Crushed rock, gravel, or other manufactured aggregate used to create a stable foundation for paved surfaces in close proximity to the individual constitutes the focus. This foundational layer distributes the load from the surface pavement, mitigating stress on the underlying subgrade and preventing premature failure. An example includes a compacted layer of crushed limestone beneath asphalt on a residential street.
The utilization of appropriate subbase significantly extends the lifespan of roadways, parking lots, and other paved areas. Proper installation reduces maintenance costs associated with potholes, cracking, and deformation. Historically, locally sourced materials were commonly employed, however modern specifications often require materials meeting specific gradation and strength criteria to ensure optimal performance and durability.
