Skip to main content
main-content

Tipp

Weitere Kapitel dieses Buchs durch Wischen aufrufen

Erschienen in:
Buchtitelbild

2021 | OriginalPaper | Buchkapitel

Investigation of Hydraulic Conductivity of SHMP Amended Soil-Bentonite Backfills Exposed to Lead-Impacted Groundwater

verfasst von: Zhe-Yuan Jiang, Run Zhang, Xian-Lei Fu, Jia-Lei Wan, Shuang-Jie Li, Yu-Ling Yang, Yan-Jun Du

Erschienen in: Developments in Sustainable Geomaterials and Environmental Geotechnics

Verlag: Springer International Publishing

share
TEILEN

Abstract

This paper presents results of investigation of hydraulic conductivity of soil-bentonite backfill (referred as SB backfill) and sodium hexametaphosphate (SHMP)-amended soil-bentonite backfill (referred as SHMP-SB backfill) exposed to lead-impacted groundwater. Lead nitrate (Pb(NO3)2) solutions with various concentrations were tested as permeant liquids for the flexible wall permeameter hydraulic conductivity tests. Series of laboratory experiments were conducted to assess slump height of the backfills, free swell index of conventional bentonite with and without SHMP-amendment, and hydraulic conductivity of the backfills in tap water and Pb(NO3)2 solutions. The results showed that the moisture contents corresponding to the target slump were 38% and 32% for SB and SHMP-SB backfills, respectively. The free swelling index of conventional bentonite in the 50–60 mM Pb(NO3)2 solutions was enhanced with SHMP amendment. The hydraulic conductivity of SB and SHMP-SB backfills increased with increasing concentration of Pb(NO3)2 solutions as expected. The hydraulic conductivity of SHMP-SB backfill was below the commonly accepted value (10−9 m/s) regardless of the type of permeant liquid, whereas hydraulic conductivity of SB backfill was higher than 10−9 m/s in the Pb(NO3)2 solutions with concentrations of 50 and 500 mM.
Literatur
Zurück zum Zitat ASTM D7100: Standard test method for hydraulic conductivity compatibility testing of soils with Aqueous solutions. American Society for Testing and Materials, Philadelphia (2011) ASTM D7100: Standard test method for hydraulic conductivity compatibility testing of soils with Aqueous solutions. American Society for Testing and Materials, Philadelphia (2011)
Zurück zum Zitat ASTM D854: Standard test methods for specific gravity of soil solids by water pycnometer. American Society for Testing and Materials, Philadelphia (2014) ASTM D854: Standard test methods for specific gravity of soil solids by water pycnometer. American Society for Testing and Materials, Philadelphia (2014)
Zurück zum Zitat ASTM D5084: Standard test methods for measurement of hydraulic conductivity of saturated porous materials using a flexible wall permeameter. American Society for Testing and Materials, Philadelphia (2016) ASTM D5084: Standard test methods for measurement of hydraulic conductivity of saturated porous materials using a flexible wall permeameter. American Society for Testing and Materials, Philadelphia (2016)
Zurück zum Zitat ASTM D2487: Standard practice for classification of soils for engineering purposes (Unified Soil Classification System). American Society for Testing and Materials, Philadelphia (2017a) ASTM D2487: Standard practice for classification of soils for engineering purposes (Unified Soil Classification System). American Society for Testing and Materials, Philadelphia (2017a)
Zurück zum Zitat ASTM D4318: Standard test methods for liquid limit, plastic limit, and plasticity index of soils. American Society for Testing and Materials, Philadelphia (2017b) ASTM D4318: Standard test methods for liquid limit, plastic limit, and plasticity index of soils. American Society for Testing and Materials, Philadelphia (2017b)
Zurück zum Zitat ASTM D7503: Standard test method for measuring the exchange complex and cation exchange capacity of inorganic fine-grained soils. American Society for Testing and Materials, Philadelphia (2018) ASTM D7503: Standard test method for measuring the exchange complex and cation exchange capacity of inorganic fine-grained soils. American Society for Testing and Materials, Philadelphia (2018)
Zurück zum Zitat ASTM D5890: Test method for swell index of clay mineral component of geosynthetic clay liners. American Society for Testing and Materials, Philadelphia (2019a) ASTM D5890: Test method for swell index of clay mineral component of geosynthetic clay liners. American Society for Testing and Materials, Philadelphia (2019a)
Zurück zum Zitat ASTM D4972. Test Methods for pH of Soils. American Society for Testing and Materials, Philadelphia (2019b) ASTM D4972. Test Methods for pH of Soils. American Society for Testing and Materials, Philadelphia (2019b)
