CHENG’s Pro-Formula Concrete Countertop Mix is an all-in-one formulation designed to take the guesswork out of measuring and mixing multiple ingredients to make pre-cast concrete countertops. This guide shows you to how to blend the ideal countertop mix using CHENG Pro-Formula Concrete Countertop Mix and Sakrete 5000 Plus Concrete Mix.
Pro-Formula Concrete Countertop Mix is ideal for most pre-cast concrete projects.
Manufactured with high-quality iron oxide pigments developed to provide vibrant, stable, long-lasting color and improve the look and texture of concrete countertops.
Yields a stronger, more durable and smoother countertop surface. Special modifiers in the admixture dramatically improve the surface durability of concrete.
Is easier to work with and more forgiving with respect to water requirements.
Concrete Mixers are rated by cubic foot capacity with most popular sizes being 5, 9 and 12 cubic feet. It’s important to note that these capacities are the total volume of the drum, not the amount of material you can mix.
5 cf mixer yields 2.5 cf of mix.
9 cf mixer yields 5-6 cf of mix.
12 cf mixer yields 8-9 cf of mix.
Add One Pro-Formula Concrete Countertop Mix packet for every 120lbs of Sakrete 5000 Plus Concrete Mix. Next, cover the mouth of the mixer with a trash bag and secure with an elastic bungee cord.
Run the mixer for 5-10 minutes to thoroughly blend all the pigments, additives and concrete before the addition of water.
Step 2 – Add the Water
Measure and set aside any water or other liquid ingredients while the dry components are blending.
If you’re using an admixture like CHENG Pro-Formula, follow the instructions on the packaging, NOT the instructions on the bag of concrete mix.
Add just 3/4 of the recommended water to the dry blend and mix.
Since each bag of concrete has different water requirements, we don’t add all the required water at once. You can always add more water if the mix is too dry… but you can’t take water out.
Step 3 – Get the Right Mix Consistency
Run the mixer for 5 minutes after addition of initial water (3/4 of total).
Slowly add the remaining water a little at a time to avoid adding too much. Pay careful attention to the viscosity of the mix.
The ideal mix will not be runny or watery. A simple test that we use is to scoop a handful of concrete out of the mixer and hold it in our hand. The concrete shouldn’t flow between our fingers until we gently vibrate our hand. If the concrete doesn’t flow through your fingers when you shake/vibrate it, then you should probably add more water.
Video – How to Mix CHENG Pro-Formula Concrete Countertop Mix