In the process of producing Powerblock AAC blocks, quality control is carried out in the laboratory to ensure it meets the DIN (Deutsche Industrie Norm) standard.
Unlike other concrete materials, AAC Powerblock is made using a collection of raw materials with a smaller size than that of a grain of sand. Silica, lime, cement and water are used as binders. Aluminum powder is added at 0.05-0.08% per volume (depending on the desired density).
When the raw aerated concrete mixture is mixed and molded, the chemical reaction that occurs at that stage produces a lightweight material that can act as a temperature insulator. Aluminum powder reacts with the calcium hydroxide in silica sand and water to form hydrogen.
This hydrogen gas forms bubbles. This air bubble enlarges the volume of the block by 2 times. At the end of the process, hydrogen will be released into the atmosphere and replaced with air. Nearly 80% of the volume of AAC Powerblock consists of air which makes it a porous structure resembling cells, and makes this concrete lighter.
When lifted from the mold, AAC Powerblock has a solid shape but is still soft. After being cut into blocks or panels, it is placed in an autoclave room for 12 hours. During the process of hardening with steam, the temperature reaches 190 ° C and the pressure reaches 8-12 bar, the silica would then proceed to react with the calcium hydroxide making the AAC Powerblock very strong. After that, the new AAC Powerblock can be used as a construction material.
In the process of producing Powerblock® AAC blocks, quality control is carried out in the laboratory to ensure it meets the DIN (Deutsche Industrie Norm) standard. Laboratory test results include compressive strength, fire resistance, sound absorption, water absorption, moisture content and shrinkage.
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