Mixing latex paint with concrete is not a new concept, but it has achieved new popularity as a way for cities to safely dispose of discarded paint. However, homeowners can also use the technique of mixing latex paint with concrete to get some of the less apparent benefits.
If you like to cast concrete into molds, for example, latex paint added to the mix will ensure that the concrete will hold better detail. There is also some evidence that latex paint will increase the strength of concrete. However, there is a limit to the amount of latex paint that can be added before the strength of the concrete is adversely added.
If you are using paint that is a different color than the concrete, the color of the concrete will be affected. However, the amount of latex paint added ensures that this color is only a light tint.
Step 1: Place the dry concrete mix in a wheelbarrow or other container you use for mixing concrete. If you are using part of a bag of concrete, be sure how much concrete mix you are using: the ratios for this project are important.
Step 2: Place 80 percent of the water required for the concrete mix into a separate bucket. The manufacturer of the concrete mix should indicate the correct ratio of water to concrete mix on the bag.
Step 3: Add the remaining 20 percent of the liquid required in latex paint to the bucket that contains the water.
Step 4: Add an additional 10 percent of water called for by the concrete mix to the bucket. Although this will mean you have exceeded the called for amount of water by 10 percent, this extra amount of water will make up for the lack of water in the paint. This ratio will still create the correct chemical reaction that will cause the paint to harden.
Step 5: Mix the water and paint thoroughly together.
Step 6: Add the water and paint mixture to the dry concrete mix. Mix the two together thoroughly, until
the concrete mix is thoroughly moistened.
Step 7: Place the concrete in its mold or other intended use. Proceed with your project like you would if you were using standard concrete.