What is the impact of paving during rain on the quality of service?

Paving during rain significantly decreases the quality of the service provided by Hot Mix Asphalt (HMA) for several reasons. Moisture on the surface can hinder the proper bonding of the asphalt mix with the base material and lead to issues such as stripping, which is the loss of adhesion between the asphalt and aggregates.

When rain occurs during the paving operation, the water can infiltrate the asphalt mix, leading to a reduced effective temperature of the hot mix. This cooling effect can prevent the asphalt from achieving the necessary compaction and density, resulting in weakened pavement structure and reduced lifespan. Furthermore, excess moisture can cause voids within the pavement once it sets, making it more susceptible to damage from freeze-thaw cycles and traffic load stresses.

Therefore, paving in wet conditions can ultimately impair the long-term performance of the roadway, leading to an increased likelihood of maintenance and repair needs over time. This is why the choice indicating a significant decrease in quality is the most accurate reflection of the adverse impacts of paving during rain.