Investigation of the Strength Properties of Clayey Soils Stabilized with Rice Husk Ash Lime and Cement

Yıl 2025, Cilt: 8 Sayı: 2, 42 - 52, 31.12.2025

Serhat Uz , Erdinç Keskin , Mehmet Özgür

Öz

This study investigates the improvement of a highly plastic clay soil using lime, cement, and rice husk ash, as well as the effects of these additives on the soil’s strength properties. In the experimental program, a clay sample obtained from Asilbeyli Village in Kırklareli Province was used. After determining the engineering properties of the natural soil, lime, cement, and rice husk ash were added to the soil in different proportions, both individually and in various combinations. Subsequently, unconfined compressive strength (UCS) and California Bearing Ratio (CBR) test specimens were prepared. The specimens were cured for 1, 7, 28, and 90 days, after which UCS and CBR tests were conducted. The results indicated that lime and cement significantly improved the soil strength, while rice husk ash, owing to its pozzolanic properties, further enhanced the effectiveness of these additives. In particular, for the lime–rice husk ash combination, the unconfined compressive strength increased approximately sevenfold, and the CBR value increased fivefold after 90 days of curing. The use of rice husk ash provides a sustainable approach to soil improvement from both economic and environmental perspectives. Therefore, the combination of rice husk ash with lime and cement emerges as an effective and eco-friendly alternative for enhancing the bearing capacity of weak soils.

Anahtar Kelimeler

Soil stabilization , rice husk ash , lime , cement , unconfined compressive strength.

Pirinç Kabuğu Külü, Kireç ve Çimento ile İyileştirilen Killi Zeminlerin Dayanım Özelliklerinin İncelenmesi

Öz

Bu çalışmada, yüksek plastisiteli killi bir zeminin kireç, çimento ve pirinç kabuğu külü ile iyileştirilmesi ve bu iyileştirmelerin zeminin dayanım özelliklerine etkileri araştırılmıştır. Deneysel çalışmalarda, Kırklareli İli Asilbeyli Köyü’nden temin edilen bir kil numunesi kullanılmıştır. Doğal zeminin mühendislik özellikleri belirlendikten sonra, zemine farklı oranlarda kireç, çimento ve pirinç kabuğu külü katkıları hem tek başına hem de çeşitli kombinasyonlar hâlinde ilave edilmiştir. Daha sonra serbest basınç ve California Taşıma Oranı (CBR) deney numuneleri hazırlanmıştır. Numuneler 1, 7, 28 ve 90 günlük kür sürelerine tabi tutularak serbest basınç mukavemeti ve CBR deneyleri gerçekleştirilmiştir. Elde edilen sonuçlar, kireç ve çimento katkılarının zeminin dayanımını önemli ölçüde artırdığını, pirinç kabuğu külünün ise puzolanik özellikleri sayesinde bu katkıların etkinliğini belirgin biçimde yükselttiğini göstermiştir. Özellikle kireç–pirinç kabuğu külü kombinasyonunda, 90 günlük kür sonunda serbest basınç dayanımının yaklaşık yedi kat, CBR değerinin ise beş kat arttığı belirlenmiştir. Pirinç kabuğu külü kullanımı hem ekonomik hem de çevresel açıdan sürdürülebilir bir zemin iyileştirme yaklaşımı sunmaktadır. Bu nedenle, kireç ve çimento ile birlikte pirinç kabuğu külü kullanımı, zayıf zeminlerin taşıma gücünü artırmada etkili ve çevre dostu bir alternatif olarak öne çıkmaktadır.

Anahtar Kelimeler

Zemin iyileştirilmesi , pirinç kabuğu külü , kireç , çimento , serbest basınç mukavemeti.

Kaynakça

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