Investigation of the Freeze-Thaw Resistance of Road Subgrade Soils Stabilized Using Metakaolin

Tacettin Geçkil; Talha Sarıcı; Bahadır Karabaş

Makale detayları

Investigation of the Freeze-Thaw Resistance of Road Subgrade Soils Stabilized Using Metakaolin

Yazarlar:

Tacettin Geçkil | Talha Sarıcı | Bahadır Karabaş

Yayıncı:

Osmaniye Korkut Ata Üniversitesi

Ana Başlıklar:

Ulaştırma Mühendisliği

Dergi:

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.8 Issue 3, pp.1278-1300

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344711

pISSN:

2687-3729

Anahtar kelimeler:

Özet:

 Designing structures planned for different climatic conditions to be resistant to natural conditions is one of the important engineering requirements. For highways, the selection of stabilizer materials that are resistant to climatic freeze-thaw cycles is an important consideration in enhancing the strength of road subgrades. In this study, the stabilization of two different soils, considered as road subgrades, with metakaolin MK and the freeze-thaw resistance of these stabilized soils were investigated. Samples without additives and with different proportions of MK were prepared using clayey and sandy soils. A standard Proctor test was applied to these samples. Subsequently, unconfined compression tests were conducted on the prepared samples both with and without additives after a 7-day curing period. It was observed that the strength increased in the prepared mixtures, and the highest strengths were obtained in mixtures containing 6 MK for clayey soils and 12 MK for sandy soils. Then, based on the samples without additives and those with the optimum MK ratios, soil samples were prepared for the freeze-thaw test application. The samples that completed the 7-day curing period were subjected to 3, 6, and 12 freeze-thaw cycles. Each cycle consisted of freezing the samples for 24 hours at -23C in a freeze-thaw cabinet, followed by thawing for 23 hours at 23  2C. The unconfined compressive strength values obtained after the 7-day curing period 0 cycles were used for comparison. As a result of the tests and comparisons, it was determined that the strength and freeze-thaw resistance of both soils increased with the addition of MK.

 Designing structures planned for different climatic conditions to be resistant to natural conditions is one of the important engineering requirements. For highways, the selection of stabilizer materials that are resistant to climatic freeze-thaw cycles is an important consideration in enhancing the strength of road subgrades. In this study, the stabilization of two different soils, considered as road subgrades, with metakaolin MK and the freeze-thaw resistance of these stabilized soils were investigated. Samples without additives and with different proportions of MK were prepared using clayey and sandy soils. A standard Proctor test was applied to these samples. Subsequently, unconfined compression tests were conducted on the prepared samples both with and without additives after a 7-day curing period. It was observed that the strength increased in the prepared mixtures, and the highest strengths were obtained in mixtures containing 6 MK for clayey soils and 12 MK for sandy soils. Then, based on the samples without additives and those with the optimum MK ratios, soil samples were prepared for the freeze-thaw test application. The samples that completed the 7-day curing period were subjected to 3, 6, and 12 freeze-thaw cycles. Each cycle consisted of freezing the samples for 24 hours at -23C in a freeze-thaw cabinet, followed by thawing for 23 hours at 23  2C. The unconfined compressive strength values obtained after the 7-day curing period 0 cycles were used for comparison. As a result of the tests and comparisons, it was determined that the strength and freeze-thaw resistance of both soils increased with the addition of MK.

 Designing structures planned for different climatic conditions to be resistant to natural conditions is one of the important engineering requirements. For highways, the selection of stabilizer materials that are resistant to climatic freeze-thaw cycles is an important consideration in enhancing the strength of road subgrades. In this study, the stabilization of two different soils, considered as road subgrades, with metakaolin MK and the freeze-thaw resistance of these stabilized soils were investigated. Samples without additives and with different proportions of MK were prepared using clayey and sandy soils. A standard Proctor test was applied to these samples. Subsequently, unconfined compression tests were conducted on the prepared samples both with and without additives after a 7-day curing period. It was observed that the strength increased in the prepared mixtures, and the highest strengths were obtained in mixtures containing 6 MK for clayey soils and 12 MK for sandy soils. Then, based on the samples without additives and those with the optimum MK ratios, soil samples were prepared for the freeze-thaw test application. The samples that completed the 7-day curing period were subjected to 3, 6, and 12 freeze-thaw cycles. Each cycle consisted of freezing the samples for 24 hours at -23C in a freeze-thaw cabinet, followed by thawing for 23 hours at 23  2C. The unconfined compressive strength values obtained after the 7-day curing period 0 cycles were used for comparison. As a result of the tests and comparisons, it was determined that the strength and freeze-thaw resistance of both soils increased with the addition of MK.

