Stabilization Of Sulfate-Rich Soils Mixed With Siliceous Sand At Varying Ratios Using Portland Cement, Sulfate-Resistant Cement, Fly Ash, And Lime

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Horuz A. G., Şadoğlu E.

TURKISH JOURNAL OF CIVIL ENGINEERING, cilt.38, sa.3, ss.1-23, 2027 (SCI-Expanded, TRDizin)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38 Sayı: 3
  • Basım Tarihi: 2027
  • Dergi Adı: TURKISH JOURNAL OF CIVIL ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.1-23
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

Sulfate-rich soils (SRS) are commonly located in various regions of the world, including in USA. In current studies, it has been detected that stabilization of the soils, containing excessive amounts of sulfates or organic matter, using calcium-containing binders can result in undesirable phenomena, including heaving, swelling, cracking, and fracturing. In light of these challenges, this study initially involved blending SRS with siliceous sand (SS) at varying ratios to produce soil mixtures of different sulfate content. These mixtures were then stabilized using different binders, namely ordinary Portland cement (CEM I 42.5), sulfateresistant cement (CEM I 42.5-R-SR5), Class F fly ash (FFA), and lime. The prepared samples underwent curing for 7 and 28 days, after which unconfined compressive strength (UCS) tests were performed. Following the 28-day curing period, durability tests were also conducted to assess the long-term performance of the stabilized specimens. The results from both strength and durability evaluations are presented in tabular and graphical formats. Among the various combinations tested, the best performance in terms of both strength and durability was achieved with a mixture containing 25% sulfate soil and 75% siliceous sand, stabilized with 20% CEM I 42.5-R-SR5. Conversely, the poorest performance was observed in the specimen comprising a 50:50 sulfate soil–siliceous sand mixture stabilized with 10% CEM I 42.5-R-SR5