Recently

geosynthetic clay liners (GCL) were more and more used in different anti-seepage engineering projects; and their swelling characteristics and hydraulic properties become a focus of designers and researchers. The influencing of liquids on swelling characteristics and hydraulic properties of GCL

as well as the relationship between swelling characteristics and hydraulic properties

were researched through hydration swell tests

free swell tests and hydraulic conductivity tests. It was found that hydration liquid and permeation liquid had influences on swelling characteristics and hydraulic properties of GCL. Test results have shown that: (1) the hydraulic conductivity of GCL was influenced by permeation liquids when hydration liquid was the same; and the hydraulic conductivity of GCL was also influenced by hydration liquids when permeation liquid was the same; (2) there was a relationship between hydration swells and hydraulic conductivities; the bigger the hydration swells

the lower the hydraulic conductivities; (3) there was also a relationship between free swells and hydraulic conductivities

the bigger the free swells

the lower the hydraulic conductivities.