Doğal Bir Materyal Olarak Keçi Kılı Lifleriyle Modifiye Edilen Kohezyonlu Zeminlerin Donma-Çözülme Direnci

Yıl 2020, Cilt: 7 Sayı: 13, 157 - 166, 28.12.2020

Necmi Yarbaşı

Öz

Bu araştırma, doğal bir malzeme olan keçi kılı lifleri ile takviye edilmiş killi zeminin donma-çözülme testi sonucundaki dayanım değişikliklerini belirlemek amacıyla yapılmıştır.Bu çalışmada kullanılan killi zemine % 0.5, %1, %1,5 ve %2 Keçi Kılı lifleri ilave edilmiştir.İnce ve iri taneli zeminlerin doğal katkı maddeleri ile zayıf jeoteknik özellikleri güçlendirilmesi/modifikasyonu son yıllarda birçok çalışmanın ana konusu olmuştur. Donma ve çözülmeye maruz kalan zeminlerin mukavemetini arttırmak için en uygun katkı maddelerinin, katkı oranlarının ve kür süresinin seçilmesini gerektirir. Bu çalışmada hem ana malzeme (killi zemin) hem de dört farklı karışım numunesi için 1, 7 ve 28 günlük kür süreleri ve 12 donma-çözülme döngüsü gerçekleştirilmiştir.Örneklerin 24 saat ayarlanabilir dondurma-çözdürme kabinine -21°C'de ve +21°C'de 24 saat yerleştirilmesiyle bir döngü tamamlanmıştır.Tek eksenli basınç dayanımı testi ile eklenen katkı maddesinin killi zeminin donma-çözülme öncesi ve sonrası direncini artırdığı belirlenmiştir.En uygun karışım 28 günlük kür sonrasında Kil +%1.5 Keçi kılı lifi olarak belirlenmiştir. Sonuç olarak, killi toprak ve keçi kılı liflerinin eşzamanlı kullanımının, incelenen kohezyonlu killi zeminlerin stabilizasyonu/güçlendirilmesi için etkili bir strateji olarak kabul edilebileceği sonucuna varılmıştır.

Anahtar Kelimeler

Kil, Keçi kılı lifi, MUkavemet, Donma-çözülme

Kaynakça

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