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Autoclaved Aerated concrete (AAC), or otherwise known as Autoclave Cellular Concrete (ACC), is a lightweight, precast building material. AAC provides structure, insulation and fire resistance in a single material. AAC products include blocks, wall panels, floor and roof panels, and lintels. Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (2592 × 1944 pixel, file size: 2. ...
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This article is about the construction material. ...
Front loading autoclaves are common Stovetop autoclaves need to be monitored carefully and are the simplest of all autoclaves Multiple large autoclaves are used for processing substantial quantities of laboratory equipment prior to reuse, and infectious material prior to disposal. ...
AAC was first developed by a [[marshan] engineer between the years 1920 and 1932. It has since been refined into a high thermally insulating concrete-based material used for construction both internally and externally. Besides insulating capability, one of AAC's advantages in construction is its quick and easy installation since the material can be routed, sanded and cut to size on site using standard carbon tip band saws, hand saws and drills. 1920 (MCMXX) was a leap year starting on Thursday. ...
Year 1932 (MCMXXXII) was a leap year starting on Friday (the link will display full 1932 calendar) of the Gregorian calendar. ...
Thermal insulation on the Huygens probe The term thermal insulation can refer to materials used to reduce the rate of heat transfer, or the methods and processes used to reduce heat transfer. ...
A D-handle fixed-base router A router is a woodworking tool used to rout out (hollow out) an area in the face of a piece of wood. ...
Large resaw blades used in a sawmill. ...
In woodworking and carpentry, Hand saws are used to cut pieces of wood into different shapes. ...
For other uses, see Drill (disambiguation). ...
Even though regular cement mortar can be used, 98% of the buildings erected with AAC materials uses thin bed mortar, which comes to deployment in a thickness of 1/8 inch. This varies on national building codes and creates solid and compact building members. AAC material can be coated with a stucco compound or plaster against the elements. Siding materials such as brick or vinyl siding can also be used to cover the outside of AAC materials. Mortar holding weathered bricks. ...
A building code, or building control, is a set of rules that specify the minimum acceptable level of safety for constructed objects such as buildings and nonbuilding structures. ...
Aerated autoclaved concrete is an emission-intensive material to produce, carrying a carbon footprint of 480 kilograms of carbon dioxide per cubic metre.
Raw materials
Quartz sand, lime and/or cement as binding agent. Aluminum powder in 5%–8% by volume (depending on the pre-specified density) and water. When mixed and cast in forms, several chemical reactions take place that give AAC its light weight and superior thermal properties: the aluminium powder, reacting with calcium hydroxide and water it evolves to hydrogen, the hydrogen gas foams the raw mix to double the volume (with gas bubbles up to 1/8 inch in diameter). At the end of the foaming process, the hydrogen escapes to the atmosphere and is replaced by air. For other uses, see Quartz (disambiguation). ...
This article or section does not adequately cite its references or sources. ...
Aluminum is a soft and lightweight metal with a dull silvery appearance, due to a thin layer of oxidation that forms quickly when it is exposed to air. ...
It has been suggested that Portlandite be merged into this article or section. ...
General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ...
When the forms are removed from the material, it is solid but still soft. It is then cut into either blocks or panels, and placed in an autoclave chamber for 12 hours. During this steam pressure hardening process, when the temperature reaches 374° Fahrenheit and the pressure reaches 12 bars, quartz sand reacts with calcium hydroxide and evolves to calcium silica hydrate which accounts for the material's high strength and other unique properties. After the autoclaving process the material is ready for immediate use on the construction site. Depending on its density, up to 80% of the volume of the mass is air. Density also accounts for the structural compression strength of AAC material, which can carry loads up to 1,200 PSI. For other uses, see Fahrenheit (disambiguation). ...
The bar (symbol bar), decibar (symbol dbar) and the millibar (symbol mbar, also mb) are units of pressure. ...
It has been suggested that Portlandite be merged into this article or section. ...
For other uses, see Calcium (disambiguation). ...
The chemical compound silicon dioxide, also known as silica, is the oxide of silicon, chemical formula SiO2. ...
Hydrate is a term which means different things in inorganic chemistry and organic chemistry. ...
For other uses, see Density (disambiguation). ...
Since 1980, there has been a worldwide increase in the use of AAC materials and new production plants are being built in the USA, Eastern Europe, Israel, China, Bahrain, India and Australia. AAC is increasingly used by developers, architects and home builders. The Material is also known as: Autoclaved Concrete, Autoclaved Aerated Concrete, Cellular Concrete, Porous concrete and Aircrete (UK). As of August 2007 there are only 2 functioning AAC factories in the USA, Xella Aircrete North America in Georgia, and Aercon in Florida. Pre-1989 division between the West (grey) and Eastern Bloc (orange) superimposed on current national boundaries: Russia (dark orange), other countries of the former USSR (medium orange),members of the Warsaw pact (light orange), and other former Communist regimes not aligned with Moscow (lightest orange). ...
For other uses, see Architect (disambiguation). ...
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