11. It can be mixed into new pavement or used as a subbase or fill material. 12. The building was located in Subbase . 13. Subbase is the layer or successive layers of stone, gravel and sand supporting the pavement.14. Sometimes, a slightly different definition of subbase is given which requires that the subbase cover. 15. Sometimes, a slightly different definition of subbase is given which requires that the subbase cover. 16. If there is a subbase course, the base course is constructed directly above this layer. 17. These piles are then crushed to provide subbase for roads and driveways, among other purposes. 18. Modern pavements are designed for heavier vehicle loads and faster speeds, requiring thicker slabs and deeper subbase . 19. Permeable subbase courses are becoming more prevalent because of their ability to drain infiltrating water from the surface. 20. A subbase of is usually defined as a subcollection of satisfying one of the two following equivalent conditions:
