What does D10 refer to in soil mechanics?

In soil mechanics, D10 is defined as the particle diameter for which 10% of the soil sample's mass consists of particles that have a smaller diameter. This metric is crucial for characterizing the grading of soil and is often used in the context of soil classification and analysis.

The D10 value helps engineers and geotechnical professionals understand the particle size distribution, which is essential for evaluating soil behavior under various loading and environmental conditions. Knowing the particle sizes allows for better predictions regarding permeability, compaction, and the overall stability of soil when used in construction and civil engineering projects.

This is why the parameter is so important—D10 gives insights into soil's behavior and its capacity to allow water to flow through it or its compaction characteristics, thus influencing design decisions and construction methodologies.