What is the specific gravity of an aggregate?

The specific gravity of an aggregate is fundamentally defined as the ratio of the density of the aggregate to the density of water. This measurement provides insight into the density characteristics of the aggregate material, allowing engineers and technicians to assess its suitability for various construction applications.

Understanding the relationship with water is crucial because water's density is widely recognized as a standard for comparison, which enables the specific gravity value to be dimensionless. This aspect is essential for various engineering calculations, including volume conversions and calculations of voids in aggregates.

The other potential interpretations regarding the aggregate’s color or moisture content do not align with the definition of specific gravity. It specifically deals with density relative to water, not the physical appearance of the material or its moisture state, emphasizing the importance of accurate material characterization in construction and civil engineering.