Microstructure development in lacustrine, fine-grained sediments traced by in situ and laboratory testing

Soil microstructure, often defined as the combination of particle arrangement and bonding, can strongly influence the stiffness and strength of sedimentary deposits. As undisturbed soil sampling is a challenging task in fine-grained soils, seismic in situ testing is becoming increasingly more import...

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Bibliographic Details
Published in:International journal of environmental science and technology (Tehran) 2024-05, Vol.21 (9), p.6429-6444
Main Authors: Oberhollenzer, S., Hauser, L., Baldermann, A., Marte, R., Tschuchnigg, F., Schweiger, H. F., Nachtnebel, M., Dietzel, M.
Format: Article
Language:English
Subjects:
Aquatic Pollution
Austria
calcite
carbonates
chemical analysis
clay
Earth and Environmental Science
Ecotoxicology
electron microscopy
Environment
Environmental Chemistry
Environmental Science and Engineering
feldspar
geophysics
hydrochemistry
mechanical properties
microstructure
Original Paper
porosity
quartz
sediments
soil micromorphology
Soil Science & Conservation
soil structure
Waste Water Technology
Water Management
Water Pollution Control
water reservoirs
X-ray diffraction
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Summary:Soil microstructure, often defined as the combination of particle arrangement and bonding, can strongly influence the stiffness and strength of sedimentary deposits. As undisturbed soil sampling is a challenging task in fine-grained soils, seismic in situ testing is becoming increasingly more important to investigate its mechanical behaviour. The aim of this article is to evaluate the influences of sediment depositional age and structure-forming processes on the degree of soil structure development in Alpine deposits. Seismic in situ and laboratory testing comprising X-ray diffraction (XRD), scanning electron microscopy (SEM), pore water chemical analysis and hydrochemical modelling were executed at three Austrian test sites, namely Lokalbahn Salzburg , Rhesi and water reservoir Raggal . Based on the comparison of in situ shear wave velocities ( V S, SDMT ) with bender element results ( V S, BE ), executed on reconstituted soil specimens, it is shown that the Pleisto–Holocene-aged deposits are characterized by a V S, BE / V S ,SDMT ratio of 
ISSN:1735-1472
1735-2630
DOI:10.1007/s13762-024-05464-4