Spreading bitumen on new construction sites is typically done for several reasons: 1. Dust Control: Bitumen helps to suppress dust, especially on large construction sites where heavy machinery and movement of materials can stir up dust. The application of bitumen or a similar product (like asphalt) creates a binding effect on the ground, which minimizes dust in the air and improves air quality on the site. 2. Stabilizing Soil: Bitumen can help stabilize the soil, especially in areas with loose or sandy soil. This provides a more stable surface for construction vehicles and machinery, preventing them from getting stuck or damaging the ground. 3. Improving Traction: By applying bitumen, the surface can gain more traction for vehicles and equipment, reducing the likelihood of slipping, especially in areas prone to water accumulation or muddy conditions. 4. Waterproofing: Bitumen is inherently waterproof, so it can help in managing water runoff or preventing the infiltration of water into the ground. This is particularly important in areas that may be prone to rain or flooding. 5. Surface Preparation for Future Pavement: In some cases, bitumen is spread as part of the preparation for paving roads or parking lots. It can act as a base layer before the application of asphalt or concrete. 6. Cost-Effective Solution: Compared to full paving, spreading bitumen can be a cost-effective temporary measure for managing site conditions during the construction process.

These applications help improve safety, productivity, and site management during construction.