Study on the Permeability of GCL Materials in Coupled Environment

Abstract As a new-type anti-seepage material, Geosynthetic Clay Liner (hereinafter referred to as GCL) has been applied in various projects and achieved good benefits. Based on different salt solution types, concentrations, dry-wet, freeze-thaw cycles, this paper designs permeability test of GCL after aging, the result shows that: (1) under influencing factors single solution, there is threshold concentration 0.15 mol/L, which means that increase rate coefficient suffers significant decrease above concentration. (2) With fewer numbers (<4 ) dry-wet cycles faster growth then returns gradually stability. (3) Compared with environments, cation valence have more prominent inhibition effect property GCL. The research results can provide data reference reasonable advice for deterioration indicators material its service life corresponding saline soil areas.