Road base is a layer of material placed on top of the subgrade, which serves as a foundation for the construction of a road. It provides support and stability to the surface layer of the road and helps to distribute the weight of vehicles evenly. The quality of road base material is crucial for the durability and longevity of the road.
Difference between 2.1 and 2.3 road base: Road base is classified based on the size of the particles that make up the material. Two common types of road base are 2.1 and 2.3. The primary difference between them lies in their particle size distribution and the materials used to produce them.
- Particle size distribution: The particle size distribution of road base material is significant in determining its strength, stability, and permeability. Road base 2.1 has a maximum particle size of 37.5mm, and at least 90% of the material must be within the range of 6mm to 37.5mm. In contrast, road base 2.3 has a maximum particle size of 75mm, and at least 90% of the material must be within the range of 6mm to 75mm.
- Materials used: The materials used to produce road base 2.1 and 2.3 also differ. Road base 2.1 is typically made from a combination of crushed rock, gravel, and sand, while road base 2.3 is typically made from crushed rock only.
- Usage: Road base 2.1 is commonly used for roads that carry heavy traffic, such as highways and major roads. It provides excellent support and stability for the surface layer of the road. Road base 2.3, on the other hand, is commonly used for lower traffic roads, such as residential streets, driveways, and footpaths.
Conclusion: In summary, the primary difference between road base 2.1 and 2.3 lies in their particle size distribution and the materials used to produce them. Road base 2.1 has a smaller maximum particle size and is made from a combination of materials, while road base 2.3 has a larger maximum particle size and is made from crushed rock only. The choice of road base material depends on the intended usage and the level of traffic the road will carry.