Graphical Construction Glossary >> Concrete and Concreting. >> >> Autoclaved Aerated Concrete
Recognised as being highly thermally and acoustically efficient products made with AAC are gaining awards for being "Eco friendly". They are getting popular with major construction companies and owner builders alike because of their ease of use and labour saving potential.
Something like 80% of the total product comprises air voids and you can imagine that quite large pieces can be handled safely by one person.
The Portland cement, sand, lime, gypsum and lesser material is mixed as a slurry with powdered aluminum. This reacts with the cement and lime to produce hydrogen bubbles which increase the volume by about five times.
This is done in large long forms and when the material is set, it is removed from the forms, cut to the desired shapes and cured in an autoclave.
Hebel in Australia list the following uses of Autoclaved Aerated Concrete.
The DIY find these AAC products particularly inviting because they can be cut to shape with ordinary hand saws and other cutting tools.
One last point is that houses using these products rate well in bush fire prone areas and the fact or their good fire safety rating is a plus for all homeowners wherever the location
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