By: Allison Carlisle MEEN-3344. What is it? Autoclaved aerated concrete(ACC) is a porous,...
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By: Allison Carlisle MEEN-3344. What is it? Autoclaved aerated concrete(ACC) is a porous, lightweight, concrete-like material made with many small aggregates
What is it? Autoclaved aerated concrete(ACC) is a porous,
lightweight, concrete-like material made with many small
aggregates. AAC is 80% air. It can weigh about 1/6 to 1/3 as much
as normal concrete and can be just as strong with reinforcement and
a protective finish. Where? How long in use?
Slide 3
How its Made Raw materials such as limestone, water, sand, and
often fly ash are mixed with cement. A reactive expansion agent
such as aluminum powder is added to create air bubbles and cause
expansion. The mixture is poured in large molds with After it sets,
it is wire cut into precisely sized blocks and then baked.
Reinforcement is placed within the molds prior to the curing. It is
then baked to speed up the curing process and help maintain their
dimensions.
Slide 4
How its Made
Slide 5
Properties Density: 20-50 lbs. per cubic ft. Compressive
strength: 300-900 psi Allowable Shear stress: 8-22 psi Thermal
resistance: 0.8-1.25 in. of thickness
Slide 6
Uses AAC combines insulation and structural capability for
floors and roofs. Its light weight properties make it easy to cut,
size, and adjust for complex jobs Its a cement-based material, so
it can resist water, mold, insects, and is mostly fire
resistant.
Slide 7
limitations Made in rigid, pre-sized panels Because it has a
lower strength in most load-bearing applications, it is typically
reinforced. Also requires a protective finish since it is a porous
material and would deteriorate if left exposed. (usually a
stucco-type finish) Not readily available in America but can be
easily shipped
Slide 8
Applications and cost Commonly used in everyday buildings such
as commercial and residential places. Also can be used for thermal
insulation, plumbing and electrical conduits. Ensures structural
integrity and tightness. Cost can be expensive varying from the
size needed and distance that it has to be shipped
Slide 9
Summary Its a light weight It is versatile and durable. Easy to
adjust and size if mistakes or changes are made Great for complex,
and smaller jobs such as plumbing areas.