DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   General DIY Discussions (http://www.diychatroom.com/f2/)
-   -   thickening the consistency of concrete & does aerated concrete come in a powder (http://www.diychatroom.com/f2/thickening-consistency-concrete-does-aerated-concrete-come-powder-6431/)

artist1 02-11-2007 03:11 AM

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

concretemasonry 02-11-2007 09:58 AM

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.

joed 02-11-2007 10:46 AM

Stiffnes of concrete is controlled by how much water you add.

concretemasonry 02-11-2007 12:47 PM

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.

Tscarborough 02-12-2007 12:54 PM

The repair mortar they sell with AAC block is composed of ground AAC, plus binders, but it will not be aerated, of course.

yogia 02-25-2007 10:01 PM

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

joed 02-26-2007 05:53 PM

Quote:

Originally Posted by concretemasonry (Post 33094)
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.

yogia 02-28-2007 09:09 PM

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


All times are GMT -5. The time now is 05:49 PM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved