Mechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica

In order to explore the effect of composite materials on the mechanical properties of coastal cement soil, cement soil samples with different iron tailings and nano silica contents were prepared, and unconfined compression and scanning electron microscope tests were carried out. The results show tha...

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Autores principales:	Xinjiang Song, Haibo Xu, Deqin Zhou, Kai Yao, Feifei Tao, Ping Jiang, Wei Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	coastal cemented soil nano silica iron tailings mechanical properties microscopic mechanism Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/3b2220a2684d40c4bd417cbab5d23f5f
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spelling	oai:doaj.org-article:3b2220a2684d40c4bd417cbab5d23f5f2021-11-25T17:18:21ZMechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica10.3390/cryst111113312073-4352https://doaj.org/article/3b2220a2684d40c4bd417cbab5d23f5f2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1331https://doaj.org/toc/2073-4352In order to explore the effect of composite materials on the mechanical properties of coastal cement soil, cement soil samples with different iron tailings and nano silica contents were prepared, and unconfined compression and scanning electron microscope tests were carried out. The results show that: (1) The compressive strength of cement soil containing a small amount of iron tailings is improved, and the optimum content of iron tailings is 20%. (2) Nano silica can significantly improve the mechanical properties of iron tailings and cement soil (TCS). When the content of nano silica is 0.5%, 1.5%, and 2.5%, the unconfined compressive strength of nano silica- and iron tailings-modified cement soil (STCS) is 24%, 137%, and 323% higher than TCS, respectively. (3) Nano silica can promote the hydration reaction of cement and promote the cement hydration products to adhere to clay particles to form a relatively stable structure. At the same time, nano silica can fill the pores in TCS and improve the compactness of STCS.Xinjiang SongHaibo XuDeqin ZhouKai YaoFeifei TaoPing JiangWei WangMDPI AGarticlecoastal cemented soilnano silicairon tailingsmechanical propertiesmicroscopic mechanismCrystallographyQD901-999ENCrystals, Vol 11, Iss 1331, p 1331 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coastal cemented soil nano silica iron tailings mechanical properties microscopic mechanism Crystallography QD901-999
spellingShingle	coastal cemented soil nano silica iron tailings mechanical properties microscopic mechanism Crystallography QD901-999 Xinjiang Song Haibo Xu Deqin Zhou Kai Yao Feifei Tao Ping Jiang Wei Wang Mechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica
description	In order to explore the effect of composite materials on the mechanical properties of coastal cement soil, cement soil samples with different iron tailings and nano silica contents were prepared, and unconfined compression and scanning electron microscope tests were carried out. The results show that: (1) The compressive strength of cement soil containing a small amount of iron tailings is improved, and the optimum content of iron tailings is 20%. (2) Nano silica can significantly improve the mechanical properties of iron tailings and cement soil (TCS). When the content of nano silica is 0.5%, 1.5%, and 2.5%, the unconfined compressive strength of nano silica- and iron tailings-modified cement soil (STCS) is 24%, 137%, and 323% higher than TCS, respectively. (3) Nano silica can promote the hydration reaction of cement and promote the cement hydration products to adhere to clay particles to form a relatively stable structure. At the same time, nano silica can fill the pores in TCS and improve the compactness of STCS.
format	article
author	Xinjiang Song Haibo Xu Deqin Zhou Kai Yao Feifei Tao Ping Jiang Wei Wang
author_facet	Xinjiang Song Haibo Xu Deqin Zhou Kai Yao Feifei Tao Ping Jiang Wei Wang
author_sort	Xinjiang Song
title	Mechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica
title_short	Mechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica
title_full	Mechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica
title_fullStr	Mechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica
title_full_unstemmed	Mechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica
title_sort	mechanical performance and microscopic mechanism of coastal cemented soil modified by iron tailings and nano silica
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3b2220a2684d40c4bd417cbab5d23f5f
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Mechanical Performance and Microscopic Mechanism of Coastal Cemented Soil Modified by Iron Tailings and Nano Silica

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