Journal
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
Volume 40, Issue 4, Pages 1675-1692Publisher
SPRINGER
DOI: 10.1007/s10706-021-01985-8
Keywords
Fine content; Water content; OEdometric; Compression; Void ratio
Categories
Funding
- Czech Ministry of Education, Youth and Sports [LTACH19028]
- Center for Geosphere Dynamics [UNCE/SCI/006]
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This study examines the compressibility behavior of Chlef sand, specifically looking at the impact of fines content, relative density, and initial conditions. The results show that higher fines content leads to increased compressibility coefficients, while higher density decreases these coefficients. Additionally, the method of sample preparation can also affect the compressibility performance.
This paper presents a study on Chlef sand to examine the effect of fines content (F-c), relative density (RD) and initial conditions on the compressibility behavior. The interpretation of the results is based on the concept of the intergranular voids ratio (e(s)) and two hypoplastic parameters model Hs and n for calculation of the maximum voids ratio. The cedometric tests results made in the laboratory show that the fines content transition (F-ct) of Chlef sand is in good agreement with the results published in the literature. The results obtained indicate that the higher value of fines fraction (F-c) in the sand cause an increase in the compressibility coefficient (C-c) and the granular compressibility coefficient (Cc-s). Moreover increasing the density from 65 to 80% decreased both coefficients (C-c) and (Cc-s). The samples prepared with the moist tamping method (w = 3%) have compressibility coefficients greater than samples prepared by the dry pluviation method (w = 0%). We have shown that the fines content transition (F-ct) depends on the initial state of the samples (relative density, preparation method and maximum void ratio). Finally the granulometric characteristics (D-10, D-50 and C-u) have a significant effect on compression behavior. Nevertheless a good exponential correlation has been found between the compressibility coefficient (C-c), the granular compressibility coefficient (Cc-s) and the effective diameter (D-10), the average diameter (D-50) and the uniformity coefficient (C-u).
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