Strength Characteristics of Sand-Silt Mixtures Subjected to Cyclic Freezing-Thawing-Repetitive Loading
- Authors
- Lee, Jong-Sub; Yu, Jung-Doung; Han, Kyungsoo; Kim, Sang Yeob
- Issue Date
- 9월-2020
- Publisher
- MDPI
- Keywords
- freezing-thawing-repetitive loading; sand& #8211; silt mixtures; silt fraction; unconfined compressive strength; volumetric unfrozen water content
- Citation
- SENSORS, v.20, no.18
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS
- Volume
- 20
- Number
- 18
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/53666
- DOI
- 10.3390/s20185381
- ISSN
- 1424-8220
- 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 -5 degrees C for the uniaxial compression test. Test results show that the change in relative density ( increment D-r) 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 (theta(u)) 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 increment D-r. By contrast, for silt-dominant mixtures (SF > 30%), the unconfined compressive strength decreases with the increase in theta(u) 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.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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