How to make foamed concrete brick by using concrete foaming machine
Foam concrete is a lightweight concrete that is made by mixing cement, sand, water, and a blowing agent. Foaming agents create air bubbles in the mixture, reducing the density of the concrete and making it easier to work with. Foamed concrete is commonly used for insulation, to fill voids, and to make lightweight blocks and bricks. Here are the steps to make foam concrete bricks with a concrete foaming machine:
1. Prepare materials: You need cement, sand, water, and foaming agent. The proportion of materials will depend on the desired density of the foamed concrete. The typical ratio is 1:2:3 (cement: sand: water), and the amount of foaming agent added is 0.5-2% of the cement weight.
2. Mixing materials: Mix dry materials (cement and sand) in a mixer until they are well mixed. Add water to the blender and continue blending until a homogeneous mixture is obtained. Then, add the blowing agent to the mixer and mix for another 2-3 minutes.
3. Foam the mixture: Transfer the mixture to a concrete foaming machine. The machine injects air into the mixture, creating foam. The foam will expand and fill with the mixture, reducing its density. The foam machine will also mix the foam and the mixture, making sure they are well bonded.
4. Pour the mixture into the molds: Once the mixture foams, pour it into the molds. Molds can be made of wood, plastic or metal. The mold should be slightly larger than the ideal size for foam concrete bricks, as the mixture will expand slightly as it sets.
5. Let the blocks set: Allow the foam concrete blocks to set for at least 24 hours. After the cement sets, the bricks harden. Once the bricks have set, remove them from the mold and allow them to cure for another 7-14 days before using.
Foamed concrete bricks made with concrete foaming machines are lightweight, durable, and easy to handle. They are used in various applications including insulation, filling voids, and making light walls and partitions.