The explanation of the term involves the resistance of a soil or aggregate material to penetration compared to that of a well-graded crushed stone. It’s a measure used to evaluate the suitability of a subgrade for supporting pavements and structures. As an example, a value of 100% indicates a material’s resistance to penetration is equivalent to the standard crushed rock, while lower values indicate lower bearing capacity. The definition also encompasses the test method used to determine this ratio, involving controlled penetration of a standard plunger into the material.
Understanding this concept is crucial in geotechnical engineering for several reasons. It allows engineers to assess the strength and stability of soils before construction, leading to safer and more durable infrastructure. Historically, this test has provided a standardized method for comparing different soil types, allowing for more informed decisions about material selection and pavement design. Its application reduces the risk of premature pavement failure and minimizes long-term maintenance costs.
