Effect of carbon fiber and nanosilica on shear properties of silty soil and the mechanisms

Cui, Hongzhi; Jin, Zhiyang; Bao, Xiaohua; Tang, Waiching; Dong, Biqin

doi:10.1016/j.conbuildmat.2018.08.181

Cited by 82 publications

(24 citation statements)

References 24 publications

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“…The friction angle was independent of ber length or kaolin content, however, an increase in the nanosilica content from 0.1% to 0.5% caused a decrease in the friction angle and an increase in cohesion. Increasing the nanosilica content increased the cohesion, but decreased the friction angle, which is in good agreement with the results reported by Cui et al (2018). The total shear strength decreased signi cantly with an increase in the nanosilica content from 0.1% to 0.5% because the rate of decrease in the friction angle was greater than the rate of increase in cohesion.…”

Section: Direct Shear Tests Resultssupporting

confidence: 91%

“…The increase in cohesion was related to the pore-lling in uence of the viscous gel produced by the nanosilica. The decrease in the friction angle could be related to the presence of small particles producing less friction and the excessive agglomeration of nanosilica, as has been explained by Cui et al (2018).…”

Section: Direct Shear Tests Resultsmentioning

confidence: 84%

“…Studies have shown that the use of nanomaterials in geotechnical construction can improve the mechanical behavior and physical and chemical characteristics of weak soil (Sameni et al 2015 Taha and Taha (2012) indicated that the addition of nano-Al 2 O 3 to soil decreased both the expansive and shrinkage strains. Cui et al (2018) studied the shear strength parameters and microstructure of silty sand treated with carbon ber and nanosilica. They reported that the shear strength parameters of specimens signi cantly increased with the addition of carbon ber and nanosilica.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Behavior of Reinforced Silty Sand: Focus on Application of Nano-Silica or Kaolin Coated Ceramic Fibers as a Reinforcement Material

Eshaghzadeh¹,

Bayat²,

Ajalloeian³

et al. 2021

Preprint

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Many studies have been done on the stabilization of weak soil using conventional chemical stabilizers such as lime, cement as well as modern materials such as nanoparticles; however, very few studies have examined the effect of coated fibers on the strength of stabilized soil. This paper presents the results of a series of direct shear tests on soil specimens treated with ceramic fiber, nanosilica, and kaolin. The effects of ceramic fibers, fiber length, nanosilica, and kaolin on the mechanical characteristics and shear strength of silty sand was investigated. The results show that the addition of fiber to silty sand resulted in a significant increase in the strength of the soil specimens. The dilative behavior of the soil specimen decreased with the addition of ceramic fibers. The cohesion of the fiber-reinforced specimens increased when the fiber surface was coated with nanosilica or kaolin particles. The friction angle of the coated fiber-reinforced specimens decreased with the addition of nanosilica particles; however, the friction angle of the coated fiber-reinforced specimens was practically independent of the kaolin content.

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Section: Direct Shear Tests Resultssupporting

confidence: 91%

Section: Direct Shear Tests Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Mechanical Behavior of Reinforced Silty Sand: Focus on Application of Nano-Silica or Kaolin Coated Ceramic Fibers as a Reinforcement Material

Eshaghzadeh¹,

Bayat²,

Ajalloeian³

et al. 2021

Preprint

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“…In this sample, the soil particles form a dense and compact matrix and are easily detected in the cementitious gel that covers the particles. On the one hand, nano-SiO 2 serves as a filler, and on the other hand, it acts as a very effective pozzolan with lime and improves the bond between particles [53,54].…”

Section: Effect Of Nanospheres On the Microstructurementioning

confidence: 99%

Effect of Selected Nanospheres on the Mechanical Strength of Lime‐Stabilized High‐Plasticity Clay Soils

Ghorbani

Hasanzadehshooiili

Mohammadi

et al. 2019

Advances in Civil Engineering

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The proper design of protective structures may start from improving the characteristics of soils. In order to obtain reasonable safety criteria, several research studies have recently been dedicated to enhancing complex civil engineering structural systems with the use of nanotechnology. Thus, the following paper investigates the effect of nanospheres, including nanosilica (nano-SiO2) and nano zinc oxide (nano-ZnO), on lime-stabilized high-plasticity clay soil. For this purpose, unconfined compressive strength (UCS) and California bearing ratio (CBR) tests were performed on samples. The results showed that the use of the selected nanospheres greatly increased the UCS of the samples compared to untreated soil. The UCS value of samples containing 6% lime and 1.5% nano-ZnO after 28 days of treatment increased by 5-fold compared to the UCS of untreated samples. In addition, the samples containing 6% lime and 2% nano-SiO2, with similar curing conditions, experienced a 5.3-fold increase in their UCS value compared to the untreated samples. These compounds were considered as the optimal amounts and showed the highest mechanical strength in both UCS and CBR tests. The same trend was achieved in the CBR test, in which the CBR value for the optimal mixtures containing nano-ZnO and nano-SiO2 was 14.8 and 16.6 times higher than that of high-plasticity clay soil, respectively. Finally, the results obtained from scanning electron microscopy (SEM) analysis revealed that the nanospheres caused a dense and compact matrix to form in the soil, which led to the enhancement of the mechanical strength of the treated samples.

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“…In the area with problem liquefaction also they came as handy solution to slow down disaster. Apart from those mentioned, usage of fiber caught interest and being studied in [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. This study will further address the gap in the literature by considering combination of fiber and bentonite together with sand.…”

Section: Introductionmentioning

confidence: 96%

Compactive Energy Level Effect on Strength of Fiber-Bentonite-Sand Mixture

Chegenizadeh¹

2020

IJETER

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Compaction is one of the preliminary stage of testing. The sample preparation is one of the effective measure in the outcome of the tests. Two methods of compaction (i.e standard and modified) were used in sample preparation. The mixture of soil was bentonite and different fiber percentages. The fiber dosage varied as 5%, 10% and 15%.The results showed that with increasing in compactive effort the UCS values increased.

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Effect of carbon fiber and nanosilica on shear properties of silty soil and the mechanisms

Cited by 82 publications

References 24 publications

Mechanical Behavior of Reinforced Silty Sand: Focus on Application of Nano-Silica or Kaolin Coated Ceramic Fibers as a Reinforcement Material

Mechanical Behavior of Reinforced Silty Sand: Focus on Application of Nano-Silica or Kaolin Coated Ceramic Fibers as a Reinforcement Material

Effect of Selected Nanospheres on the Mechanical Strength of Lime‐Stabilized High‐Plasticity Clay Soils

Compactive Energy Level Effect on Strength of Fiber-Bentonite-Sand Mixture

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