Kireç ve Uçucu Kül ile Stabilize Edilmiş Donma-Çözülme Döngülü Alüvyonel Zeminlerin Performansına İlişkin Karşılaştırmalı Bir Çalışma

Year 2025, Volume: 15 Issue: 3, 1094 - 1118, 15.09.2025

Eylem Arslan , Inci Develioglu , Hasan Fırat Pulat

https://doi.org/10.31466/kfbd.1609555

Abstract

Bu çalışma, alüvyonlu zeminlerin kireç ve uçucu kül ile stabilizasyonunun bir karşılaştırmasını oluşturmakta ve elde edilen deney sonuçları doğrultusunda bu zeminler için temel çıkarımlarda bulunmayı amaçlamaktadır. Bu bağlamda, siltli alüvyonlu zemine farklı oranlarda kireç ve uçucu kül ilave edilmiş ve numuneler farklı sürelerde kürlenmiştir. Kürlenen numuneler, sıcaklık değişimlerinin etkisini de içerecek şekilde, -24 ve +24 C˚'de 24 saat tutularak kapalı sistem bir dolapta 0 ve 1 donma-çözülme çevrimlerine maruz bırakılmıştır. Konsolidasyonsuz-drenajsız üç eksenli deneylerle elde edilen drenajsız kayma dayanımı değerinden yapılan çıkarımlarda, alüvyonlu zeminin silt bakımından zengin olması nedeniyle uçucu kül ile stabilizasyonun kireç ile stabilizasyondan daha iyi sonuç verdiği sonucuna ulaşılmıştır. Her iki stabilizatör için de en optimum stabilizasyon süresi 28 gün olarak belirlenmiştir. Kür süresinin artması, sülfat içeren bir ortamda kalsiyum bazlı stabilizatörlerin kullanılması sonucu oluşabilecek mekanizmalardan etkilenmiştir. Bu, kireçle stabilizasyonda en belirgin şekilde görülmüştür. En etkili stabilizasyon kireç için %3 ila 6 arasında elde edilirken, bu oran uçucu kül için %20'ye kadar çıkmıştır. Ancak, kireçle stabilize edilmiş alüvyonlu zeminler donma-çözülme döngüsüne karşı daha iyi direnç sağlamıştır.

Keywords

Alüvyonel zemin , Donma-çözülme , Kireç , Uçucu kül , Üç eksenli basınç deneyi

A Comparative Study on the Performance of Freeze-Thaw Cycled Alluvial Soils Stabilized with Lime and Fly Ash

Abstract

This paper presents a comparison of the stabilization of alluvial soils using lime and fly ash. It aims to draw basic inferences for these soils based on the test results obtained. In this regard, lime and fly ash were added to silty alluvial soil at different rates, and the s1amples were subjected to different curing periods. The cured samples underwent 0 and 1 freeze-thaw cycles in a closed-system cabinet by maintaining the specimens at -24°C and +24°C for 24 hours each, to evaluate the influence of temperature changes. Based on the undrained shear strength values obtained from the unconsolidated-undrained triaxial tests, the most prominent finding is that stabilization with fly ash performed better than with lime, as the alluvial soil was rich in silts. The optimal stabilization period was determined as 28 days for both stabilizers. The increased curing time was influenced by mechanisms potentially arising from the use of calcium-based stabilizers in a sulfate-containing environment, which was most evident in lime stabilization. While the most effective lime stabilization was achieved between 3% and 6%, this range increased to as much as 20% for fly ash. Although fly ash stabilization yielded better results in terms of undrained shear strength, lime stabilization demonstrated better performance against freeze-thaw cycles.

Keywords

Alluvial soil , Fly ash , Freeze-thaw , Lime , Triaxial compression test

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