How to Mix Concrete for Molds
A simple way to add beauty to your garden or lawn is to make your own garden path stones, decorative pavers or retainer wall. The shapes can range from simple, as in round or square to more complex such as a butterfly or other creature. The method is inexpensive, easy to do and the mold can be reused many times. Simple shapes can be dressed up by adding color, imprints or glass beads.
You'll need a shovel and something to mix the concrete in. One handy method is to use a concrete barrel mixer. The components are put into the barrel, and you roll it around with your feet to mix it. The more traditional method would be to use a wheel barrel, using the shovel to thoroughly mix the components. A portable mixer can easily be rented if you have a large project.
- Using a light vegetable oil or cooking spray, lubricate the mold so it will easily release.
- Mix the bag of pre-mix concrete according to directions.
- The finished product should be the consistency of cookie dough.
- To test consistency, cut a valley in the cement. If the walls are crumbly, the mix is too dry and water needs to be added. If the valley fills with water, the mix is too wet and more mix needs to be added.
- If you want other than gray stones, add some cement color.
- Pour the concrete into the mold.
- Shake and/or bounce a the mold a bit to level and release air bubbles.
- If using quick setting concrete, you can immediately flip the mold and release the stones. If not, cover the mold with plastic and let it sit a day or so undisturbed on a level surface. Overnight is usually a good length of time.
- For the best results, cover the stones and let them cure for a few days before using them.