Mortar mixer

Although you can mix the small batches of concrete required for countertops in buckets or a wheelbarrow, a portable mortar mixer is more convenient and will blend ingredients more thoroughly.

Buying tip: "Be aware that the typical mortar mixer doesn't hold the same volume of concrete as the rated barrel capacity. For example, a 9-cubic-foot mixer may only be able to hold about 6 cubic feet of concrete. Also, the stiffer the mix the less material the mixer can effectively blend," notes Girard. Consider buying (or renting) a capacity larger than you think you'll need.

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