Hidrasyon sırasında geosentetik kil örtü ve sıkıştırılmış alt zemin arasındaki katyon değişimini kontrol eden faktörler

In this study, hydration experiments were conducted using three different GCLs to investigate hydration time, bentonite mass per unit area (MPUA), subsoil water content (wsubsoil), and vertical stress. As a result of these experiments, it was observed that as the hydration time increased, the water content of the GCLs increased, but the water content reached equilibrium after the 4th week. It was observed that the final water content (wfinal) of GCLs increased with the increase of water content in the subsoil. It was also observed that the increase in MPUA caused a decrease in the wfinal of the GCLs. It was found that the increase in vertical stress caused a slight decrease in the wfinal by limiting the swelling of the bentonites. As a result of bound cation tests, although it was observed that the cation exchange decreased with increasing water content of the subsoils in the early stages of hydration, the opposite result was obtained in the 180-day hydration experiments. On the other hand, increase in vertical stress facilitated the cation exchange by improving the contact between the GCL and the subsoil. Also, the water content of the subsoils at the end of the hydration period was determined as a function of depth. It was observed that the water content of the subsoil decreased with increasing MPUA of the hydrated GCL.