Çimento, kireç ve uçucu kül ile iyileştirilen kaolin bentonit karışımı zeminlerin mekanik özellikleri

Tugba Eskisar

Öz


Bu çalışmada çimento, kireç ve uçucu kül ile yapılan iyileştirmenin kil zeminlerin mukavemet ve deformasyon özellikleri üzerindeki etkisi araştırılmıştır.  Bu amaçla kaolin-bentonit karışımı bir zemine çimento, kireç ve bu bağlayıcılara puzolan olarak uçucu kül katılarak hazırlanan numuneler farklı kür sürelerinde bekletildikten sonra serbest basınç deneyi ile dayanımları tespit edilmiş, katkı maddelerinin ve kür sürelerinin mekanik davranışa olan etkisi araştırılmıştır.  Numunelerin hazırlanmasında Harvard minyatür kompaktörü kullanılmıştır.  Katkı içermeyen zemine göre katkı maddeleri ile iyileştirilmiş zeminlerin çok daha gevrek bir davranış sergilediği ve göçme anındaki deformasyonlarının küçüldüğü gözlenmiştir.  Kür süresinin artması da deformasyon seviyesinin azalmasına sebep olmuştur.  %6 kireç-%3 uçucu kül içeren numuneler en yüksek mukavemeti vermiştir. Katkısız örneklere göre dayanım 180 gün sonunda 6.6 kat artmıştır. Kireç-uçucu kül katkısının çimentonun yerini alabilecek yüksek mukavemet ve daha düşük maliyetle bir alternatif oluşturabileceği görülmüştür.

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