EFFECT OF ASPECT RATIO ON THE FREEZING-THAWING OF A CH CLAY

Rahim Kağan AKBULUT; Ahmet Şahin ZAİMOĞLU

EFFECT OF ASPECT RATIO ON THE FREEZING-THAWING OF A CH CLAY

Rahim Kağan AKBULUT, Ahmet Şahin ZAİMOĞLU

Öz

Donma-çözülmeye maruz zeminlerin davranışı numune boyutuna (ξ=boy/çap) bağlı olarak nasıl değişeceği tam olarak bilinmemektedir. Bu çalışmada numune boyutunun ince daneli zeminlerde 0, 5, 10 ve 20 donma-çözülme çevrim sonrası serbest basınç mukavemeti ve donma-çözülme dayanımı üzerindeki etkisi araştırılmıştır. Donma-çözülme deneyi donma sıcaklığı -20^oC çözülme sıcaklığı +25^oC olan otomatik donma-çözülme kabininde, serbest basınç deneyi yükleme hızı 0.8 mm/dk olan serbest basınç deney aletinde yapılmıştır. Bu değerler deney sırasında sabit tutulmuştur. Deneyler standart proktor enerjisinde hazırlanmış farklı ξ (boy/çap) oranlarına sahip silindirik numuneler üzerinde yürütülmüştür. Deney sonuçlarından numunelerin ρ oranı ve donma-çözülme çevrim sayısının artmasıyla serbest basınç mukavemeti ile donma-çözülme dayanıklılığının azaldığı belirlenmiştir.

Anahtar Kelimeler

Boy/çap oranı, donma-çözülme, serbest basınç dayanımı, CH kil

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