Liquid limit determination of various sand clay mixtures by Casagrande and fall cone test methods

Abstract

This study aims to evaluate the liquid limit of various sand-clay mixtures obtained from both Casagrande and fall-cone test. Two types of clay (bentonite/kaolinite) were mixed with quartz and fine sand (FS) at mixture ratios of 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% by dry weight. The results indicated that fall cone penetration was governed by the water content of sand-clay mixtures. Cone penetration of sand decreased with 30% kaolinite addition whereas then increased interval between 30% to 100% kaolinite, but for bentonite, it increased from 0% to 100% bentonite content at constant water contents. Different equations between Casagrande and fall cone tests were proposed for different mixture types. Liquid limit values for both methods were found to be greater for bentonite-sand mixtures that kaolinite-sand mixtures. 

Keywords

• Sand-clay mixtures,fall cone test,Casagrande test,liquid limit

Düşen koni ve Casagrande deneyleri ile çeşitli kum-kil karışımlarında likit limit hesaplaması

Abstract

Bu çalışma, hem Casagrande hem de düşen koni deneylerinden elde edilen çeşitli kum-kil karışımlarının likit limit değerlerini değerlendirmeyi amaçlamaktadır. İki tür kil (bentonit / kaolin) 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, ve100%  karışım oranlarında kuvars ve ince kum (FS) ile kuru ağırlıkça karıştırılmıştır. Sonuçlar, koni batma miktarının, kum-kil karışımlarının su içeriği tarafından yönetildiğini göstermiştir. Kumun koni penetrasyonu % 30 kaolin ilavesine kadar azalırken, daha sonra% 30 ila% 100 kaolin arasında artmıştır, ancak bentonit için % 0'dan% 100'e kadar bentonit içeriği ile artmıştır. Farklı karışım türleri için Casagrande ve düşen koni deneyleri arasında farklı denklemler önerilmiştir. Likit limit değerlerinin, bentonit-kum karışımları için, kaolin-kum karışımlarının daha yüksek olduğu bulunmuştur. 

Keywords

• Kum kil karışımları,düşen koni deneyi,Casagrande deneyi,likit limit

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