What is the purpose of compaction rates specified in the FDOT specifications?

The purpose of compaction rates specified in the FDOT specifications is to achieve the desired density and performance of the asphalt mix. Proper compaction is crucial for ensuring that the asphalt pavement can support traffic loads without excessive deformation or failure over time. When the asphalt is compacted to the specified rates, it ensures that air voids are minimized, which in turn maximizes the strength and durability of the asphalt mixture. This leads to improved performance characteristics, such as resistance to cracking, raveling, and moisture damage, ensuring that the pavement can withstand the stresses imposed by vehicles and environmental factors. Enhanced density also contributes to the longevity of the pavement, making it a critical aspect of the construction and maintenance of asphalt surfaces.