Influence of the Diatomite Specie on the Peak and Residual Shear Strength of the Fine-Grained Soil

Diatomite is a powdering mineral mainly composed of diatom microfossils present in marine and lacustrine soils, which influences their physical and mechanical properties. Although many articles have been found in the literature concerning the influence of diatomite in the overall behavior of natural...

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Bibliographic Details
Published in:Applied sciences 2021-02, Vol.11 (4), p.1352
Main Authors: Slebi-Acevedo, Carlos J., Zuluaga-Astudillo, Daniel A., Ruge, Juan C., Castro-Fresno, Daniel
Format: Article
Language:English
Subjects:
annular shear strength test
Atterberg limits
diatom
Diatomaceous earth
diatomite
Fine-grained soils
Fossils
Friction
kaolin
marine soil
Mechanical properties
Microorganisms
Particle size
Physical properties
Powdering
residual
Scanning electron microscopy
Shear strength
Soil analysis
Soil mechanics
Soil mixtures
Soil strength
Soils
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Summary:Diatomite is a powdering mineral mainly composed of diatom microfossils present in marine and lacustrine soils, which influences their physical and mechanical properties. Although many articles have been found in the literature concerning the influence of diatomite in the overall behavior of natural soils, few research efforts have been carried out to evaluate the influence of the diatom microfossil species on their shear resistance. Therefore, in this research, the influence of the diatomite species and the content in the peak and the residual shear strength of diatomite-fine grained soil mixtures was analyzed using the annular shear strength test. Scanning electron microscopy (SEM) and Atterberg limits were also carried out as additional tests to explain the interlocking effect between the microfossils and the soil. Overall, both diatomite species increased both peak and residual shear strength of the soil similar to dense sands. Nevertheless, the Mexican species reveal higher friction angle values compared with Colombian species.
ISSN:2076-3417
2076-3417
DOI:10.3390/app11041352