Geosentetik Kil Örtülerin Fiziksel ve Mekaniksel Özellikleri
Geosentetik Kil Örtüleri (GCL); genellikle bir geotekstil veya geomembran olan bir geosentetik malzemenin iki katmanıarasına konan ince bir granüler toz veya sodyum bentonitten oluşan malzemedir. GCL’ler; her iki taraftaki geotekstilleriniçerdiği bentonit ile bir yapıştırıcı, iğneyle delme veya dikiş bağlama ile yapıştırılır. İğne delme işlemi, üsttekigeotekstildeki bazı liflerin tüm yapıyı birbirine bağlayarak bentonit ve alt geotekstile uzanmasına neden olur. Altgeotekstilde delinen lifler ya GCL'yi bir arada tutmak için doğal dolanma ve sürtünmeye dayanır ya da ısıtılarak alttakigeotekstile kaynaşarak potansiyel olarak iki geotekstil ve bentonit arasında daha güçlü bir bağ oluşturur. BentonitGCL’lerin en önemli bileşenidir ve yüksek oranda adsorbe eden volkanik küllerden oluşan (genellikle sodyum bentonittir)granüler kildir. Bu malzeme yüksek su tutma ve şişme potansiyeline sahiptir. GCL’lerin hidrolik özellikleri ve iletkenliğikullanılan kilin kalitesine bağlı olarak değişmektedir. Bentonit kilinin özellikleri başka katkı maddeleri de eklenerekgüçlendirilebilir. Bu makale kapsamında, geosentetik malzeme türlerinden olan Geosentetik Kil Örtüsü malzemesininfiziksel ve mekaniksel özellikleri ele alınmıştır.
Anahtar Kelimeler:
Geosentetik Kil Katmanlar (GCL), Geokompozit, Sıkıştırılmış Kil Katmanlar (CCL), Geotekstil (GT).
Physical and Mechanical Properties of Geosynthetic Clay Covers
Geosynthetic Clay Liners (GCL); is a material consisting of a fine granular powder or sodium bentonite placed betweentwo layers of a geosynthetic material, usually a geotextile or geomembrane. GCLs; The bentonite contained in thegeotextiles on both sides is bonded with an adhesive, needle punch or suture bonding. Needle punching causes somefibers in the upper geotextile to extend into the bentonite and lower geotextile, binding the entire structure together. Fiberspierced in the lower geotextile either rely on natural entanglement and friction to hold the GCL together, or are heatedand fused to the underlying geotextile, potentially creating a stronger bond between the two geotextiles and bentonite.Bentonite is the most important component of GCLs and is a granular clay composed of highly adsorbing volcanic ash(usually sodium bentonite). This material has high water retention and swelling potential. The hydraulic properties andconductivity of GCLs vary depending on the quality of the clay used. The properties of bentonite clay can be enhancedby adding other additives. In this paper, the physical and mechanical properties of GCL has been studied.
Keywords:
Geosynthetic Clay Liners (GCL), Geocomposite, Compressed Clay Layers (CCL), Geotextile (GT).,
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- Yayın Aralığı: Yılda 2 Sayı
- Başlangıç: 2020
- Yayıncı: EMRE YILMAZ
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