Proceedings of the 3rd International Conference on Environmental Geotechnology, Recycled Waste Materials and Sustainable Engineering (EGRWSE 2022), İzmir, Türkiye, 15 - 17 Eylül 2022, cilt.370 LNCE, ss.107-116
Soil stabilization methods are important in dealing with geotechnical engineering, especially for energy geo-structures. In the present study mechanical properties of reinforced and unreinforced sand-bentonite mixtures were evaluated by a series of laboratory tests such as unconfined compression test and direct shear tests. The bentonite ratio of the various test specimens was 20% and the proportions of colemanite, copper slag and glass fiber used as additives in the specimens were chosen as 1% for glass fiber and as 10% for copper slag and colemanite. Compaction tests were conducted to determine the optimum water content and maximum dry density of the mixtures. As a result of direct shear tests copper slag and glass fiber slightly increased and colemanite decreased the shear strength of the sand-bentonite mixture. Also, copper slag and colemanite decreased the unconfined compressive strength of the sand-bentonite mixtures whereas glass fiber increased.