Compression Behaviour of Chlef Sand and Transition of Fines Content Using Pressure-Dependent Maximum Void Ratios of Sand

• Published in: Geotechnical and geological engineering 2022-04, Vol.40 (4), p.1675-1692
• Main Authors: Bouri, Djamel Eddine, Brahimi, Abdelkader, Krim, Abdallah, Arab, Ahmed, Najser, Jan, Mašín, David
• Format: Article
• Language: English
• Subjects: Civil Engineering; Coefficients; Compressibility; Compression; Density; Earth and Environmental Science; Earth Sciences; Geotechnical Engineering & Applied Earth Sciences; Hydrogeology; Initial conditions; Methods; Original Paper; Pressure dependence; Relative density; Sand; Terrestrial Pollution; Uniformity coefficient; Void ratio; Voids; Waste Management/Waste Technology
• ISSN: 0960-3182; 1573-1529
• DOI: 10.1007/s10706-021-01985-8

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 œdometric 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 (C c-s ). Moreover increasing the density from 65 to 80% decreased both coefficients (C c ) and (C c-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 (C c-s ) and the effective diameter (D 10 ), the average diameter (D 50 ) and the uniformity coefficient (C u ).