Which of the following is a characteristic of aggregate base?

The correct answer highlights that aggregate base is designed to support loads by transferring weight down to the underlying soils. This characteristic is crucial, as the primary function of aggregate base material is to create a structural foundation for roads, pavements, and other surfaces. This material is typically composed of a mix of coarse and fine particles that are compacted to form a stable base, which helps distribute loads effectively to prevent deformation and damage.

The other options do not accurately describe the general characteristics of aggregate base. While aggregate materials can have varying particle shapes, a composition of solely smooth particles is not representative of typical aggregate bases, which often include a variety of particle shapes for better interlocking and compaction. Although some porous characteristics can enhance drainage, aggregate base needs specific gradation and compaction to function effectively in load distribution rather than being primarily focused on porosity. Lastly, while aggregate may be used in residential areas, its use is not limited to these areas, as it is essential in all types of construction projects, including commercial and infrastructure applications.