Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration

Understanding property changes in soil improvement using a new technique is critical for enhancing engineering activity. However, little is known about nano-SiO2 pile-induced changes in soil properties due to its excellent properties as an alternative new additive material. This study aims to examin...

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Autores principales:	Ran Kong, Lei Gao, Wenqing Zhao, Bo Zhao
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	loess nano-SiO2 pile nanoparticle migration multi-scale analysis stabilization Science Q
Acceso en línea:	https://doaj.org/article/251b760d6c3c410088b8ff7bd6e4b0f8
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spelling	oai:doaj.org-article:251b760d6c3c410088b8ff7bd6e4b0f82021-11-15T05:36:07ZMulti-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration2296-646310.3389/feart.2021.747317https://doaj.org/article/251b760d6c3c410088b8ff7bd6e4b0f82021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.747317/fullhttps://doaj.org/toc/2296-6463Understanding property changes in soil improvement using a new technique is critical for enhancing engineering activity. However, little is known about nano-SiO2 pile-induced changes in soil properties due to its excellent properties as an alternative new additive material. This study aims to examine the changes in properties of loess stabilized with nano-SiO2 pile after curing for 28 days. Using samples taken from four desired radii (i.e., 5, 10 15, and 20 cm), we tested their mineralogical, structural, physicochemical, and index properties and analyzed the relationship of these properties to strengthen the link between microscopic characteristics and macroscopic behaviors. We then discussed the mechanism of the changes in the treated loess properties. The test results show that nano-SiO2 pile induced a physical structure modification in the treated loess and, consequently, an isotropic process with coarser particles due to crystallinity. This resulted in a solidification process in loess with nano-SiO2 pile, causing a decrease in water content and void ratio as well as an increase in natural density, thereby improving its mechanical strength. Meanwhile, the specific surface area (SSA)and cation exchange capacity (CEC) of treated loess were smaller than those of original loess, and there were slight changes in chemical properties. The disintegration rate of treated loess decrease compared with the original loess. The interactional relationship of the microscopic and macroscopic observation was facilitated to better understand the mechanism of changes in nano-SiO2 pile-treated loess properties. This finding reveals that nano-SiO2 pile has the potential as an alternative stabilized technique in loess improvement due to its obvious performance improvement and slight chemical changes.Ran KongLei GaoWenqing ZhaoBo ZhaoFrontiers Media S.A.articleloessnano-SiO2 pilenanoparticle migrationmulti-scale analysisstabilizationScienceQENFrontiers in Earth Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	loess nano-SiO2 pile nanoparticle migration multi-scale analysis stabilization Science Q
spellingShingle	loess nano-SiO2 pile nanoparticle migration multi-scale analysis stabilization Science Q Ran Kong Lei Gao Wenqing Zhao Bo Zhao Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration
description	Understanding property changes in soil improvement using a new technique is critical for enhancing engineering activity. However, little is known about nano-SiO2 pile-induced changes in soil properties due to its excellent properties as an alternative new additive material. This study aims to examine the changes in properties of loess stabilized with nano-SiO2 pile after curing for 28 days. Using samples taken from four desired radii (i.e., 5, 10 15, and 20 cm), we tested their mineralogical, structural, physicochemical, and index properties and analyzed the relationship of these properties to strengthen the link between microscopic characteristics and macroscopic behaviors. We then discussed the mechanism of the changes in the treated loess properties. The test results show that nano-SiO2 pile induced a physical structure modification in the treated loess and, consequently, an isotropic process with coarser particles due to crystallinity. This resulted in a solidification process in loess with nano-SiO2 pile, causing a decrease in water content and void ratio as well as an increase in natural density, thereby improving its mechanical strength. Meanwhile, the specific surface area (SSA)and cation exchange capacity (CEC) of treated loess were smaller than those of original loess, and there were slight changes in chemical properties. The disintegration rate of treated loess decrease compared with the original loess. The interactional relationship of the microscopic and macroscopic observation was facilitated to better understand the mechanism of changes in nano-SiO2 pile-treated loess properties. This finding reveals that nano-SiO2 pile has the potential as an alternative stabilized technique in loess improvement due to its obvious performance improvement and slight chemical changes.
format	article
author	Ran Kong Lei Gao Wenqing Zhao Bo Zhao
author_facet	Ran Kong Lei Gao Wenqing Zhao Bo Zhao
author_sort	Ran Kong
title	Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration
title_short	Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration
title_full	Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration
title_fullStr	Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration
title_full_unstemmed	Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration
title_sort	multi-scale analysis of geotechnical and physicochemical changes in loess caused by nano-sio2 pile migration
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/251b760d6c3c410088b8ff7bd6e4b0f8
work_keys_str_mv	AT rankong multiscaleanalysisofgeotechnicalandphysicochemicalchangesinloesscausedbynanosio2pilemigration AT leigao multiscaleanalysisofgeotechnicalandphysicochemicalchangesinloesscausedbynanosio2pilemigration AT wenqingzhao multiscaleanalysisofgeotechnicalandphysicochemicalchangesinloesscausedbynanosio2pilemigration AT bozhao multiscaleanalysisofgeotechnicalandphysicochemicalchangesinloesscausedbynanosio2pilemigration
_version_	1718428540624437248

Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration

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