FREEZE-THAW BEHAVIOR OF GYPSEOUS SOIL

  • Abdulrahman ALDAOOD Department of Civil, College of Engineering, University of Mosul, , Mosul, Iraq
  • Marwen BOUASKER Department of Civil, College of Engineering, University of Orleans, France
  • Amina KHALIL Department of Civil, College of Engineering, University of Mosul, , Mosul, Iraq
  • Ibrahim ALKIKI Department of Civil, College of Engineering, University of Mosul, , Mosul, Iraq
  • Muzahim AL-MUKHTAR Department of Civil, College of Engineering, University of Orleans, France
Keywords: Gypseous soil; freeze-thaw; UCS, mercury porosity; gas permeability.

Abstract

This research work studied the influence of freeze-thaw (F-T) cycles and gypsum percent on the mechanical properties and durability of clayey soil. Different amount of gypsum percent (varied between 0-25%) was added to the clayey soil and subjected to 12 F-T cycles. The unconfined compressive strength UCS, P-wave velocity, gas permeability, pore size distribution and volume changes properties were measured for both un-cycled and F-T cycled samples. The tests results presented that the UCS, gas permeability and porosity values of samples influenced by F-T cycles. These values depend considerably on the amounts of gypsum percent and F-T cycles. Further, changes in soil porosity were observed during F-T cycles due to ice lenses formation and cracks propagation. Finally, the UCS, gas permeability and volume change values have been proposed to be used to evaluate extent of durability of soil samples.

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Published
2019-08-09
How to Cite
ALDAOOD, A., M. BOUASKER, A. KHALIL, I. ALKIKI, and M. AL-MUKHTAR. “FREEZE-THAW BEHAVIOR OF GYPSEOUS SOIL”. ZANCO Journal of Pure and Applied Sciences, Vol. 31, no. s3, Aug. 2019, pp. 405-9, doi:10.21271/ZJPAS.31.s3.58.