Akademik Veri Yönetim Sistemi
17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019, Reykjavik, İzlanda, 1 - 06 Eylül 2019
In the last decade there has been a rapid increase in the number and type of energy structures due to increasing energy requirements. The energy geostructures are into direct contact with the soil, causing thermal changes in the soil. Recent studies have shown that thermal cycling and high temperature lead to changes in engineering properties such as hydraulic conductivity, volumetric change and shear strength. There is a need for thermally resistive and durable soil layers at the nuclear waste landfills and under energy structure foundation systems. In this study, boron additives namely; colemanite and ulexite were added to sand-bentonite mixtures in order to develop heat resistant soil material which can maintain the resistance against heat effects. The 10% and 20% bentonite was used in the sand-bentonite mixtures. The mixtures were compacted at maximum dry unit weight and optimum water content in the specificially manufactured wooden box. Boron minerals added at the percentages of 5%, 10% and 15%, and thermal resistivity measurements were performed. When the results are examined, it has been found that the colemanite and ulexite minerals improve the thermal resistivity of the sand-bentonite mixtures. The effect of colemanite is more significant than ulexite.