Can’t seem to get the right mixture
To start off I weighted the foam and it was 3oz for 1 quart. I then added 94lb bag of type 1/2 Portland to 7 gallons of water. I mixed thoroughly. I then added the foam up to about 30” high. Again mixing thoroughly all the way up. I then poured the mixture into my molds. It’s been about 18hrs and it is still soft. When does it began to harden? Did I not mix enough? Does it need to cure longer? Thanks
I saw your post earlier when I was just starting to make sample blocks of Aircrete.
So I cheated and asked a friend to make a spreadsheet for concrete amounts 10lbs and under since this part can be a bit tricky.
The batch recipe used for batch number 1 was 5.22 LBS Portland CPC-30R, 3.22 LBS water and 1.56 LBS foam.
Will let you know how it works out.
It has been 36 hours since making the blocks with the 5.22LBS cement recipe above. Molds used included tin trays, styrofoam bowls, and styrofoam blocks (bought at home depot). Result: The only viable blocks were the ones that we poured in the porous styrofoam blocks because the water was sucked out of the blocks which enabled the blocks to harden.0_1518887153409_aircrete blocks.jpg
Hi, i am new to this site but very interested in aac and have been for quite some time.
Can you inform me as to the dimensions of your molds (LengthxWidthxHeight)? I am sure that maximizing the surface area of the pour will make for better drying times. This can be achieved with smaller pours into the same mold over a few days?
I do not own a machine but you do! If you would not mind i would love to use you to collect data while you perfect the mixture.
- if you save a small amount in a tupperware container and close it, how long can it last in a liquid form (incase you wanted to save some)