This won’t be THE list, but it is a list of the mixes I use the most. There are hundreds more and as you gain experience you will develop your own mixes.
For ornamental concrete casting, you can forget about “standard” mixes. There is a lot added to them. You want a fine blend that brings out the details.
Always mix the dry parts first and then add the water.
CONCRETE
Here are some to get you started…
I – This is the one I use the most.
1 – cement
3 – sand
Sufficient water to obtain a pourable mix. Like pancake mix.
You can change this to 2 parts sand if your mold has very fine details. A better way is to try to get finer sand and stick with the 3 part mix.
II – for steps, curbs and anything subject to heavy traffic use this:
1 – cement
2 – sand
3 – added.
Enough water to get a thick mixture. This is the “standard” mix.
This should just stop. If you have to take it out, that’s fine.
HYPERTUFF
I love these things…
My favorite mix is…
I-
1 – cement
1 – peat
1 – sand
Enough water to obtain a mixture that you can scoop up and form into a ball.
A couple of notes:
When you buy peat, make sure it doesn’t have fertilizer added to it. Some do, and it won’t heal properly.
I have found that it is best to soak peat overnight.
II-
You can replace the peat with potting mix. Make sure there is no fertilizer. The potting mix contains perlite and creates an interesting textured surface.
III-
1 – cement
1 – Vermiculite
1 – sand
1 – peat
This is a really nice mix with an interesting surface when dry.
I have used wood shavings, shredder paper, sawdust, and even grass clippings.
Anything dry I always soak it for at least 12 hours before using it.
Copyright © 2005 Delmar Germyn All rights reserved.
