Road Base Crushed Concrete – Bulk (Driveways, Construction, Base Material) | Mulch and StuffRoad Base Crushed Concrete Bulk (Driveways, Construction, Base Material) Mulch and Stuff Road Base (Crushed Concrete) is a processed, compactable aggregate used for base layers in construction and site preparation. It is made from recycled concrete that has been crushed and screened to create a stable, load bearing material. This material is commonly used in residential and commercial projects where durability, compaction, and long term performance