Effect of Temperature on the Water Retention Capacity of Liner Materials
Mixtures of sand and clay are frequently used to serve for specific purposes in several engineering practices. In environmental engineering, liner layers and cover layers are common for controlling waste disposal facilities. These layers are exposed to moisture and temperature fluctuation specially when existing in unsaturated condition. The relationship between soil suction and water content for these materials is essential for understanding their unsaturated behavior and properties such as retention capacity and unsaturated follow (hydraulic conductivity). This study is aimed at investigating retention capacity for two sand-natural expansive clay mixtures (15% (C15) and 30% (C30) expansive clay) at two ambient temperatures within the range of 5 -50 °C. Soil water retention curves (SWRC) for these materials were determined at these two ambient temperatures using different salt solutions for a wide range of suction (up to 200MPa). The results indicate that retention capacity of C15 mixture underwent significant changes due to temperature variations. This effect tends to be less visible when the clay fraction is doubled (C30). In addition, the overall volume change is marginally affected by high temperature within the range considered in this study.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.3300494Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 454
 Clarke, B. G. (2009). Thermal Behaviour of the Ground. Ge´otechnique 59(3), pp.157–158.
 Tang, A-M. & Cui, Y.-J. (2009). Modelling the thermomechanical behaviour of compacted expansive clays. Geotechnique 59, No. 3, 185–195.
 Gens, A. (2010). Soil–environment interactions in geotechnical engineering. Géotechnique, 60(1), 3-74.
 Tang, A. M., & Cui, Y. J. (2005). 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.
 Villar, M. V., Gómez-Espina,R. and Lloret, A. 2010. Experimental investigation into temperature effect on hydro-mechanical behaviours of bentonite, Journal of Rock Mechanics and Geotechnical Engineering. 2 (1): 71–78.
 Salager, S., Rizzi, M., & Laloui, L. (2011). An innovative device for determining the soil water retention curve under high suction at different temperatures. Acta Geotechnica, 6(3), 135.
 Laloui, L., Salager, S., & Rizzi, M. (2013). Retention behaviour of natural clayey materials at different temperatures. Acta Geotechnica, 8(5), 537-546.
 Cai, G. Q., Zhao, C. G., Li, J., & Liu, Y. (2014). A new triaxial apparatus for testing soil water retention curves of unsaturated soils under different temperatures. Journal of Zhejiang University SCIENCE A, 15(5), 364-373.
 Fang, X. W., Shen, C. N., Li, C. H., & Wang, L. (2014). Test Study on Effects of Temperature, Sand Mix Ratios and Dry Density on Soil Water Characteristic Curves of Bentonite-Sand Mixtures. In Applied Mechanics and Materials, Vol. 580, pp. 359-363).
 Ye, W. M., Wan, M., Chen, B., Chen, Y. G., Cui, Y. J., & Wang, J. (2012). Temperature effects on the unsaturated permeability of the densely compacted GMZ01 bentonite under confined conditions. Engineering Geology, 126, 1-7.
 Yang, S., Huang, W. and Chung, S. (2015). Combined Effects of Temperature and Moisture Content on Soil Suction of Compacted Bentonite, Journal of Marine Science and Technology, Vol. 23, No. 3, pp. 281-287.
 Romero, E., Gens, A., & Lloret, A. (2001). Temperature effects on the hydraulic behaviour of an unsaturated clay. In Unsaturated Soil Concepts and Their Application in Geotechnical Practice (pp. 311-332). Springer, Dordrecht.
 Zhang, M., Zhang, H., Zhou, L., & Jia, L. (2013). Temperature effects on unsaturated hydraulic property of bentonite-sand buffer backfilling mixtures. Journal of Wuhan University of Technology-Mater. Sci. Ed., 28(3), 487-493.
 ASTM, D. (2006). 2487 (2006). Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System), ASTM International, 100, 19428-2959.
 Azam S. 2003. Influence of mineralogy on swelling and consolidation of soils in eastern Saudi Arabia, Canadian Geotechnical Journal, 40: 964-975.
 Al-Mahbashi, A. M. 2014. Soil Water Characteristic Curves of Treated and Untreated Highly Expansive Soil Subjected to Different Stresses. MSc thesis, Department of Civil Engineering, The University of King Saud, Riyadh, Saudi Arabia.
 ASTM (2003) D4546. Standard test methods for one-dimensional swell or collapse of cohesive soils. ASTM International, West Conshohocken, PA, USA, Vol. 4.08, D-18 Committee on soils and rocks.
 Dafalla, M. A. (2015). Efficiency of sand clay liners in controlling subsurface water flow. In Engineering Geology for Society and Territory-Volume 3 (pp. 497-499). Springer, Cham.
 ASTM (2000) D698. Standard test methods for laboratory compaction characteristics of soil using standard effort (12 400 ft-lbf/ft3 (600 kN-m/m3)). ASTM International, West Conshohocken, PA, USA, Vol. 4.08, D-18 Committee on soils and rocks.
 ASTM (2003) D5298. Standard test method for measurement of soil potential (suction) using filter paper. ASTM International, West Conshohocken, PA, USA, Vol. 4.08, D-18 Committee on soils and rocks.
 ASTM (2002) D6836. Standard test methods for determination of the soil water characteristic curve for desorption using a hanging column, pressure extractor, chilled mirror hygrometer, and/or centrifuge)). ASTM International, West Conshohocken, PA, USA, Vol. 4.08, D-18 Committee on soils and rocks.
 Fredlund, D. G. and Rahardjo, H. (1993) Soil mechanics for unsaturated soils, John Wiley and Sons, Inc. New York.
 Ye, W. M., Cui, Y. J., Qian, L. X., & Chen, B. (2009). An experimental study of the water transfer through confined compacted GMZ bentonite. Engineering Geology, 108(3-4), 169-176.