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A shrinkage joint, or control joint is a separation cut with a finishing handtool into wet concrete sidewalks to 1/4 of the depth of the concrete. Since concrete shrinks a tiny bit as it cures, little tiny cracks may develop . . . the shrinkage joints make those cracks appear in the nice straight joints, thus improving the looks of the new concrete walk.

Shrinkage joints may also be cut in after the concrete has cured long enough to stand on (several hours) with a concrete-cutting saw.

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14y ago
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5mo ago

A shrinkage joint is a specialized joint used in concrete construction to control cracking caused by shrinkage as the concrete dries and cures. It is created by inserting a material that can compress or be removed to allow for movement without causing cracks in the concrete.

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