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A Study on the Coefficient of Friction of Soil/Geotextile Interfaces
Civil Engineer, P.O.Box 473, Cote St. Luc, Montreal, H4V 2Z1, Quebec, Canada NorAzazi Zakaria Lecturer, School of Civil Engineering, Universiti Sains Malaysia, Perak Branch Campus, Seri Iskandar, 31750 Tronoh, Perak, Malaysia |
ABSTRACT
It is well known that soil friction parameters have a significant effect on the overall performance of reinforced soil structures. Since the Coefficient of Friction of the soil is a function of these parameters, it was desired to further investigate the Coefficient of Friction of soil/geotextile interfaces and its relation to the tensile strength of the geotextile used.
Accordingly shear box tests were performed inside the laboratory using two soils; organic clay and sandy fill along with four geotextiles that have different tensile strengths to determine the cohesion and internal angle of friction of the soil/geotextile interfaces. These would be used to plot the Coefficient of Friction of these interfaces.
It appears from the results of the shear box tests that the Coefficient of Friction of geotextile/organic clay interfaces reduces with the increase of normal stress and increases with the increase of the geotextile tensile strength.
However geotextile tensile strength did not seem to have any significant effect on the Coefficient of Friction of geotextile/fill interfaces.
Keywords: Geotextiles, friction, tests
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