Base Course of a Road

The base course is an important component of a road that provides the foundation for the pavement layer. It helps to distribute the loads from the traffic and prevent the deformation of the pavement. The base course is typically constructed with a layer of material that is strong, durable, and stable.

Broken Stone Aggregates

The correct answer for the materials used to construct the base course of a road is option 'D', broken stone aggregates. These aggregates are obtained by crushing the rocks and are available in various sizes. The size of the aggregates used for the base course depends on the thickness of the layer and the type of traffic expected on the road. The broken stone aggregates are preferred over other materials because of their superior mechanical properties.

Advantages of Broken Stone Aggregates

1. Strength - The broken stone aggregates are strong and durable, which makes them ideal for use in the base course of a road.

2. Stability - The aggregates are stable and do not deform easily, which helps to maintain the shape of the road.

3. Drainage - The broken stone aggregates have good drainage properties, which allows the water to flow through them and prevent the accumulation of water on the road.

4. Availability - The broken stone aggregates are readily available and can be obtained from local sources, which makes them cost-effective.

5. Compatibility - The broken stone aggregates are compatible with a wide range of soils and can be used in different types of soil conditions.

Conclusion

In conclusion, the base course of a road is constructed with broken stone aggregates because of their superior mechanical properties. The broken stone aggregates are strong, durable, stable, and have good drainage properties, which makes them ideal for use in the base course of a road.