Concrete SandSold in 1 cubic yard bags Concrete sand has a multitude of uses, ranging from of course concrete, to bedding pipes and septic systems, used as a base material between a vapor barrier and a concrete slab, for installing paving stones, traction sand for roads and sidewalks, and mixing with topsoil and mulch to create a top dressing material for planting lawns. Concrete sand, and most mortar sands are washed sand products, meaning the dirt in them has