Which method is NOT commonly used to maintain moisture content in aggregate bases during construction?

Maintaining moisture content in aggregate bases is essential for achieving optimal compaction and performance in construction. The method of placing aggregates in direct sunlight is not commonly used to maintain moisture content because sunlight can lead to rapid evaporation of moisture, making it difficult to keep the aggregates adequately damp.

In contrast, covering materials with tarps helps to retain moisture by providing a barrier against direct sunlight and wind. Using moisture-retaining additives is a technique employed to help keep moisture within the aggregate, minimizing the amount of water lost. Similarly, storing aggregates in controlled environments allows for better management of moisture levels by protecting them from environmental factors that could lead to drying out.

Utilizing these methods ensures that the aggregates retain sufficient moisture, which is crucial for achieving desired structural properties during the placement and compaction phases of construction.