CH Sınıfı Kilin Yüksek Fırın Cürufu ve Nano-SiO₂ ile Stabilizasyonunda Zamana Bağlı Dayanım Gelişimi

Öz

Bu çalışma, laboratuvar koşullarında yapay olarak üretilen yüksek plastisiteli kil (CH) zeminin stabilizasyonunda yüksek fırın cürufu (YFC), Nano-SiO₂ (NS) ve bu katkıların birlikte kullanımının (YFC+NS) serbest basınç dayanımı üzerindeki zamana bağlı etkilerini incelemektedir. Bu amaçla yapay zemine %10, %20, %30 ve %40 YFC, tek başına %1.5 NS ve her YFC oranıyla birlikte %1.5 NS ilave edilerek toplam on farklı karışım hazırlanmıştır. Numuneler 0, 7, 30 ve 60 gün süreyle kür edilmiş ve serbest basınç dayanımları belirlenmiştir. Sonuçlar, YFC katkısının tüm oran ve kür sürelerinde dayanımı artırdığını göstermiştir. En yüksek dayanım değeri 60 günlük kür sonunda %40 YFC içeren karışımda elde edilmiş ve aynı kür süresindeki referans numuneye göre yaklaşık %142 oranında artış sağlamıştır. NS tek başına dayanımı artırmasına rağmen etkisi YFC’ye kıyasla daha sınırlı kalmıştır. YFC+NS karışımlarında dayanım gelişimi kür süresi ve katkı oranına bağlı olarak değişmiş, yüksek YFC içeriklerinde NS ilavesinin ilave dayanım kazancı sağlamadığı belirlenmiştir.

Anahtar Kelimeler

• Nano-SiO2
• Serbest basınç dayanımı
• Yüksek fırın cürufu
• Yüksek plastisiteli kil
• Zemin stabilizasyonu

Time-Dependent Strength Development of CH Clay Stabilized with Ground Granulated Blast Furnace Slag and Nano-SiO₂

Öz

This study investigates the time-dependent effects of ground granulated blast furnace slag (GGBFS), nano-silica (NS), and their combined use (GGBFS+NS) on the unconfined compressive strength (UCS) of an artificially prepared high-plasticity clay (CH). A total of ten mixtures were prepared by incorporating 10%, 20%, 30%, and 40% GGBFS, 1.5% NS alone, and 1.5% NS combined with each GGBFS content into the artificial soil. The specimens were cured for 0, 7, 30, and 60 days, after which UCS tests were conducted. The results showed that GGBFS significantly improved the UCS at all contents and curing periods. The highest strength was obtained in the mixture containing 40% GGBFS after 60 days of curing, exhibiting an approximately 142% increase compared with the reference specimen at the same curing age. Although NS used alone enhanced the strength of the soil, its contribution was more limited than that of GGBFS. In the GGBFS+NS mixtures, strength development varied depending on curing duration and additive content. However, it was determined that NS did not provide an additional strength gain at high GGBFS contents.

Anahtar Kelimeler

• Ground granulated blast furnace slag
• High-plasticity clay
• Nano-SiO2
• Soil stabilization
• Unconfined compressive strength

Kaynakça

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