Factors Affecting Cation Exchange Between Geosynthetic Clay Liners and Compacted Subsoils
Proceedings of the 3rd International Conference on Environmental Geotechnology, Recycled Waste Materials and Sustainable Engineering (EGRWSE 2022), İzmir, Türkiye, 15 - 17 Eylül 2022, cilt.370 LNCE, ss.209-219, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 370 LNCE
- Doi Numarası: 10.1007/978-981-99-4041-7_20
- Basıldığı Şehir: İzmir
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.209-219
- Anahtar Kelimeler: Cation exchange, Geosynthetic clay liner, Subsoil water content, Vertical stress
- Dokuz Eylül Üniversitesi Adresli: Evet
Özet
The hydration behavior of geosynthetic clay liner (Na-GCL) was investigated to assess the hydration duration, vertical stress, and subsoil water content on cation exchange. Na-GCL with 4.0 and 5.0 kg/m2 MPUA were hydrated over silty sand compacted at four moisture contents. For each Na-GCLs considered, increasing in vertical stress led to a decrease in the final water content of the GCLs. In the meantime, Na-GCL absorbed water from the subsoil for up to 40 days. Afterward, the water content of GCLs does not change significantly. Besides, it was observed that increasing subsoil water content increases the final water content of the Na-GCLs. Cation exchange was observed significantly in the first 30 days of hydration. On the other hand, it was observed that an increase in vertical stress increased the cation exchange. Additionally, when the subsoil water content effect on cation exchange in terms of change in mole fractions, it was observed that the GCLs hydrated on the subsoils compacted at the wet side of the optimum water content, exposed more cation exchange.