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Small strain stiffness of graded sands with light biocementation
https://orcid.org/http://orcid.org/0000-0002-9411-4660
Particle size gradation is an important parameter for small strain stiffness of sand, and it can also affect the biocementation behavior. In this study, a series of isotropic consolidation tests were performed to study the gradation-dependent small strain shear modulus of a glass sand with light biocementation. Shear wave velocities in multi-directions were measured with bender elements. The test results showed that the small strain shear modulus G0 and stiffness anisotropy decrease and increase with the increase in uniformity coefficient Cu, respectively, for the uncemented sand. When sands were biocemented, the decrement of G0 gradually vanishes with biocementation level, showing that G0 increases with Cu. The development of G0 ratios between the biocemented and the uncemented sands generally experiences four stages. The stiffness anisotropy is also changed with biocementation, showing the decrease in stiffness ratio especially for the unloading stages. The changes of stiffness anisotropy are more explicit for the sands with higher Cu and biocementation level.
Small strain stiffness of graded sands with light biocementation
https://orcid.org/http://orcid.org/0000-0002-9411-4660
Particle size gradation is an important parameter for small strain stiffness of sand, and it can also affect the biocementation behavior. In this study, a series of isotropic consolidation tests were performed to study the gradation-dependent small strain shear modulus of a glass sand with light biocementation. Shear wave velocities in multi-directions were measured with bender elements. The test results showed that the small strain shear modulus G0 and stiffness anisotropy decrease and increase with the increase in uniformity coefficient Cu, respectively, for the uncemented sand. When sands were biocemented, the decrement of G0 gradually vanishes with biocementation level, showing that G0 increases with Cu. The development of G0 ratios between the biocemented and the uncemented sands generally experiences four stages. The stiffness anisotropy is also changed with biocementation, showing the decrease in stiffness ratio especially for the unloading stages. The changes of stiffness anisotropy are more explicit for the sands with higher Cu and biocementation level.
Small strain stiffness of graded sands with light biocementation
https://orcid.org/http://orcid.org/0000-0002-9411-4660
Particle size gradation is an important parameter for small strain stiffness of sand, and it can also affect the biocementation behavior. In this study, a series of isotropic consolidation tests were performed to study the gradation-dependent small strain shear modulus of a glass sand with light biocementation. Shear wave velocities in multi-directions were measured with bender elements. The test results showed that the small strain shear modulus G0 and stiffness anisotropy decrease and increase with the increase in uniformity coefficient Cu, respectively, for the uncemented sand. When sands were biocemented, the decrement of G0 gradually vanishes with biocementation level, showing that G0 increases with Cu. The development of G0 ratios between the biocemented and the uncemented sands generally experiences four stages. The stiffness anisotropy is also changed with biocementation, showing the decrease in stiffness ratio especially for the unloading stages. The changes of stiffness anisotropy are more explicit for the sands with higher Cu and biocementation level.
Small strain stiffness of graded sands with light biocementation
Acta Geotech.
Shi, Jinquan (author) / Li, Haoyu (author) / Xiao, Yang (author) / Hu, Jian (author) / Haegeman, Wim (author) / Liu, Hanlong (author)
Acta Geotechnica ; 18 ; 5273-5284
2023-10-01
12 pages
Article (Journal)
Electronic Resource
English
Biocementation , MICP , Particle size gradation , Shear wave velocity , Small strain stiffness Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
Large-Scale Comparison of Bioaugmentation and Biostimulation Approaches for Biocementation of Sands
| British Library Online Contents | 2017
Large-Scale Comparison of Bioaugmentation and Biostimulation Approaches for Biocementation of Sands
| Online Contents | 2017