What Concrete Mix to Use for Stamping?

For stamping applications, he advises a 5.5 to 6.5 bag per cubic yard ratio, with a 50/50 sand and aggregate ratio, and a 3⁄4-inch aggregate. In exposed aggregate applications, he advises a 70/30 or 60/40 sand-to-aggregate ratio, with a 3⁄8-inch rounded aggregate.