Abstract
Interface shear strength is known to be influenced by surface features of planar materials. The tilt table test is one of the available methods for measuring the friction effects of surface characteristics. This paper describes a simple tilt table device for measuring index friction angle of geosynthetics. Test results are presented for various types of geomembranes, geotextiles and geonets. Friction angle is found to depend on the product surface being evaluated. The precision of the test is found to be typical of many other procedures used for quality control and conformance testing of geosynthetics.
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