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Dem Simulation of Triaxial Tests on Coarse Aggregates Applicable for Base and Sub-Base of Roads and Railways
, M.Sc. Thesis Sharif University of Technology ; Pak, Ali (Supervisor)
Abstract
In this study, numerical modeling of the micromechanical behavior of gravel aggregates applicable for base and sub-base of roads and railways under triaxial compression tests is conducted. The material is a type of well-graded gravelly soil with a maximum particle size of 20 mm, whose application is recommended by the UK Highways Agency. The prominent role of this material in the performance and endurance of the roads shows the importance of studying its behavior to acquire a better understanding of its mechanical properties. A number of triaxial tests using monotonic and cyclic loadings have been performed in the laboratory to investigate the behavior of this type of material. In the...
Discrete Element Method (DEM)Modeling of the Behavior of Uncemented and Cemented Coarse-Grained Soils in Triaxial Test Using Non-Spherical Particles
, M.Sc. Thesis Sharif University of Technology ; Pak, Ali (Supervisor)
Abstract
The present research focuses on the numerical modeling of the behavior of uncemented and 1% and 2% cemented coarse-grained materials commonly used in the base and subbase of roads and railways. Portland cement is used as a stabilizing material to improve the performance of aggregates in road/railroad construction, which requires an understanding of the mechanical properties of these materials for optimal design. Numerous triaxial tests under monotonic and cyclic loading have been conducted to investigate the mechanical properties of these materials. Conducted laboratory experiments have several limitations, such as high costs, membrane rupture under high confining pressures, and the...