Abstract
This research analyzes the effectiveness of different shear testing schemes in determining the most consistent and accurate shear strength results for geosynthetic materials. It also seeks to justify the necessity of implementing shear test methodology in the definition of the shear strength of geosynthetic materials in accordance with state standards. In the course of the research the characteristics of interaction of geosynthetic composite material “KAPLAM” with the soil will also be obtained. A 300×375 mm shear machine was used to perform shear tests at the soil-geomaterial interface with applied normal loads in the range of 100 to 500 kPa. These tests were performed according to the American standard ASTM D5321. Based on the data obtained from the testing, the test methodology that provides the most reliable and accurate results for measuring the shear strength of geosynthetics will be determined. It will also identify the main factors affecting the shear strength of the material and establish the mechanisms of their interaction. In addition, the results of the research will show the need for further study of this methodology on the example of other types of geosynthetic materials. In general, the results of this research have an important practical significance for the development of designs of railway embankments and cladding systems of artificial constructions, as well as for testing the shear strength of geosynthetic materials in laboratory conditions. Such tests allow for more accurate modeling of real operating conditions and more objective assessment of the shear strength of composite materials.