Granular Sub-Base layer (GSB)

What is GSB 

In this article, We discussed the what is GSB or Granular sub base layer, its purpose and significance in short.

The GSB layer, or Granular Sub-Base layer, is a foundation layer in road and pavement construction that is typically placed between the subgrade (natural ground or prepared surface) and the base course or pavement layers.

Granular sub base layer

Its purpose is to provide a stable and load-bearing platform for the upper layers of the road or pavement system.

Some more important purposes include.

  • Load Distribution
  • Structural Support
  • Drainage
  • Uniform Surface
  • Construction Efficiency
  • Long-Term Performance

Overall, the GSB layer is a vital component of road and pavement construction, providing structural support, load distribution, drainage, and a stable base for the upper layers.

Its significance lies in its ability to enhance the performance, durability, and longevity of the road or pavement system. 

Proper design and construction of the GSB layer are essential for achieving a high-quality and long-lasting road infrastructure.

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