Triaxial Test Behavior of calcium sulfoaluminate (CSA)-treated Sand with High Confining Pressure

James Innocent Ocheme, Sakiru Olarewaju Olagunju, Ruslan Khamitov, Alfrendo Satyanaga, Jong Kim, Sung-Woo Moon

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Abstract

Cementitious materials such as Ordinary Portland Cement (OPC), fly ash, lime, and bitumen have been employed for soil improvement over the years. However, due to the environmental concerns associated with the use of OPC, substituting OPC with calcium sulfoaluminate (CSA) cement offers good potential for ground improvement because it is more eco-friendly. Although earlier research has investigated the stabilizing effects of CSA cement-treated sand, no attempt has been made to examine soil behavior under high confining pressure. As a result, this study aimed to investigate the shear strength and mechanical behavior of CSA cement-treated sand using a consolidated drained (CD) triaxial test with high confining pressure. The microstructure of the examined sand samples was investigated using scanning electron microscopy. This study used sand with CSA cement contents of 3%, 5%, and 7% and confining pressures of 0.5, 1.0, and 1.5 MPa. It revealed that the confining pressures and CSA cement content significantly affected the stress-strain and volumetric change behavior of CSA cement-treated sand at high confining pressures.
Original languageEnglish
Pages (from-to)41-51
JournalGeomechanics and Engineering
Volume33
Issue number1
Publication statusPublished - 2023

Keywords

  • calcium sulfoaluminate
  • consolidated drained triaxial test
  • high pressure
  • shear strength
  • volume change

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