enimmäiskuivatiheys

Enimmäiskuivatiheys refers to the maximum dry density achievable for a given soil when compacted under specific laboratory conditions. It is a critical parameter in geotechnical engineering, particularly in earthwork construction for foundations, roads, and dams. Achieving the maximum dry density is desirable as it typically corresponds to the optimal moisture content, a state where the soil exhibits good strength, low compressibility, and reduced permeability.

The determination of enimmäiskuivatiheys is performed through standardized laboratory tests, most commonly the Proctor compaction test. This test involves compacting a soil sample in layers within a mold of a specific volume, using a standardized rammer and a specified number of blows. The soil is tested at various moisture contents, and for each moisture content, the dry density is calculated. Plotting the dry density against the moisture content reveals a curve that peaks at the maximum dry density.

The value of enimmäiskuivatiheys is influenced by factors such as the soil's grain size distribution, particle shape, and mineralogy. Finer-grained soils generally have a higher enimmäiskuivatiheys than coarser-grained soils. In construction, engineers use the enimmäiskuivatiheys and its corresponding optimal moisture content as a benchmark for field compaction. Field compaction efforts aim to achieve a specified percentage of the laboratory-determined maximum dry density to ensure adequate performance and longevity of the constructed earth structure.