Driveways & Paving

raised crushed rock driveway built on sand

Anonymous user 23/02/2024 - 2.56 PM

Hello. We needed to build a driveway from a forest track road to where our new house will be built. The area is close to the beach and the area is pine forest on a predominantly sand ground. The road we required was built over pure sand. The road was build using a 15 cm layer of crushed limestone rock of around 50mm grade. This was placed on a plastic sheet I believe to avoid vertical motion of material. The top layer was a 0-2mm grade granite material of around 5cm thickness. The problem is that the road at its edges is around 15-20cms above the general sand ground level and the road side easily crumbles just by walking on the edge. The material of the road has been rolled by machine but the edges are still not very well compacted. Is this correct or does the road edge require more support or bonding? Maybe this is normal and in time the gradient of material at the road edge will reduce down to something more stable. The top material is also quitre loose - I can easily scrape away with my finger! Thanks for any help you can give