by hand, and pay attention to how much weight it held, and record the data.