soil compaction
Since the soil is frequently loose and insufficiently cohesive, earthworks are required before the base course, binder course and surface course can be laid. Compaction is the most important process in earthworks. The purpose of compaction is to reduce the volume of soil filled with air and water. This gives the soil the desired properties: it becomes more resistant to the stresses imposed by traffic and climate.Nature doesn’t always provide the ideal foundation for the construction of roads: natural rock. In the majority of cases, the ground is unstable, offering insufficient bearing capacity. Earthmoving operations are therefore usually the first step in the construction of a new road. When the course has been defined and set out, the ground underlying the new road needs to be prepared