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Old 02-11-2007, 04:11 AM   #1
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thickening the consistency of concrete & does aerated concrete come in a powder


or only in blocks. I want to make a scupture using concrete or the new enviro friendly aerated concrete or even plaster and it needs to be the same consistency as clay. Does anyone know the right mixes to use. aerated concrete is mixed with lime

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Old 02-11-2007, 10:58 AM   #2
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thickening the consistency of concrete & does aerated concrete come in a powder


Aerated concrete is not new. It started in Europe about 50 years ago. As a building material/product, it is still struggling due to incompatibility with American buiding methods. It is available in blocks and panels.

Aerated concrete normally is the result of the materials and a manufacturing process that a DIYer cannot attempt.

Some of the products use aluminum powder as an expanding agent, but use high temperatures (autoclave) to actually cure the material and give it stability.


I am not aware of aerated concrete being mixed with lime, but lime or products with similar chemical composition are used as raw materials to produce most types of aerated concrete.

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Old 02-11-2007, 11:46 AM   #3
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thickening the consistency of concrete & does aerated concrete come in a powder


Stiffnes of concrete is controlled by how much water you add.
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Old 02-11-2007, 01:47 PM   #4
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thickening the consistency of concrete & does aerated concrete come in a powder


joed -

Aerated concrete is not anything like ordinary wet cast concrete. Water has little to do with the "stiffness".

The concrete is aerated(expanded) at the time when it sets. It is a rather quick chemical reaction and not like a typical slow concrete reaction. It rises like a loaf of bread (50% increase in volume). Normally, it is cured at high temperatures and is very dry in its useable form.

Finished aerated concrete can be cut like wood with hand tools (saws, etc.).

artist1 -

You could get solid blocks of aerated concrete, adhere them together and then carve or sculpt, but it will not be the consistancy of wet clay.
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Old 02-12-2007, 01:54 PM   #5
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thickening the consistency of concrete & does aerated concrete come in a powder


The repair mortar they sell with AAC block is composed of ground AAC, plus binders, but it will not be aerated, of course.
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Old 02-25-2007, 11:01 PM   #6
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thickening the consistency of concrete & does aerated concrete come in a powder


Hi artist1:

Just a thought ... Would working with hypertufa be of some interest to you? Have a look at ... http://www.the-artistic-garden.com/h...-beginner.html
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Old 02-26-2007, 06:53 PM   #7
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thickening the consistency of concrete & does aerated concrete come in a powder


Quote:
Originally Posted by concretemasonry View Post
joed -

Aerated concrete is not anything like ordinary wet cast concrete. Water has little to do with the "stiffness".

The concrete is aerated(expanded) at the time when it sets. It is a rather quick chemical reaction and not like a typical slow concrete reaction. It rises like a loaf of bread (50% increase in volume). Normally, it is cured at high temperatures and is very dry in its useable form.

Finished aerated concrete can be cut like wood with hand tools (saws, etc.).

artist1 -

You could get solid blocks of aerated concrete, adhere them together and then carve or sculpt, but it will not be the consistancy of wet clay.
That's a totally different type aerated concrete than I have heard of.

I guess the type I am thinking of is called air entrained. It is used here to help prevent feezing damage in winter.
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Old 02-28-2007, 10:09 PM   #8
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thickening the consistency of concrete & does aerated concrete come in a powder


Hi joed:

In regard to Autoclaved Aerated Concrete which is also known as cellular concrete, porous concrete, aircrete, ...

What you are refering to is air-entrained concrete which is conventional portland cement concrete with 5% to 7% air entrainment

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