manufactured from autoclaved aerated concrete (AAC).
creating a chemical reaction which creates a mico-cellular structure giving aircrete blocks their unique thermal and lightweight properties.
that requires a unique blend of raw ingredients in a carefully controlled environment.
for combined thermal performance and strength
overall of your build and reduce heat loss
of raw materials including cement, pulverised fly ash (PFA), silt, sand, aluminium and lime are blended together to create a wet mix.
The mixture is poured into large oiled moulds and vibrated to remove excess air bubbles.
The mould is transferred to a pre-curing chamber, where it remains for a period of 2-2.5 hours at 36°C – 40°C.
A chemical reaction takes place between the aluminium and the lime releasing gases which fills the mixture with millions of tiny air pockets, causing the mix to rise and giving the block its lightweight and thermal properties.
The now solid mixture is removed from the mould and tilted before individual blocks are cut using piano wires. Excess material is recycled for use in the next mix to minimise waste.
The cake is steam cured in an autoclave for 12 hours in a very controlled environment. The temperature increases slowly, is held at 180°C for several hours, before gradually declining. Unlike dense or lightweight aggregate blocks which take up to 28 days to reach full strength, Mannok’s aircrete thermal blocks achieve full design strength during this autoclaving process.
Blocks are separated and packaged, with samples from every batch undergoing multiple tests over 48 hours to ensure strength and thermal properties meet their specific requirements.