This ballast bag gives a mixture of sand and stone ballast to be mixed with cement for concreting applications. Also suitable for other building projects such as to provide an even sub-base for driveways, shed bases and more.Skip to main content 20mm All In Ballast or Concreting Ballast as it is sometimes known, is a mixture of sand and gravel to create a coarse aggregate. 20mm Ballast is the standard aggregate for mixing concrete. 20mm Ballast is not suitable for drainage due to high fines content. Widely used in construction and domestic applications.
