SAND MIX 80 lb Ace-Crete Sand Mix is extremely tough and durable, gravel mix is the combination of Portland cement, graded sand and stone gravel. This mixture can be used to reliably and safely secure important pool and landscape fixtures. It can also be used in larger projects such as patio construction around pool area, or walkways/pathways. Gravel mix can be relied upon to fill unwanted cracks and breaks in asphalt by adding mix with water as directed.