Strength characteristics of sand–silt mixtures subjected to cyclic freezing-thawing-repetitive loading

Jong Sub Lee, Jung Doung Yu, Kyungsoo Han, Sang Yeob Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Daily freezing-thawing-repetitive loading is a critical factor affecting soil stability. This study assesses the strength of sand–silt mixtures with various silt fractions (SFs) subjected to cyclic freezing-thawing-repetitive loading. Specimens with SF of 0–100% were prepared with a fixed relative density of 60%. The number of repetitive loadings (N) was 1, 100, and 1000 for each specimen with different SFs. After three cycles of freezing-thawing-repetitive loading, the specimens were frozen at −5C for the uniaxial compression test. Test results show that the change in relative density (∆Dr) increases with the increase in SF up to 30% and decreases as SF increases beyond 30% owing to the change in the void ratio. The volumetric unfrozen water content (θu) increases with the increase in both SF and N owing to the effect of the physicochemical characteristics of soils on small voids. Unconfined compressive strength of sand-dominant mixtures (SF ≤ 30%) is reinforced by ∆Dr. By contrast, for silt-dominant mixtures (SF > 30%), the unconfined compressive strength decreases with the increase in θu and N due to lubricant role and sands dispersion. Thus, the effects of SF and N should be considered for sand–silt mixtures that have a probability to undergo cyclic freezing-thawing-repetitive loading.

Original languageEnglish
Article number5381
Pages (from-to)1-17
Number of pages17
JournalSensors (Switzerland)
Volume20
Issue number18
DOIs
Publication statusPublished - 2020 Sep 2

Keywords

  • Freezing-thawing-repetitive loading
  • Sand–silt mixtures
  • Silt fraction
  • Unconfined compressive strength
  • Volumetric unfrozen water content

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

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