AASHTO T 191-14 (2018) PDF Download

The AASHTO T 191-14 (2018) standard provides a procedure for determining the density of soils in their natural state. The method focuses on soils that have particles with a maximum diameter of 50 mm (2 in.).

The standard specifies the use of a sand cone apparatus to measure the volume of the excavated soil and the weight of the soil that is then replaced by sand in a cone-shaped hole. This allows for the calculation of the soil density in its in-place condition.

The purpose of this test is to evaluate the compaction levels and overall quality of the soil, which is important for construction projects, such as roadways or foundations. By determining the density of the soil in its natural state, engineers and construction professionals can make informed decisions regarding the adequacy of the soil for the intended application.