Under what conditions should asphalt mixtures not be produced or placed?

The production or placement of asphalt mixtures should not be conducted in the presence of standing water because water can significantly compromise the integrity of the asphalt mixture. When asphalt is placed on a wet surface, it may not bond properly to the underlying materials, leading to issues such as premature failure, rutting, and reduced durability. Additionally, moisture can cause the asphalt to lose its viscosity and performance characteristics, which are critical for ensuring longevity and stability in road surfaces. Effective compaction and adherence are vital for the structural integrity of the asphalt, and standing water creates an environment that hinders both. Therefore, any presence of standing water is a critical condition that should be avoided to ensure the quality and performance of the asphalt mixture.