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Performance of Geosynthetic Clay Liner with Polymerized Bentonite in Highly Acidic or Alkaline Solutions

  • Nutthachai Prongmanee
  • Jin-Chun ChaiEmail author
Original Paper

Abstract

The hydraulic behavior of a polymerized bentonite (PB) and the self-healing capacity of a geosynthetic clay liner (GCL) using the PB as core material (PB-GCL) in corrosive solutions (pH ranging from 1 to 13) were investigated through a series of laboratory tests [i.e., free swelling index, swelling pressure, permeability (k) (consolidation), and leakage rate tests]. The test results indicate that the PB had a higher swelling capacity than that of the corresponding untreated bentonite (UB). Particularly, for pH greater than 12.5 solutions, PB had a higher free swelling index (FSI), higher swelling pressure, and lower k value than that of the PB with deionized water. PB-GCL with a damage hole had lower permittivity for the damage hole (ψhole) and a higher self-healing capacity than that of the GCL using UB as the core (UB-GCL). Based on the test results, it is suggested that PB-GCL can be used as an effective barrier material to contain acidic and alkaline liquids.

Keywords

Geosynthetic clay liner Bentonite Polymerized bentonite Permeability Swelling pressure Corrosive solutions 

List of Symbols

ψhole

Permittivity of damage hole (s−1)

α

Self-healing ratio (dimensionless)

Qud

Steady flow rate of the undamaged sample (m3/s)

Qd

Steady flow rate of the damaged sample (m3/s)

Atotal

Total specimen area (m2)

Ahole

Damaged area (m2)

Aunhealed

Unhealed area (m2)

A1

Healed area (m2)

Δh

Water head difference (mm)

Notes

Acknowledgements

This work was supported by the Grants-in-Aid for Scientific Research (KAKENHI) of the Japan Society for the Promotion of Science (JSPS) under Grant No. 17K06558, and the National Natural Science Foundation of China (NSFC) under Grant No. 51578333.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Civil Engineering and ArchitectureSaga UniversitySagaJapan

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