What is the main purpose of 'base course' in construction?

The primary purpose of the base course in construction is to distribute loads and provide drainage. The base course serves as a crucial layer in the overall pavement structure, creating a stable foundation that can withstand the loads imposed by traffic and other structures. By effectively distributing these loads across a broader area, the base course helps to reduce stress on the underlying ground and prevents settling or deformation over time.

Additionally, a well-designed base course contributes to drainage by allowing water to move through it, reducing the risk of water accumulation that could lead to soil erosion or weakening of the pavement structure. Efficient drainage is vital for maintaining the integrity of the infrastructure and preventing damage caused by water infiltration.

While base courses do contribute indirectly to erosion prevention and can play a role in stormwater management through effective drainage, the most direct and significant roles are in load distribution and the facilitation of water movement. This comprehensive function makes the base course a critical component of construction in ensuring longevity and stability.