Influence of nano-silica and sodium silicate on the strength characteristics of clay soil

Selvakumar, S.; Kulanthaivel, P.; Soundara, B.

doi:10.1007/s41204-021-00142-z

Cited by 19 publications

(5 citation statements)

References 12 publications

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“…Lime fly ash and sodium silicate underwent hydration, ion exchange, crystallization, and other reactions during maintenance in the soil. The generated cement filled the pores and refined the pore size, thereby making the overall skeleton more compact [45][46][47][51][52][53]. Under the action of cyclic loading, the damage to the overall skeleton was not obvious; therefore, the E d of the SLS decreased slowly with an increase in EC.…”

Section: Test Results and Discussionmentioning

confidence: 99%

Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

et al. 2023

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In recent years, expanded polystyrene (EPS) lightweight soil has been widely used as subgrade in soft soil areas because of its light weight and environmental protection. This study aimed to investigate the dynamic characteristics of sodium silicate modified lime and fly ash treated EPS lightweight soil (SLS) under cyclic loading. The effects of EPS particles on the dynamic elastic modulus (Ed) and damping ratio (λ) of SLS were determined through dynamic triaxial tests at various confining pressures (σ3), amplitudes, and cycle times. Mathematical models of the Ed of the SLS, cycle times, and σ3 were established. The results revealed that the EPS particle content played a decisive role in the Ed and λ of the SLS. The Ed of the SLS decreased with an increase in the EPS particle content (EC). The Ed decreased by 60% in the 1–1.5% range of the EC. The existing forms of lime fly ash soil and EPS particles in the SLS changed from parallel to series. With an increase in σ3 and amplitude, the Ed of the SLS gradually decreased, the λ generally decreased, and the λ variation range was within 0.5%. With an increase in the number of cycles, the Ed of the SLS decreased. The Ed value and the number of cycles satisfied the power function relationship. Additionally, it can be found from the test results that 0.5% to 1% was the best EPS content for SLS in this work. In addition, the dynamic elastic modulus prediction model established in this study can better describe the varying trend of the dynamic elastic modulus of SLS under different σ3 values and load cycles, thereby providing a theoretical reference for the application of SLS in practical road engineering.

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Section: Test Results and Discussionmentioning

confidence: 99%

Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

et al. 2023

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“…The size of the particles can get altered under different laboratory conditions e.g., time, mixing method and additive type etc. [18][19][20] .…”

Section: Structural Propertiesmentioning

confidence: 99%

Application of Nanotechnology in Soil Stabilization

Kumar,

Devi

2023

Jour. of build. mater. Sci.

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Nano-technology is expanding its horizon in various science and technology fields. In civil engineering, soil is a complex material and used for various functions and applications. Meanwhile, sometimes an effective soil stabilization technique is needed to fulfil the site criteria and can be achieved by adopting various methods e.g., physical, chemical, thermal or reinforcement using geotextiles and fabrics. The mechanism of soil stabilization using nanomaterials is still unexplored and open to prospective researchers. The present article attempts to touch and explore the possibilities of nano-technology in soil improvement and its applications in various civil engineering works. Microstructural analysis of the nanomaterials treated soils using the latest equipment has also been discussed. The study interprets that the use of nano materials is still limited, due to their high cost and sophisticated handling procedures. Though the use of nanoparticles in soil stabilization results in extraordinary improvements in various soil properties, the improved soil properties could be utilized for various geotechnical projects. The present study bridges the past findings to the present scenario of nanomaterials in soil improvement.

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“…They evaluated several additives/supplementary materials as partial substitutions of cement. Selvakumar et al evaluated the influence of silica nanoparticles and sodium silicate on clayey soil's strength parameters 14 . Kulanthaivel et al investigated how nano-silica, fibers, bio-cemented egg shell, other nano-materials, and white cement affect clay and sandy soils 15 – 18 .…”

Section: Introductionmentioning

confidence: 99%

Nano soil improvement technique using cement

Niroumand,

Balachowski,

Parviz

2023

Sci Rep

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Nano soil-improvement is an innovative idea in geotechnical engineering. Nanomaterials are among the newest additives that improve soil properties. Herein, laboratory tests, such as unconfined compressive strength, direct shear test, and initial tests, were conducted to investigate the geotechnical properties of Kelachay clay with micro- and nanosized cement to evaluate its particles in untreated soil and observe changes in the behavioral properties of treated soil compared to those of untreated soil. Scanning electron microscopy and X-ray fluorescence images were analyzed before and after the grinding process to determine the nature of the studied particles. Furthermore, effects of time and nanocement content (0%, 1%, 3%, 5%, and 7%) on curing performance were evaluated. The optimum percentage of nano-cement was found to be 7%, which increased the unconfined compressive strength by up to 29 times and reduced the strain at rupture by 74% compared to the untreated soil. The results showed that nano-cement significantly improved the strength and stiffness of the soil–cement mixture by forming calcium silicate hydrate (C–S–H) gel that filled the pores and bonded the soil particles. Nano-cement also acted as a nucleation site for more C–S–H growth, enhancing the durability and strength of the mixture.

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Influence of nano-silica and sodium silicate on the strength characteristics of clay soil

Cited by 19 publications

References 12 publications

Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

Application of Nanotechnology in Soil Stabilization

Nano soil improvement technique using cement

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