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Performance of Geosynthetic Clay Liner with Polymerized Bentonite in Highly Acidic or Alkaline Solutions
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 (ψ hole) 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.
Performance of Geosynthetic Clay Liner with Polymerized Bentonite in Highly Acidic or Alkaline Solutions
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 (ψ hole) 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.
Performance of Geosynthetic Clay Liner with Polymerized Bentonite in Highly Acidic or Alkaline Solutions
Prongmanee, Nutthachai (author) / Chai, Jin-Chun (author)
2019-09-01
11 pages
Article (Journal)
Electronic Resource
English
Mineral and Chemical Characterization of Geosynthetic Clay Liner Bentonite
| Springer Verlag | 2024
| NTIS | 1998
| NTIS | 1998