Gravel
Gravel and sand are used for road surfaces, and for cement and Tarmac. Mixtures of gravel and sand mixed with various crushed material, are known as aggregate in the trade. This is used for drainage in the basement of roads, and other purposes. Mixture of stones and resin is also used to pave footpaths, driveways, etc. This mixture is known as Resin Bonded Gravel.