1 N) was applied or samples with forces beyond a critical limit (e.g. However, the AST is strongly susceptible to sample preparation and the vertical force of the upper plate. Depending on the retardation of the sample's shear stress reaction, viscous and elastic strain proportions are defined with the help of storage and loss modulus (G′ and G″), and their ratio (tan δ). This test is based upon a soil sample positioned between two parallel plates, where the upper plate rotates in an oscillatory manner with increasing stress or strain amplitude, and the lower plate is fixed. stress-strain relationships under transient stresses that occur due to wheeling or trampling. This method is well established by means of the amplitude sweep test (AST) to detect vis-coelastic properties of soils, i.e. One method to detect flow and deformation behavior under steady and transient stresses is rheometry. Although there are evidences that most, if not all, soil physical and mechanical processes on larger scales have their origin in processes and properties at the microscale, the range of methods to investigate micro-scaled soil behavior directly is limited.
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