GSB stands for Granular Sub Base, a type of road construction material used as a foundational layer in pavement structures. GSB consists of a mix of crushed stones, gravel, and sometimes sand, which is compacted to provide a stable base for subsequent layers of the road. It helps in distributing the load from the surface layers and provides drainage.
What is the difference between GSB and WMM?
The difference between GSB (Granular Sub Base) and WMM (Wet Mix Macadam) lies in their composition and application. GSB is a foundational material used primarily to provide stability and support to the pavement structure, often consisting of a coarser mix of aggregates. WMM, on the other hand, is a finer mix that includes crushed stone and sand, mixed with water, and used as a base layer. WMM provides better load distribution and improved durability compared to GSB due to its more compacted and cohesive nature.
GSB is used primarily as a base layer in road construction. It provides a stable foundation for the upper layers of the pavement and helps in distributing the load from the surface. GSB also improves drainage and prevents the upward movement of moisture into the pavement structure, which enhances the overall durability of the road.
GSB and WBM (Water Bound Macadam) are not the same. GSB is a granular base material used as a foundational layer in road construction, while WBM is an older method of road construction where a mixture of crushed stones and water is used to create a stable base. GSB provides better performance and durability compared to WBM due to its more controlled material properties and compaction.
WMM (Wet Mix Macadam) is generally considered better than WBM (Water Bound Macadam) for several reasons. WMM offers improved strength, durability, and load distribution due to its more refined and thoroughly mixed materials. WMM provides a more stable and cohesive base layer, leading to better performance and longer-lasting roads compared to the traditional WBM method.
