August 11, 2015
Slapwell, an 80 lb bag of QUIKRETE® Concrete Mix yields 0.6 cubic feet of concrete. An application that is 12 feet x 16 feet x 0.167 feet (2 inch) will require 32 cubic feet of concrete, or 53-54 80 lb bags of concrete. Note that typical slabs are 0.33 feet (4 inch) thick, which would require 64 cubic feet of concrete, or 106-107 80 lb bags.Yields will vary based upon waste, uneven subgrade, etc. It is crucial that you have sufficient equipment and man power to allow you to pour the entire application, or sections that are separated by expansion joints, before any of the material in that section has set. If some of the material sets before subsequent bags are poured, a cold joint will form. A cold joint is caused by the inability of the product to intermix between bags, and prevents the slab from being a single, solid mass. A cold joint may cause problems ranging from a simple aesthetic issue, to as serious as potentially allowing for water intrusion into the cold joint, which may eventually lead to concrete degradation. If you have any questions, please call the QUIKRETE® Technical Center directly at 1-800-282-5828.
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