Heblex block or AAC

Autoclaved Aerated Concrete (AAC) or lightweight concrete block is also called porous concrete. The components of this block are silica, lime, cement, aluminum powder and water.

The production process

In the production line of the AAC block, there are three silos for the storage of silica, lime and cement, which enter into the production line at certain intervals. In the first step, the materials such as silica and water (wet) and lime and cement (dry) are mixed and transferred to the mold section. After chemical interactions, molds are filled and transferred to the foundry line. Molds are coated with mazut to prevent adhesion. After controlling and testing, they are carried out to the cutting line. In order to have a smooth surface, the outer surface of the mold is removed. Depending on the consumer’s demand, first the cutting process is done on width and then it is done on length by cutting machine. After finishing this step, the molds enter to the autoclave section and cook at 200 ° C and under the pressure of 12 atmospheres.

Benefits of the heblex block:

  1. Blocks with light weight, resulting in reduction of materials cost
  2. Thermal insulation
  3. Reduce the consumption of coating materials such as plaster due to the smooth surface of the block
  4. Performing in high speed
  5. Ease of installation and operation
  6. Saving on using steel
  7. Ease of practicality

Disadvantages of the heblex block:

  1. Not economical because of using silica
  2. Insufficient strength and connection to the structure
  3. Used only for non-load-bearing walls
  4. Creates crack by changing seasons
  5. Water absorption, resulting in cracks and heavy structure
  6. Product decomposition in confronting with moisture
  7. Reduced product resistance in confronting with water
  8. Not suitable for wet weather conditions
  9. High energy consumption, resulting in damage to the environment
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