Geomechanics and Engineering

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Performance of cement-stabilized sand subjected to freeze-thaw cycles

  • Jumassultan, Assel (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Sagidullina, Nazerke (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Kim, Jong (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Ku, Taeseo (Department of Civil and Environmental Engineering, National University of Singapore) ;
  • Moon, Sung-Woo (Department of Civil and Environmental Engineering, Nazarbayev University)
  • Received : 2020.12.16
  • Accepted : 2021.02.20
  • Published : 2021.04.10
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Abstract

In cold regions, the integrity of the infrastructures built on weak soils can be extensively damaged by weathering actions due to the cyclic freezing and thawing. This damage can be mitigated by exploiting soil stabilization techniques. Generally, ordinary Portland cement (OPC) is the most commonly used binding material for investigating the chemo-hydromechanical behavior. However, due to the environmental issue of OPC producing a significant amount of carbon dioxide emission, calcium sulfoaluminate (CSA) cement can be used as one of the eco-sustainable alternatives. Although recently several studies have examined the strength development of CSA treated sand, no research has been concerned about CSA cement-stabilized sand affected by cyclic freeze and thaw. This study aims to conduct a comprehensive laboratory work to assess the effect of the cyclic freeze-thaw action on strength and durability of CSA cement-treated sand. For this purpose, unconfined compressive strength (UCS) and ultrasonic pulse velocity (UPV) tests were performed on the stabilized soil specimens cured for 7 and 14 days which are subjected to 0, 1, 3, 5, and 7 freeze-thaw cycles. The test results show that the strength and durability index of the samples decrease with the increase of the freeze-thaw cycles. The loss of the strength and durability considerably decreases for all soil samples subjected to the freeze-thaw cycles. Overall, the use of CSA as a stabilizer for sandy soils would be an eco-friendly option to achieve sufficient strength and durability against the freeze-thaw action in cold regions.

Keywords

References

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