A Review on Factors Affecting the Resilient Modulus of Subgrade Soils

The subgrade layer is the lowest pavement layer, which carries loads transferred from upper layers. Different researchers have studied resilient modulus (Mr) of different soils for fine-grained and coarse-grained soil types. layer's response mechanism was found to be those fine coarse materials, it vital improving performance life constructed over it. parameters related that can affect include moisture content, stress level, compaction degree, loading frequency, matric suction characteristics. Due variability Mr result, a study needed each type input parameter. effects these on are reviewed discussed in this paper. results show water content beyond optimum level increase deviatoric decreased Mr. In contrast, confining stress, improve During wetting drying soil, improved process.