What are the main types of aggregates used in base construction?

The main types of aggregates used in base construction primarily include crushed stone, gravel, and recycled concrete aggregate due to their essential properties and performance characteristics required for stability and compactness in engineering applications.

Crushed stone is typically obtained from quarries and is well-graded to provide good interlocking and load distribution. Gravel, sourced from riverbeds or quarries, offers excellent drainage properties and contributes to a strong, stable base when compacted properly. Recycled concrete aggregate is an increasingly popular choice, as it not only provides strength and durability but also promotes sustainability by utilizing materials that would otherwise be waste.

Overall, these materials are selected based on their ability to meet engineering specifications for strength, drainage, and stability, making them ideal for use in base construction for roads and other infrastructure projects.