Abstract
Tests were conducted to determine how prehydration water content affects the hydraulic conductivity of geosynthetic clay liners (GCLs) permeated with calcium chloride (CaCl2) solutions of various concentratins. Results of the tests show that prehydration may not prevent the hydraulic conductivity of GCLs from increasing when permeated with divalent solutions. Hydraulic conductivities generally increased with CaCl2 concentration, regardless of the prehydration water content, with hydraulic conductivities as much as 85,000 times higher than that obtained with deionized water. Application of a light confining stress during prehydration did not consistently result in lower hydraulic conductivities. Hydraulic conductivities much higher than anticipated were obtained when prehydration did not occur uniformly, indicating that prehydration must be carefully implemented in the field if it is to be reliable. Hydraulic conductivity was inversely correlated with void ratio, which is consistent with differences in the swelling of the bentonite granules for fully and partially prehydrated GCLs.
| Original language | English |
|---|---|
| Pages | 685-699 |
| Number of pages | 15 |
| Publication status | Published - 2001 |
| Externally published | Yes |
| Event | Geosynthetics Conference 2001 - Oregon, United States Duration: 2001 Feb 12 → 2001 Feb 14 |
Other
| Other | Geosynthetics Conference 2001 |
|---|---|
| Country/Territory | United States |
| City | Oregon |
| Period | 01/2/12 → 01/2/14 |
ASJC Scopus subject areas
- General Materials Science
- General Environmental Science
- General Earth and Planetary Sciences
- General Engineering