Hasan Fırat PULAT, Başar TAYTAK, Yeliz YÜKSELEN AKSOY

Biyopolimer katkıların killi ve kumlu zeminlerin permeabilite ve kayma dayanımına etkisinin araştırılması

Zeminlerin mühendislik özelliklerini iyileştirmek amacıyla birçok metot kullanılmaktadır. Geliştirilen metotların bazıları etkili bir çözüm üretemezken bazılarıysa pratik amaçlar için ekonomik olmayabilir. Bu çalışmada doğal kaolin, bentonit ve kum karışımlarının permeabilite ve kayma dayanımı davranışları üç farklı tür biyopolimerin (zantan gam, kitosan ve kitin) %0.25, %0.5, %0.75, %1 konsantrasyonları varlığında incelenmiştir. Deney sonuçları incelendiğinde zantan gam ve kitosanın permeabilite katsayısında 30 katı bulan azalmalara neden olduğu görülmüştür. Biyopolimerlerin kayma dayanımına etkisine bakıldığında %1’lik zantan gam ve kitosan konsantrasyonunun içsel sürtünme açısı değerinde %10-15 oranında bir artış sağladığı belirlenmiştir. Bu çalışmadan elde edilen sonuçlar biyopolimerlerin geçirimsiz kil bariyerlere ihtiyaç duyulan baraj gövdelerinde ve çöp depolama alanlarında kullanılabileceğini göstermiştir.

Anahtar Kelimeler:

Biyopolimer, Kayma dayanımı, Kitin, Kitosan, Permeabilite, Zantan gam

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