Zurück zum Zitat Bohnhoff, G.L.: Membrane behavior, diffusion, and compatibility of a polymerized bentonite for containment barrier applications. Dissertation Abstracts International, 74(06) (2012) Bohnhoff, G.L.: Membrane behavior, diffusion, and compatibility of a polymerized bentonite for containment barrier applications. Dissertation Abstracts International, 74(06) (2012)
Zurück zum Zitat Di Emidio, G.: Hydraulic and chemico-osmotic performance of polymer treated clays (Ph.D. thesis). Ghent University (2010) Di Emidio, G.: Hydraulic and chemico-osmotic performance of polymer treated clays (Ph.D. thesis). Ghent University (2010)
Zurück zum Zitat EPA: Evaluation of subsurface engineered cutoff walls at waste sites. Environmental Protection Agency Solid Waste and Emergency Response (1998) EPA: Evaluation of subsurface engineered cutoff walls at waste sites. Environmental Protection Agency Solid Waste and Emergency Response (1998)
Zurück zum Zitat Evans, J.C., Daniel, R.P.: Stresses in soil-bentonite slurry trench cutoff wall. In: Geo-Congress 2019: Geoenvironmental Engineering and Sustainability. American Society of Civil Engineers, Reston, pp. 177–184 (2019) Evans, J.C., Daniel, R.P.: Stresses in soil-bentonite slurry trench cutoff wall. In: Geo-Congress 2019: Geoenvironmental Engineering and Sustainability. American Society of Civil Engineers, Reston, pp. 177–184 (2019)
Zurück zum Zitat Kondo, M.: Method of activation of clay and activated clay. Google Patents (1996) Kondo, M.: Method of activation of clay and activated clay. Google Patents (1996)
Zurück zum Zitat Malusis, M.A., Yeo, S., Evans, J.C.: Hydraulic conductivity of model soil–bentonite backfills subjected to wet–dry cycling. Can Geotech J. 48(8), 1198–1211 (2011) CrossRef Malusis, M.A., Yeo, S., Evans, J.C.: Hydraulic conductivity of model soil–bentonite backfills subjected to wet–dry cycling. Can Geotech J. 48(8), 1198–1211 (2011) CrossRef
Zurück zum Zitat Malusis, M.A., Di Emidio, G.: Hydraulic conductivity of sand-bentonite backfills containing HYPER clay. In: Geo-Congress 2014 Technical Papers: Geo-characterization and Modeling for Sustainability. ASCE, pp. 1870–1879 (2014) Malusis, M.A., Di Emidio, G.: Hydraulic conductivity of sand-bentonite backfills containing HYPER clay. In: Geo-Congress 2014 Technical Papers: Geo-characterization and Modeling for Sustainability. ASCE, pp. 1870–1879 (2014)
Zurück zum Zitat Onikata, M., Kondo, M., Kamon, M.: Development and characterization of a multiswellable bentonite. In: Environmental Geotechnics, pp. 587–590 (1996) Onikata, M., Kondo, M., Kamon, M.: Development and characterization of a multiswellable bentonite. In: Environmental Geotechnics, pp. 587–590 (1996)
Zurück zum Zitat Scalia, J., Benson, C.H., Bohnhoff, G.L., Edil, T.B., Shackelford, C.D.: Long-term hydraulic conductivity of a bentonite-polymer composite permeated with aggressive inorganic solutions. J Geotech Geoenviron Eng. 140(3), 04013025 (2013) CrossRef Scalia, J., Benson, C.H., Bohnhoff, G.L., Edil, T.B., Shackelford, C.D.: Long-term hydraulic conductivity of a bentonite-polymer composite permeated with aggressive inorganic solutions. J Geotech Geoenviron Eng. 140(3), 04013025 (2013) CrossRef
Zurück zum Zitat Yang, Y.L., Du, Y.J., Reddy, K.R., Fan, R.D.: Effect of phosphate amendment on hydraulic conductivity of soil-calcium bentonite backfill for vertical cutoff walls. In: GeoChicago 2016: Sustainability, Energy, and the Geoenvironment. ASCE, Chicago (2016) Yang, Y.L., Du, Y.J., Reddy, K.R., Fan, R.D.: Effect of phosphate amendment on hydraulic conductivity of soil-calcium bentonite backfill for vertical cutoff walls. In: GeoChicago 2016: Sustainability, Energy, and the Geoenvironment. ASCE, Chicago (2016)
Zurück zum Zitat Yang, Y.L., Reddy, K.R., Du, Y.J., Fan, R.D.: Short-term hydraulic conductivity and consolidation properties of soil-bentonite backfills exposed to CCR-impacted groundwater. J Geotech Geoenviron Eng. 144(6), 04018025 (2018) CrossRef Yang, Y.L., Reddy, K.R., Du, Y.J., Fan, R.D.: Short-term hydraulic conductivity and consolidation properties of soil-bentonite backfills exposed to CCR-impacted groundwater. J Geotech Geoenviron Eng. 144(6), 04018025 (2018) CrossRef
Metadaten
Titel
Investigation of Hydraulic Conductivity of SHMP Amended Soil-Bentonite Backfills Exposed to Lead-Impacted Groundwater
verfasst von
Zhe-Yuan Jiang
Run Zhang
Xian-Lei Fu
Jia-Lei Wan
Shuang-Jie Li
Yu-Ling Yang
Yan-Jun Du
Copyright-Jahr
2021
DOI
https://doi.org/10.1007/978-3-030-79647-1_1