Improvement of Shear Strength of Zeolite-Bentonite Liner Material under High Temperatures with Tincal and Pumice

Öz

Thermal changes (high temperature and thermal cycles) occur around energy structures, such as energy piles, nuclear waste repositories, etc. Sometimes these temperature changes affect the engineering properties of surrounding soils undesirably. Hence, there is a need for durable soils that can maintain their engineering properties unchanged under high temperature and thermal cycles for a long time. Tincal and pumice are used in the production of temperature-resistant and heat-insulated materials. Therefore, in the present study, 10% and 20% tincal and pumice additives were added to zeolite-bentonite mixtures and shear strength behavior of the mixtures was investigated under room and high temperatures (80°C). According to the results, the maximum shear stress values of zeolite- bentonite mixtures generally increased in the presence of tincal and pumice additives under high temperature. Both additives are effective for improvement, however; the effect of pumice can be more pronounced.

Anahtar Kelimeler

• Energy geo-structures
• pumice
• tincal
• zeolite
• bentonite
• shear strength

Kaynakça

1. Mitchell, J.K., Temperature Effects on the Engineering Properties and Behavior of Soils. Proceeding of International Conference on the Effects of Temperature and Heat on Engineering Behaviour of Soils, 9(6), 9–28, 1969.
2. Burghignoli, A., Desideri, A., Miliziano, S., A Laboratory Study on the Thermomechanical Behaviour of Clayey Soils. Canadian Geotechnical Journal, 37(4), 764–780, 2000.
3. Abuel-Naga, H.M., Bergado, D.T., Ramana, G.V., Grino, L., Rujivipat, P., Thet, Y., Experimental Evaluation of Engineering Behavior of Soft Bangkok Clay under Elevated Temperature. Journal of Geotechnical and Geoenvironmental Engineering, 132(7), 902–910, 2006.
4. Hong, Z.S., Bian, X., Cui, Y.J., Gao, Y.F., and Zeng, L.L., Effect of Initial Water Content on Undrained Shear Behaviour of Reconstituted Clays. Géotechnique, 63(6), 442–450, 2013.
5. Abuel-Naga, H.M., Effect of Temperature on Shear Strength and Yielding Behavior of Soft Bangkok Clay. Soils and Foundations, 47(3), 423–436, 2007.
6. Wang, S., Zhu, W., Qian, X., Xu, H., Fan, X., Temperature Effects on Non-Darcy Flow of Compacted Clay. Applied Clay Science, 135, 521–525, 2017.
7. Öncü, Ş., Bilsel, H., Effect of Zeolite Utilization on Volume Change and Strength Properties of Expansive Soil as Landfill Barrier. Canadian Geotechnical Journal, 54(9), 1320–1330, 2017.
8. Akgün, H., Koçkar, M.K, Aktürk, Ö., Evaluation of a Compacted Bentonite/sand Seal for Underground Waste Repository Isolation. Environmental Geology, 50, 331-337, 2006.

9. Bish, F., Guthrie, G.D., Mineralogy of Clay and Zeolite Dusts (exclusive of 1:1 layer silicates). In Health effects of mineral dusts. Edited by G.D. Guthrie and B.T. Mossmann. Reviews in Mineralogy, 28, 139–184, 1993.
10. Kaya. A., Durukan, S., Ören, A.H., Yükselen, Y., Determining the Engineering Properties of Bentonite-zeolite Mixtures. Teknik Dergi, 17(3), 3879-3892, 2006.
11. Yükselen-Aksoy, Y., Characterization of Two Natural Zeolites for Geotechnical and Geoenvironmental Applications. Applied Clay Science, 50, 130-136, 2010.
12. Galvão, T.C.B., Kaya, A., Ören, A.H., Yükselen, Y., Geomechanics of Landfills-Innovative Technology for Liners. Soil & Sediment Contamination, 17(4): 411-424, 2008.
13. Kaya, A., Durukan, S., Utilization of Bentonite-Embedded Zeolite as Clay Liner. Applied Clay Science, 25, 83-91, 2004.
14. Witham, A.G., Sparks, R.S.J., Pumice. Bulletin of Volcanology, 48, 209-223, 1986.
15. Liguori, V., Sciorta, R., Ruisi, V., The Pumice Aggregates of Lipari Island (Aeolian Isles-Italy). Bulletin of the International Association of Engineering Geology, 30, 431–434, 1984.
16. Alpaydın, Ş.G., An Investigation of Effects of Boron Additives on the Permeability and Shear Strength Behavior of Sand-Bentonite Mixtures Under HighTemperatures. MSc. Thesis, Dokuz Eylül University, 2019.
17. Abedi Koupai, J. Application of natural and synthetic water absor-bents materials on soil hydraulic properties. Research Report, Isfahan University of Technology, 2012.
18. ASTM D 698., Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort, ASTM International, USA, 2012.
19. ASTM D 3080., Standard Test Method for Direct Shear Test of Soils Under Consolidated Drained Conditions, ASTM International, USA, 2018.
20. Georgiannou, V.N., Lefas, D., Konstadinou M., Perraki, M., Geotechnical properties of a natural zeolite. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 170:5, 395-406, 2017.
21. Wersin, P., Johnson, L. H., Snellman, M., Impact of iron released from steel components on the performance of the bentonite buffer: A preliminary assessment within the framework of the KBS-3H disposal concept. MRS Proceedings, 932, 117, 2006.
22. Bish, D.L., Carey, B. Thermal Behavior of Natural Zeolites. Reviews in Mineralogy and Geochemistry, In book: Natural Zeolites: Occurrence, Properties, Applications, Editors: D. L. Bish and D. W. Ming, Mineralogical Society of America, Washington, DC, 45(1), 403-452, 2001.
23. Tang, A.M., Cui Y.J. Controlling Suction by the Vapour Equilibrium Technique at Different Temperatures and Its Application in Determining the Water Retention Properties of MX80 Clay. Canadian Geotechnical Journal, 42 (1), 287-296, 2005.
24. Privett, K. J.E. Gillott Clay in Engineering Geology, 2nd Edition. (Developments in Geotech Eng 41.) Elsevier Science Publishers, Amsterdam, 1987.