Date of Award


Publication Type

Master Thesis

Degree Name



Civil and Environmental Engineering

First Advisor

Budkowska, B. B.


Engineering, Civil.




As a natural occurrence, rutting develops during the using stage of flexible, pavement When the rutting becomes worse, users will experience an uncomfortable feeling. Moreover, this may eventually influence the life span of the pavement. It is of researcher's interest to find out an effective way to mitigate this phenomenon. The application of geotextile/geogrid is a good method. The objective of this research is to study the function of geotextile/geogrid, during gradual stiffening stage. In doing so, this research was processed in two steps. The first step was triaxial tests on the soil sample (base material) reinforced by different layers of geotextiles under different confining pressure. One-dimensional analysis was performed upon the test results. The second step was numerical analysis on the published data dealing with the permanent deformation. Finite Element Analysis and Sensitivity Analysis were exercised. The FEA was undertaken to identify the permanent resilient modulus (PRM) by assuming that the inclusion of geogrid influenced the PRM of all the layers, while the sensitivity analysis was done by assuming that the inclusion of geogrid merely affected the properties of base material. From the experiments, it was observed that the effect of adding more layers of geotextiles was more pronounced than the increase of confining pressure. From the numerical analysis, the conclusion can be drawn that the variation of permanent deformation was very sensitive to the variation of thickness coupled with permanent resilient modulus (PRM) of base layer. Source: Masters Abstracts International, Volume: 39-02, page: 0557. Adviser: B. B. Budkowska. Thesis (M.A.Sc.)--University of Windsor (Canada), 2000.