6F2 is classified as a material that is sourced, produced and used on site where as 6F5 is a material that is imported to the site. The material is an unbound, coarse recycled aggregate made from crushed hardcore and concrete to dust, It can be used as bulk fill to build up levels, as a temporary hard standing, for firming up soft or wet ground or for use as a layer below Type 1 crushed/primary.
