GSB full form in road construction stands for Granular Sub Base, which is a layer of material that is placed between the subgrade and the base course of a road. GSB is made up of a mixture of materials, such as gravel, crushed stones, or other aggregates. This layer is an important component of road construction and provides several benefits.

Here are some of the benefits of GSB in road construction:

Provides stability to the road:

GSB layer provides a stable foundation to the road. It distributes the load of the traffic evenly, preventing any deformation or damage to the road. The GSB layer also provides good drainage for the road, which helps to prevent waterlogging and reduces the risk of damage to the road due to water accumulation.

Increases the durability of the road:

The GSB layer helps to increase the durability of the road by providing a strong and stable foundation. It helps to prevent the base course from settling or shifting, which can lead to cracks and other damage to the road surface. By providing a solid foundation, the GSB layer ensures that the road remains stable and durable for a longer period of time.

Reduces the cost of construction:

Using GSB layer in road construction can help to reduce the cost of construction. It is a cheaper alternative to other materials used in road construction, such as concrete or asphalt. The use of GSB can also reduce the need for other costly materials, such as geotextile fabric, which is used to stabilize the soil.

Easy to install:

The GSB layer is easy to install and requires minimal equipment and labor. It can spread over the subgrade using a motor grader or other equipment and can compact using a roller. This makes it a popular choice for road construction in rural areas, where the availability of equipment and labor is limite.

Provides a smooth surface:

The GSB layer helps to provide a smooth surface for the road. It helps to fill in any unevenness in the subgrade, providing a level surface for the base course. This, in turn, helps to provide a smooth and comfortable ride for the users of the road.

Provides good drainage:

The GSB layer provides good drainage for the road. It allows water to drain away from the surface of the road, reducing the risk of water accumulation and damage to the road. This helps to improve the safety of the road and reduces the risk of accidents due to wet road conditions.

Provides environmental benefits:

The use of the GSB layer in road construction can provide environmental benefits. It can reduce the need for other materials, such as asphalt, which is made from non-renewable resources. The use of GSB can also help to reduce the amount of waste generated during road construction, as it is made from locally available materials.

In conclusion, the GSB layer is an important component of road construction and provides several benefits. It provides stability and durability to the road, reduces the cost of construction, and is easy to install. It also provides a smooth surface and good drainage, improving the safety of the road. The use of GSB layer in road construction can also provide environmental benefits. Making it a popular choice for road construction projects.