How does moisture affect the performance of asphalt mixes?

Moisture plays a critical role in the performance of asphalt mixes, with the correct understanding highlighting its potential negative impact. Specifically, the presence of moisture can lead to stripping, which is the separation of the asphalt binder from the aggregate. This phenomenon diminishes the bond between the materials, resulting in reduced durability and strength of the asphalt mix.

Stripping can occur when moisture infiltrates the asphalt layer, compromising the adhesion and, ultimately, the structural integrity of the pavement. This can result in worse performance characteristics, such as susceptibility to cracking and raveling, leading to a shorter lifespan for the roadway and increased maintenance costs.

In contrast, the other options suggest either a beneficial impact or no effect at all from moisture, which does not align with established knowledge in asphalt technology. Therefore, recognizing the detrimental effects of moisture is crucial for ensuring the long-term performance and reliability of asphalt mixes.