Tüf katkılı yüksek plastisiteli killerde kıvam limitleri ve şişme potansiyeli ilişkisi

Bu çalışmada asidik ve bazik tüf katkısının yüksek plastisiteli kilin kıvam limitleri ile şişme potansiyeline olan etkileri ve bu özellikler arasındaki ilişkileri incelenmiştir. Bu amaçla %5, 10, 15 ve 20 oranlarında asidik tüf ve bazik tüf katkıları içeren örnekler optimum su içeriğinde sıkıştırılarak kür öncesi ve 28 günlük kür sonrasındaki kıvam limitleri, şişme basıncı ve şişme yüzdesi belirlenmiştir. Katkısız kil ve tüf katkılı örneklerde şişme basıncı ve şişme yüzdesi değişimlerinin kıvam limitleriyle olan ilişkisi incelenmiştir. Yapılan deneysel çalışmalar sonucunda artan katkı oranı ve kür etkisiyle hem LL hem de PI değerlerinde azalmalar, PL değerlerinde ise artma ve azalmalar oluşmuştur. Örneklerin şişme basıncı ve şişme yüzdesi değerleri de artan katkı oranı ile azalmıştır. Regresyon analizi sonuçlarına göre asidik tüf katkılı örneklerin LL, PL ve PI ile şişme basıncı ve şişme yüzdesi arasında çok kuvvetli-kuvvetli pozitif ilişkilerin olduğu belirlenmiştir. Bazik tüf katkılı örnekler de ise LL ve PI ile şişme basıncı ve şişme yüzdesi arasında çok kuvvetli bir pozitif ilişkiler bulunurken, PL ile şişme basıncı ve şişme yüzdesi arasında herhangi bir anlamlı ilişki belirlenememiştir.

Anahtar Kelimeler:

Tüf, Likit Limit, Plastik limit, Şişme basıncı, Şişme yüzdesi, Regresyon analizi

Consistency limits and swelling potential relationship in tuff added high plasticity clays

In this study, the effects of acidic and basic tuff additives on the consistency limits and swelling potential of high plasticity clay and the relationship between these properties were investigated. For this purpose, samples containing 5, 10, 15 and 20% acidic tuff and basic tuff additives were compressed at optimum water content, and the consistency limits, swelling pressure and swelling percentage were determined before and after curing for 28 days. The relationship of swelling pressure and swelling percentage changes with consistency limits in pure clay and tuff added samples was investigated. As a result of the experimental studies, decreases in both LL and PI values, and increases and decreases in PI values have occurred with increasing additive ratio and curing effect. Swelling pressure and swelling percentage values of the samples also decreased with increasing additive ratio. According to the results of the regression analysis, it was determined that there were very strong positive relationships between LL, PL and PI of the acidic tuff added samples, with swelling pressure and swelling percentage. In the basic tuff added samples, there was a very strong positive relationship between LL and PI with swelling pressure and swelling percentage, but no significant relationship was found between PL with swelling pressure and swelling percentage.

Keywords:

Liquid limit, Plastic limit, Regression analysis, Swelling pressure, Swelling percentage, Tuff,

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