This document discusses using mineral-blended polymeric microspheres to protect concrete from freezing-thaw damage as an alternative to air entrainment. Microspheres provide freeze-thaw protection by creating annular voids when they expand and contract at different rates than the concrete matrix. However, microspheres tend to agglomerate, requiring higher dosages. Blending microspheres with mineral powder coats the microspheres and prevents agglomeration, allowing the use of microspheres at the minimum effective volume fraction of 1%. Laboratory testing shows concrete with 1% microspheres achieves comparable freeze-thaw durability to air-entrained concrete.