AAC Blocks also known as autoclaved cellular concrete ( ACC ) or autoclaved lightweight concrete ( ALC )  , was invented in the mid-1920s by the Swedish architect and inventor Johan Axel Eriksson. It is a lightweight, precast building material that simultaneously provides structure, insulation, and fire and mold resistance. AAC  Blocks are a unique and excellent type of building materials due to its super heat, fire and sound resistance, AAC blocks is lightweight and offers ultimate workability, flexibility and durability. Its main ingredients include flyash, water, quicklime, cement and gypsum.

The chemical reaction due to the aluminum provides AAC its distinct porous structure, lightness, and insulation properties, completely different compared to other lightweight concrete materials. After mixing and molding, it is then autoclaved under heat and pressure to create its unique properties. AAC has excellent thermal insulation and acoustic absorption properties. AAC is fire and pest resistant, and is economically and environmentally superior to the more traditional structural building materials such as concrete, wood, brick and stone.
This product has unlimited constructional possibilities and good building physical properties. It is, for example: non-flammable, impermeable to frost and moisture and has excellent insulating properties.

Above all, however, it is quick and efficient to lay. In practice, this is a decisive argument for contractors to use aerated concrete, as this results in a high speed construction. These blocks are not only used to construct inner leaves of cavity walls and dwelling partitioning walls but also internal, external and fire walls in both load-bearing and non load bearing designs. The building block therefore is known as being efficient for both house construction and for commercial and industrial buildings. In addition to its versatility, this AAC block is characterized by its ease of working and construction. The blocks can easily be sawn. This results in a relatively high construction speed which can deliver cost savings, particularly in high-volume projects.The construction advantages of the AAC block are that it is light-weight, simple to lay, quick to assemble, simple to saw/cut and chase and it has unlimited finishing possibilities.
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