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How do you manually make hollow blocks?

Time: February 21, 2023  |  Source: HF Machinery

Hollow blocks, also known as concrete blocks, are commonly used in construction for building walls, foundations, and other structures. Here are the general steps to manually make hollow blocks:

  1. Prepare the mold: Construct a mold from wood or metal that is the desired size and shape of the hollow block. The mold should have a removable bottom or top to allow for easy removal of the block once it has been formed.

  2. Mix the concrete: Mix the concrete according to the manufacturer's instructions. The mixture should be a combination of cement, sand, and gravel or crushed stone. Water should be added slowly to achieve the desired consistency. Aim for a consistency that is wet enough to pour but not too runny.

  3. Fill the mold: Pour the concrete mixture into the mold, filling it to the top. Use a shovel or trowel to level the top of the mixture.


  1. Insert the block-forming material: Place the block-forming material, such as a wooden or metal form, in the center of the mold. This will create the hollow space inside the block.

  2. Add reinforcement (optional): If desired, add reinforcement, such as steel bars or wire mesh, to the center of the block to increase its strength.

  3. Remove the mold: After the concrete has cured, remove the mold by loosening the sides and lifting the mold off the block. If the mold has a removable bottom, gently push up from the bottom to release the block.

  4. Cure the block: Allow the block to cure for at least 28 days before using it in construction. Keep the block moist by covering it with plastic or spraying it with water periodically during the curing process.

  5. Repeat: Repeat the process to create as many blocks as needed for your project.

Note: Always wear protective gear, such as gloves and a mask, when working with concrete to prevent skin and respiratory irritation.


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QT4-26


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