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Ready Mix Supplies

Length - 04:21

Award-winning designer Fu-Tung Cheng shows us the types of mixers he uses and discusses the key features to look for when buying or renting a mixer for making concrete countertops.

It's a misnomer to think that all the material needed for a concrete countertop can be mixed in a wheelbarrow. Cheng recommends either buying or renting a professional concrete or mortar mixer when making concrete countertops. Mixers come in a variety of sizes. Cheng has used a variety of mixers including a 3 cubic foot, 12 cubic foot, and 14 cubic foot.

Remember, the size of the mixer (the one given by the manufacturer), is not how much concrete material it will mix. The manufacturer is providing the entire capacity of the mixing drum. In a 14 cubic foot mixer for example the most material that should be mixed is 10 cubic feet. This would be approximately 18 fifty-pound bags of concrete mix. With at 3 cubic foot mixer it is safe to only mix about 2 bags per batch.

When renting or buying a concrete or cement mixer, consider using a gas-powered mixer. These can be used on jobsites without any power. Make sure that the gas-powered mixer is not used indoors. The fumes from the gasoline need to be vented properly. When mixing indoors due to space requirements or weather, be sure to use an electric concrete mixing machine.

Be safe when using any concrete mixers. Do not stick your hands or head inside the moving drum. Make sure clothing items cannot get caught in the mixing drum. Be sure to wear the proper eye protection, respirator, and gloves as concrete dust can be detrimental to a person's health. Concrete is a caustic material and will burn the skin if not properly protected.

Before starting the mixer, place the mix and any admixtures that may be needed inside the mixing drum. Then start the mixer and slowly add the specific amount of water recommended by the mix manufacturer. Be sure to mix the concrete long enough so that all the aggregate, fiber, color, water, etc. are thoroughly mixed together.