What is the key advantage of using dense-graded aggregate bases?

The primary advantage of using dense-graded aggregate bases lies in their ability to create a strong, stable layer with reduced void spaces. This characteristic is crucial for applications such as roadways or pavements, where stability and load distribution are essential for performance and longevity. Dense-graded aggregates are compacted very tightly, minimizing the number of voids that can lead to weakness or deformation under load.

The reduced void space enhances the strength of the base layer by allowing for better interlocking between aggregate particles, which contributes to the overall structural integrity. Additionally, this low-void condition helps with drainage by allowing water to escape efficiently, preventing issues such as erosion or instability caused by trapped water.

While the other options may have some merit in specific contexts, they do not directly highlight the fundamental benefit of dense-graded aggregates in providing a robust, stable foundation essential for supporting loads in construction.