All clay bricks used in the building of a wall must adhere to the American Society for Testing Material’s (ASTM's) C216 standard. This doctrine sets the standards a clay brick must meet to be considered sufficient for construction. Using materials you already have in your home, anyone can build a device used to mold and bake your own clay bricks.
Clay bricks are composed of different percentages of sand, clay, silt and water. Percentages can vary from brick type to brick type. However, the difference between sand and clay should range between 30 percent and 50 percent with the brick containing more sand than clay.
Wood and nails are the only material you’ll need to build your own brick mold. Abide by the C216 standard when determining the size of your mold. Beech wood is the best wood to use. Only four pieces of wood are needed, one for each side of the brick. The top and bottom of the mold should be left open.
You can use the oven in your kitchen to bake your bricks. There’s no need to purchase or build your own kiln. If you choose to bake your brick rather than letting it dry out in the sun, bricks will need to sit in your oven for at least seven days at a temperature no hotter than 1,800 degrees Fahrenheit.
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