ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 61, (1) 45 - 51 (2017)


PREPARATION OF ULTRA-LOW VOLUME WEIGHT AUTOCLAVED AERATED CONCRETE
 
Koutný Ondřej, Kratochvíl Jiří, Opravil Tomáš
 
Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno

Keywords: Aerated concrete, Foam stability, Optimization, Low volume weight
 

Autoclaved aerated concrete is a modern construction material that gains its popularity especially due to its thermal insulation performance resulting from low volume weight and porous structure with sufficient mechanical strength. Nowadays, there are attempts to use this material for thermal insulation purposes and to replace current systems, which have many disadvantages, mainly concerning durability. The key for improvement of thermal insulation properties is therefore obtaining a material based on autoclaved aerated concrete with extremely low volume weight (below 200 kg/m ³) ensuring good thermal isolation properties, but with sufficient mechanical properties to allow easy manipulation. This material can be prepared by foaming very fine powder materials such as silica fume or very finely ground sand. This paper deals with the possibilities of preparation and summarizes the basic requirements for successful preparation of such a material.


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doi: 10.13168/cs.2016.0059
 
 
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