 Farklı iklim koşullarında planlanan yapıların, tabiat şartlarına göre dirençli olarak tasarlanması önemli mühendislik gerekliliklerinden biridir. Karayollarının ise yol tabanlarının dayanımının arttırılmasına yönelik stabilizatör malzeme seçiminde, iklimsel donma ve çözülmeye dayanıklı malzemelerin kullanılması önemli bir tercih nedenidir. Bu çalışmada, yol tabanı olarak değerlendirilen iki farklı zeminin, metakaolin MK ile stabilizasyonu ve yapılan stabilizasyonların donma-çözülme direnci araştırılmıştır. Killi ve kumlu zeminlerle hazırlanan, katkısız ve farklı oranlardaki MK ilaveli numunelere standart Proktor deneyi uygulanmıştır. Ardından, hazırlanan katkısız ve katkılı serbest basınç deneyi örneklerine, 7 gün kür sonrası serbest basınç deneyi yapılmıştır. Hazırlanan karışımlarda dayanımın arttığı ve en yüksek dayanımların killi ve kumlu karışımlarda, sırasıyla 6 MK ve 12 MK içeren karışım numunelerinde elde edildiği görülmüştür. Akabinde, katkısız ve optimum MK oranları esas alınarak, donma-çözülme deneyinin uygulamasında kullanılacak zemin numuneleri hazırlanmıştır. 7 günlük kür süresini tamamlayan örneklere 3, 6, 12 döngü uygulanmıştır. Uygulanan her bir döngüde, hazırlanan numuneler 24 saat -23de donma-çözülme kabininde dondurulmuş, daha sonra 23 saat boyunca 23  2 de çözülmeye bırakılmıştır. Daha sonra kıyaslamada 7 gün kür süresi sonrası elde edilen serbest basınç mukavemeti değerleri 0 döngü kullanılmıştır. Yapılan deneyler ve kıyaslamalar neticesinde, her iki zeminin MK ilavesi ile dayanımının ve donma-çözülme direncinin arttığı tespit edilmiştir.

Makale detayları

Investigation of the Freeze-Thaw Resistance of Road Subgrade Soils Stabilized Using Metakaolin

Yazarlar:

Tacettin Geçkil | Talha Sarıcı | Bahadır Karabaş

Yayıncı:

Osmaniye Korkut Ata Üniversitesi

Ana Başlıklar:

Ulaştırma Mühendisliği

Dergi:

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.8 Issue 3, pp.1278-1300

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344711

pISSN:

2687-3729

Clayey soil

Sandy soil

Stabilization

Freeze thaw

Metakaolin

Transportation GeotechnicsKil

Kum

Donma Çözülme

Metakaolin

Ulaştırma Geotekniği

stabilizasyon

Sayı

Makale detayları

Yazarlar: Tacettin Geçkil | Talha Sarıcı | Bahadır Karabaş

Yayıncı: Osmaniye Korkut Ata Üniversitesi

Ana Başlıklar: Ulaştırma Mühendisliği

Dergi: Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.8 Issue 3, pp.1278-1300

Belge Tipi: Makale

Yayın Tarihi: 6/2025

Belge Dili: Türkçe

Document ID (Org No.): 2001344711

pISSN: 2687-3729

Sayı

Yazarlar:

Tacettin Geçkil | Talha Sarıcı | Bahadır Karabaş

Yayıncı:

Osmaniye Korkut Ata Üniversitesi

Ana Başlıklar:

Ulaştırma Mühendisliği

Dergi:

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi Vol.8 Issue 3, pp.1278-1300

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001344711

pISSN:

2687-3729