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Autoclaved aerated concrete
Autoclaved aerated concrete (AAC), also known as autoclaved cellular concrete (ACC), autoclaved lightweight concrete (ALC), autoclaved concrete, cellular concrete, porous concrete, Aircrete, Hebel Block, and Ytong is a lightweight, precast, foam concrete building material invented in the mid-1920s that simultaneously provides structure, insulation, and fire- and mold-resistance. AAC products include blocks, wall panels, floor and roof panels, cladding (facade) panels and lintels.
History
AAC was perfected in the mid-1920s by the Swedish architect and inventor Dr. Johan Axel Eriksson,working with Professor Henrik Kreüger at the Royal Institute of Technology.The process was patented in 1924. In 1929, production started in Sweden at the city of Yxhult. From "Yxhults ?ngh?rdade Gasbetong" later became the first registered building materials brand in the world: Ytong. Another brand “Siporex” was established in Sweden in 1939 and presently licenses and owns plants in 35 locations around the world. The second major international cellular concrete Hebel brand goes back to company founder and technicians Josef Hebel from Memmingen. In 1943, the first Hebel-plant was opened in Germany.
In 1978 The Swedish team of Siporex Sweden opened the Siporex Factory in Kingdom Saudi Arabia - the "Lightweight Construction Company - Siporex - LCC SIPOREX" which have supplied the Middle east and Africa and Japan by most of its need . The LCC SIPOREX FACTORY is operating for more than 40 years . Today aerated concrete is produced in many companies, particularly in Europe and Asia. There is some production in the Americas, and in Africa there is one plant in Egypt. AAC production in Europe has slowed down considerably, but the industry is growing rapidly in Asia due to strong demand in housing and commercial space. China is now the largest aircrete market in the world with several hundred factories. China, Central Asia, India, and the Middle-East are the biggest in terms of AAC manufacturing and consumption.
Uses
AAC is a highly thermally insulating concrete-based material used for both internal and external construction. Besides AAC's insulating capability, one of its advantages in construction is its quick and easy installation, because the material can be routed, sanded, or cut to size on site using standard carbon steel power tools.
AAC is well suited for urban areas with high rise buildings and those with high temperature variations. Due to its lower density, high rise buildings constructed using AAC require less steel and concrete for structural members. The requirement of mortar for laying of AAC blocks is reduced due to the lower number of joints. Similarly, the material required for rendering is also lower due to the dimensional accuracy of AAC. The increased thermal efficiency of AAC makes it suitable for use in areas with extreme temperatures, as it eliminates the need for separate materials for construction and insulation, leading to faster construction and cost savings.
Even though regular cement mortar can be used, most of the buildings erected with AAC materials use thin bed mortar in thicknesses around ? inch, depending on the national building codes. AAC materials can be coated with a stucco or plaster compound to guard against the elements, or covered with siding materials such as brick or vinyl.
Advantages
Environment protection: The first Advantage of Autoclaved Aerated Concrete (AAC) is designed for consumers who are environmentally conscious. It helps reduce at least 30% of environmental waste, decrease over 50% of greenhouse radiation and over 60% integrated energy on the surface of brick.
Energy saving: The remarkably good insulation properties of Autoclaved Aerated Concrete (AAC) mean a pleasant interior environment is achieved. In most cases the need for supplementary insulation can be avoided.
Excellent acoustic performance: Autoclaved Aerated Concrete (AAC) has excellent acoustic performance and can be used as an effective sound barrier, e.g., intertenacy walls (aac wall panel).
Fire resistant: This Advantage of Autoclaved Aerated Concrete (AAC) is totally inorganic and is incombustible. The product is especially suited for fire-rated applications.
Ventilation: Autoclaved Aerated Concrete (AAC) is very airy thus allowing more diffusion of water, reducing humidity of the building. TRIEU CUONG AAC Wall self-adjusts the humidity by absorbing moisture and releasing humidity automatically, helps prevent condensation and problems related to mildew.
Non toxic: Autoclaved Aerated Concrete (AAC) products do not contain any toxic gas substances. The product does not harbour or encourage vermin.
Lightweight: Autoclaved Aerated Concrete (AAC) blocks are one-fifth of the weight of concrete and are produced in easily handled sizes.
Accuracy: The accurate manufacturing process ensures that Autoclaved Aerated Concrete (AAC) panels and blocks are always produced to size as they leave the factory. This results in less on-site trimming and reduced quantities of mortar and finishing materials use.
Long life: Autoclaved Aerated Concrete (AAC) products are not affected by harsh climatic conditions and will not degrade under normal atmospheric conditions.
Rapid on - site essembly: The Autoclaved Aerated Concrete (AAC) product’s lightweight and easy workability means that is very quick to install on site.
Product execution standards：
GB11968-2006《蒸壓加氣混凝土砌塊》
GB15762-2008《蒸壓加氣混凝土板》
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