Stabilizing Geotechnical Properties of Loess Soil by Mixing Recycled Polyester Fiber and Nano-SiO2

Sarli, Jalil Mohammad; Hadadi, Farhad; Bagheri, Rahmat-Allah

doi:10.1007/s10706-019-01078-7

Cited by 31 publications

(14 citation statements)

References 33 publications

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“…Furthermore, the initial structural failure point of the remoulded B2 is about 9% (Figure 9(c)), while that of the remoulded A2 is about 10% (Figure 9(b)), implying that the sample B2 (containing 5% nano-SiO 2 ) has better improvement effect than sample A2 (containing 3% nano-SiO 2 ). at is to say, the increase of nano-SiO 2 is conducive to the improvement of loess strength, which is consistent with what Sarli et al found in their study [26].…”

Section: St Resultssupporting

confidence: 91%

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Study on Treatment of Loess Landslide Based on Nanosilica and Fly Ash Composite Stabilizer Filling Fissures

Gao

Wang

Yao

et al. 2020

Advances in Civil Engineering

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Frequent occurrence of landslides has seriously threatened the infrastructural projects in the Loess Plateau, China. At the beginning, with development of the landslide, several fissures were generated along the internal weak surface. Then, under the constant influence of rainfall and irrigation, the fissures were expanded and connected, which formed a consecutive sliding surface, consequently leading to the occurrence of the landslide. Therefore, the key to treat the landslide is to prevent the expansion and connection of fissures in the potential slip zone inside the slope. In this paper, an old landslide, which occurred at an early stage of the construction of the Lvliang Airport, was selected as a case study. A new type of grouting material was used to fill the fissures and reinforce the loess in the slip zone, so as to study the effect of material content on the slope stability. With current methods, loess specimens were taken from the slip zone inside the Lvliang Airport slope. Based on the GDS triaxial test system, a series of laboratory tests were performed on the undisturbed loess and the remolded which contained the stabilizer, including triaxial shear tests at constant matric suctions and wetting tests at constant deviator stresses. Moreover, the dichotomy in mathematics was chosen to find the threshold of the material content. The test results showed that the cohesion and the internal friction angle of the loess obviously increased after grouting. The failure behaviour of the loess along the wetting path was dependent on the material ratio and the stress level. Meanwhile, the critical state line of the slope, grouted with materials of different ratios, was compared by fitting the regression equation. It was found that the threshold value of the stabilizer content was between 15% and 20%, which was the most suitable ratio for improving slope stability with relatively lower cost.

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Section: St Resultssupporting

confidence: 91%

“…In limited studies, the properties of nano-SiO 2 to improve the mechanical properties of soil have been continuously verified [22,25]. Compared with traditional chemical additives such as cement and lime, the application of nano-SiO 2 in soil improvement greatly reduces the total cost of the stabilizer [26].…”

Section: Introductionmentioning

confidence: 99%

Study on Treatment of Loess Landslide Based on Nanosilica and Fly Ash Composite Stabilizer Filling Fissures

Gao

Wang

Yao

et al. 2020

Advances in Civil Engineering

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“…Loess has the characteristics of collapsibility and high sensitivity. It may cause geological disasters such as landslides and uneven settlement of the foundation [2,[4][5][6]. Therefore, the loess needs to be modified when building on it.…”

Section: Introductionmentioning

confidence: 99%

Strength Tests and Numerical Simulations of Loess Modified by Desulfurization Ash and Fly Ash

Cheng

Yuchao

et al. 2022

Materials

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Desulfurization ash and fly ash are solid wastes discharged from boilers of power plants. Their utilization rate is low, especially desulfurization ash, most of which is stored. In order to realize their resource utilization, they are used to modify loess in this paper. Nine group compaction tests and 32 group direct shear tests are done in order to explore the influence law of desulfurization ash and fly ash on the strength of the loess. Meanwhile, FLAC3D software is used to numerically simulate the direct shear test, and the simulation results and the test results are compared and analyzed. The results show that, with the increase of desulfurization ash’s amount, the shear strength of the modified loess increases first and then decreases. The loess modified by the fly ash has the same law with that of the desulfurization ash. The best mass ratio of modified loess is 80:20. When the mass ratio is 80:20, the shear strength of loess modified by the desulfurization ash is 12.74% higher than that of the pure loess on average and the shear strength of loess modified by fly ash is 3.59% higher than that of the pure loess on average. The effect of the desulfurization ash on modifying the loess is better than that of the fly ash. When the mass ratio is 80:20, the shear strength of loess modified by the desulfurization ash is 9.15% higher than that of the fly ash on average. Comparing the results of the simulation calculation with the actual test results, the increase rate of the shear stress of the FLAC3D simulation is larger than that of the actual test, and the simulated shear strength is about 8.21% higher than the test shear strength.

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“…The addition of carbon ber to soil increased both the friction angle and cohesion; however, the nanosilica increased only the cohesion. Sarli et al (2020) indicated that the addition of recycled polyester and nano-SiO 2 to loess soil increased its shear strength.…”

Section: Introductionmentioning

confidence: 99%

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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Stabilizing Geotechnical Properties of Loess Soil by Mixing Recycled Polyester Fiber and Nano-SiO2

Cited by 31 publications

References 33 publications

Study on Treatment of Loess Landslide Based on Nanosilica and Fly Ash Composite Stabilizer Filling Fissures

Study on Treatment of Loess Landslide Based on Nanosilica and Fly Ash Composite Stabilizer Filling Fissures

Strength Tests and Numerical Simulations of Loess Modified by Desulfurization Ash and Fly Ash

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

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