What Does Density Elastic Moduli Mean?
Density elastic moduli depend on the structure of the soil under test. Coarse-grained soil can have dense or loose structure while fine-grained soil can have a dense or dispersed structure.
It is also possible for two different soil samples to have the same dry density but different structures. For closely packed soils the modulus is high and is measured by dry density given as the ratio of the weight of solids by the total volume of wet soil sample.
The modulus of elasticity or Young's modulus is used for the estimation of settlement from static loads.
Trenchlesspedia Explains Density Elastic Moduli
Young's modulus also known as soil elastic modulus (E) measures the stiffness of soil. It can be obtained using laboratory tests on soil samples such as the triaxial unconsolidated undrained compression test or triaxial consolidated undrained compression test.
It can also be obtained using field tests such as the cone penetration test (CPT), standard penetration test (SPT) and plate load test. Soil stiffness and elastic moduli depend on the density and consistency of the soil.
Soil stiffness predicts the deflection of the soil when subjected to load and is an important factor in designing buried pipelines.