Uçucu kül, silis dumanı ve cam elyaf kullanılarak iyileştirilen kilin mühendislik performansının değerlendirilmesi

Öz

Bu çalışmada mineral katkı ve lif kullanılarak iyileştirilen killi zeminin mühendislik özellikleri incelenmiştir. Bu amaçla killi zemine %5, %10, %20 oranlarında uçucu kül ile silis dumanı, %1, %1,5, %2 oranlarında cam elyaf eklenmiştir. Katkı maddeleri ile stabilize edilen zeminin fiziksel özelliklerini belirlemek için Atterberg limitleri ve Proktor deneyi uygulanmıştır. Dayanım özelliklerini değerlendirebilmek için stabilize edilmiş killi zemine farklı kür sürelerinde ve farklı su içeriklerinde tek eksenli basınç testi uygulanmıştır. Deneylerin sonucunda, silis dumanı ve uçucu kül katkılarının kil zeminin plastisite indeksi ve likit limit değerlerinde azalmaya neden olduğu görülmüştür. Silis dumanının %20 oranında ilave edilmesiyle plastisite indeksi %2,080 azalırken, %20 uçucu kül ilave edilmesiyle %0,042 azalmıştır. Serbest basınç dayanım değerleri incelendiğinde, su içeriğinin artmasıyla birlikte killi zeminin UCS dayanımı azalmıştır. Optimum su içeriğinden düşük su içeriğine sahip killi zemin daha büyük UCS dayanımına sahipken, mineral katkı ve lif ilave edilmesiyle UCS dayanımı artmıştır. Silis dumanının UCS değerleri üzerinde daha etkili olduğu gözlenmiştir. Su içeriği arttıkça killi zeminin UCS yenilme mukavemetinin azaldığı görülmüştür. Silis dumanı, uçucu kül ve cam elyaf ilave edilen kil numunelerinin kırılganlık indeksi değerlerinin, optimum su içeriğinde doğal kil numunelerine göre daha kırılgan hale geldiği görülmüştür. Elde edilen sonuçlar, kil zeminine ilave edilen mineral katkı malzemelerinin ve liflerin zeminin fiziksel ve mühendislik özellikleri üzerinde etkili olduğunu göstermiştir.

Anahtar Kelimeler

• uçucu kül
• silis dumanı
• cam elyaf
• zemin stabilizasyonu
• UCS

Evaluation of the engineering performance of clay improved using fly ash, silica fume and glass fiber.

Öz

This study investigated the engineering properties of clayey soil enhanced through the incorporation of mineral additives and fibers. To achieve this objective, silica fume and fly ash were introduced to the clayey soil at ratios of 5%, 10%, and 20%, and glass fibers were incorporated at ratios of 1%, 1.5%, and 2%. Atterberg limits and Proctor tests were performed to assess the physical characteristics of the soil treated with additives. Unconfined compressive strength tests (UCS) were executed on the treated clayey soil, considering various curing durations, and diverse water contents to assess its strength attributes. Experiment results indicated that the inclusion of silica fume and fly ash led to a reduction in the plasticity index and liquid limit values of the clay soil. Specifically, the plasticity index decreased by 2.080% with the addition of 20% silica fume, and 20% fly ash resulted in a decrease of 0.042%. Analysis of UCS values revealed a decrease in the strength of the clayey soil as the water content rises. The clayey soil exhibited higher UCS strength below the optimum water level, and the introduction of mineral additives and fibers further enhanced this strength. Silica fume exhibited a more pronounced impact on UCS values. An increase in water content caused a decrease in the UCS of the clayey soil. The brittle index values of clay samples containing silica fume, fly ash, and glass fibers indicated increased brittleness compared to natural clay samples at the optimum water content. These findings underscore the positive influence of added mineral additives and fibers on the physical and engineering properties of clay soil.

Anahtar Kelimeler

• soil stabilization
• fly ash
• silica fume
• glass fiber
• UCS

Kaynakça

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