Having a road with a strong foundation start there, the foundation. A road that will be in for the long all, starts with a road that has been properly designed and a properly constructed baselayer. Pavement doesn’t simply get placed with nothing underneath.
In a recent article from Pavement Interactive they lay out the basics on what builds a solid road, from the ground up. The first base layer they dive into is Aggregate Base Layers.
“Aggregate refers generally to granular materials such as sand and gravel that are used in pavement construction. Used by themselves, aggregates are commonly utilized as a base course, subbase, or embankment underneath the surface layer. These layers rest directly on the subgrade (the native soil or fill material on which the pavement structure is built) and provide additional support to the structure. When mixed with asphalt binder or portland cement concrete (PCC), aggregates are a significant component of pavement surface layers as well.”